TEXAS INSTRUMENTS TPS65800 Technical data

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SYS_IN

SM1

PGND1

PGND2

SM2

AGND0

SM3

FB3

SM3SW

OUT

SIM

OUT

GPIO1

USB

GPIO2

LDO_PM

PWM

RED

BA T

GREEN

BA T

BLUE

TMR

SCLK

ISET1

SDA T

DPPM

INT

RESPWRON

R TC_OUT

TRSTPWON

HOT_RST

LDO1

LDO0

LDO3

LDO35_REF

VIN_LDO35

LDO4

ADC_REF

AGND2

ANLG1

ANLG2

LDO5

GPIO3

GROUNDPAD

AGND1

VIN_LDO02

PGND3

VIN_SM2

VIN_SM1

25 282624232219 21201817

LED_PWM

LDO2

48 47 434446 4549505154 5256 5355

1615

QFN56-Pin,8x8mmPackage

(TopView-NotToScale)

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

SINGLE-CELL Li-ION BATTERY- AND POWER-MANAGEMENT IC

TPS65800

FEATURES

• BATTERY CHARGER

– Complete charge management solution for

single Li-Ion/Li-Pol cell with thermal

– 8-channel integrated A/D samples system

parameters with single conversion, peak detection, or averaging operating modes

• HOST INTERFACE

foldback, dynamic power management, – Host can set system parameters and and pack temperature sensing, supporting access system status using I2C interface up to 1.5-A maximum charge current

– Interrupt function with programmable

– Programmable charge parameters for AC masking signals system status modifiction

adapter and USB port operation to host

• INTEGRATED POWER SUPPLIES – 3 GPIO ports, programmable as drivers,

– A total of 9 LDOs are integrated:

– Six adjustable output LDOs (1.25-V to

3.3-V) – Two fixed-voltage LDOs (3.3-V) – One RTC backup supply with low

leakage (3.1-V)

– Two 600-mA, programmable dc/dc buck

converters (0.6-V to 3.4-V) with enable, standby-mode operation, and automatic

integrated A/D trigger or buck converters standby mode control

APPLICATIONS

• PDAs

• Smart Phones

• MP3s

• Internet Appliances

• Handheld Devices

low-power mode setting

• DISPLAY FUNCTIONS

– Two open-drain PWM outputs with

programmable frequency and duty cycle. Can be used to control keyboard backlight, vibrator, or other external peripheral functions

– RGB LED driver with programmable

flashing period and individual R/G/B brightness control

– Constant-current white LED driver, with

programmable current level, brightness control, and overvoltage protection can drive up to 6 LEDs in series configuration

• SYSTEM MANAGEMENT

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

– Dual input power path function with input

current limiting and OV protection

– POR function with programmable masking

monitors all integrated supplies outputs

– Software and hardware reset functions

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

DESCRIPTION

The TPS65800 provides an easy to use, fully integrated solution for handheld devices, integrating charge management, multiple regulated power supplies, system management and display functions, in a small thermally-enhanced 8x8-mm package. The high level of integration enables typical board area space savings of 70% when compared to equivalent discrete solutions, while implementing a high-performance and flexible solution, portable across multiple platforms. If required, an external host may control the TPS65800 via I2C interface, with access to all integrated systems. The I2C enables setting output voltages, current thresholds, and operation modes. Internal registers have a complete set of status information, enabling easy diagnostics, and host-controlled handling of fault conditions. The TPS65800 can operate in stand-alone mode, with no external host control, if the internal power-up defaults are compatible with the system requirements

AVAILABLE OPTIONS

–40 ° C to 125 ° C TPS65800RTQ TPS65800

(1) For the most current package and ordering information, see the Package Option Addendum at the end

of this document, or see the TI Web site at www.ti.com .

(2) The RTQ package is available in tape and reel. Add R suffix (TPS65800RTQR) to order quantities of

2000 parts per reel. Add T suffix (TPS65800RTQT) to order quantities of 250 parts per reel.

(3) This product is RoHS compatible, including a lead concentration that does not exceed 0.1% of total

product weight, and is suitable for use in specified lead-free soldering processes. In addition, this product uses package materials that do not contain halogens, including bromine (Br) or antimony (Sb) above 0.1% of total product weight.

(4) Other power-up sequences and default power-up states for the supplies can be implemented upon

request. Consult factory for available options.

DEVICES

(2) (3) (4)

(1)

MARKING

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RTC_OUT

BAT

OUT

USB

TMR

ISET1

I2CINTERFACE

ANDINTERRUPT

CONTROLLER

INT

SDAT

SCLK

RESET

CONTROLLER

HOT_RST

RESPWRON

TRSTPWON

PGND1

SM2

SM3

SIM

RED

BLUE

GREEN

SYS_IN

1.25V-3.3V 150 mA

LDO1

1.25V-3.3V 150 mA

LDO2

LDO3

1.224V-4.4V 100 mA

VIN_LDO35

1.224V-4.4V 100 mA

LDO4

LDO35_REF

ANLG1

ANLG2

GPIO1

GPIO2

3.3V

10 mA

LDO_PM

FB3

BAT

OUT

ADC_REF

GPIO3

AGND2

PGND3

VIN_SM1

VIN_SM2

PGND2

VIN_LDO12

DPPM

PWM

1.224V-4.4V 100 mA

LDO5

AGND1

LED_PWM

3.3V

150 mA

LDO0

AGND0

LDO3,4 ,5

LDO0,1,2

CONTROL

LOGIC

PWM

DRIVER

RGB

DRIVER

WHITELED

DRIVER

DISPLAY ANDI /O

GPIO’S

OUT

SM1

8 CHANNEL

MUX

A/D

CONVERTER

6 INTERNAL CHANNELS

SM3_SW

3.1V

8 mA

1.8V/3.3V 8 mA

POWERPATH

CONTROL

LINEAR

CHARGER

0.6-1.8V 600 mA

1.0V-3.4V 600 mA

LDO_PM

CHARGE

MANAGEMENT

DC/DC

HOSTINTERFACE AND

SEQUENCING

ADC

AGND2

REFERENCE

SYSTEM

INTERNAL BIAS

OUT

TPS65800

SIM,RTCLDOS

SYSTEM

POWER

ON/OFF

OUT

AGND1AGND1

AGND1

OUT

AGND1

OUT

AGND1

BAT

AGND1

AGND 0,

AGND1,

AND AGND2 PINSSHORTEDTOEACHOTHERINSIDETPS 65800. ALL AGNDPINS AREINTERNALLY CONNECTEDTO THETPS 65800 THERMAL PAD ANDSUBSTRATE. PGND1 ,PGND2, ANDPGND3 PINS ARENOTCONNECTEDTOEACHOTHERORTOTHETPS65800SUBSTRATE/POWERPAD

DISPLAY ANDI /O

OUT

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

FUNCTIONAL BLOCK DIAGRAM

Figure 1. TPS65800 simplified block diagram

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TPS65800

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range (unless otherwise noted)

AC and USB with respect to AGND1 –0.3 to 18 ANLG1, ANLG2 with respect to AGND2 –0.3 to V(OUT) V(OUT) with respect to AGND1 5 VIN_LDO12, VIN_LDO35, LDO3, LDO4, LDO5 with respect to AGND2 –0.3 to V(OUT) LDO35_REF, ADC_REF with respect to AGND2 –0.3 to smaller of: 3.6 or V(OUT) SIM, RTC_OUT with respect to AGND1 –0.3 to smaller of: 3.6 or V(OUT) SM1, L1, VIN_SM1 with respect to PGND1 –0.3 to V(OUT) V SM2, L2, VIN_SM2 with respect to PGND2 –0.3 to V(OUT) SM3, L3 with respect to PGND3 –0.3 to 29 SM3SW with respect to PGND3 –0.3 to V(OUT) FB3 with respect to PGND3 –0.3 to 0.5 All other pins (except AGND and PGND), with respect to AGND1 –0.3 to V(OUT) AGND2, AGND0, PGND1, PGND2, PGND3 with respect to AGND1 –0.3 to +0.3 Input Current, AC pin 2750 Input Current, USB pin 600 Output continuous current, OUT pin 3000 mA Output conitnuous current, BAT pin –3000

Continuous Current at L1, PGND1, L2, PGND2 1800 T T T

(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

Operating free-air temperature –40 to 85

Maximum junction temperature 125

Storage temperature –65 to 150

STG

Lead temperature 1,6 mm (1/16-inch) from case for 10 seconds 260

ESD rating, all pins 1.5 kV

only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(1)

VALUE UNIT

° C

DISSIPATION RATINGS

PACKAGE θ

(1) (2)

RTQ

21.7 ° C/W 3.22 W 0.046 W/ ° C

(1) This data is based on using the JEDEC High-K board and the exposed die pad is connected to a Cu

pad on the board. This is connected to the ground plane by a via matrix.

(2) The RTQ package MSL level: HIR3 at 260 ° C

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TA≤ 55 ° C DERATING FACTOR

POWER RATING ABOVE TA= 55 ° C

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SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

RECOMMENDED OPERATING CONDITIONS

MIN MAX UNIT

AC and USB with respect to AGND1 4.35 16.5 ANLG1, ANLG2 with respect to AGND2 0 2.6 V VIN_LDO35 with respect to AGND2 Greater of: 3.6 V OR minimum input 4.7 VIN_LDO12 with respect to AGND1 4.7 VIN_SM1 with respect to PGND1 4.7 VIN_SM2 with respect to PGND2 4.7 SM3 with respect to PGND3 28 V

Operating free-air temperature –40 85 ° C

Junction temperature, functional operation assured –40 125 ° C

J(o

Junction temperature, electrical characteristics assured 0 125 ° C

(1) Thermal operating restrictions are reduced or avoided if input voltage does not exceed 5 V.

voltage required for LDO/converter

operation outside dropout region

TPS65800

(1)

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su(STOP)

(BUF)

STOP

START

9873

ACK

SCL

SDA

su(STA)

START

STOP

h(STA)

h(DAT)

su(DAT)

SCL

SDA

w(H)

w(L)

h(DAT)

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ELECTRICAL CHARACTERISTICS – I2C INTERFACE

Over recommended operating conditions (typical values at TJ= 25 ° C), application circuit as in figure (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

I2C TIMING CHARACTERISTICS

w(H)

w(L)

SU(STA)

H(STA)

SU(DAT)

H(DAT)

SU(STOP)

(BUF)

FSCL Clock frequency 400 kHz

I2C INTERFACE LOGIC LEVELS

SCLK/SDATA rise time 300 SCLK/SDATA fall time 300 ns SCLK pulse duration, high 600 SCLK pulse duration, low 1.3 µ s Setup time for START condition 600 START condition hold time after which first clock pulse is generated 600 Data setup time 100 ns Data hold time 0 Setup time for STOP condition 600 Bus free time between START and STOP condition 1.3 µ s

High level input voltage 1.3 6 Low level input voltage 0 0.4 Input bias current 0.01 µ A

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Figure 2. I2C Timing

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SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ELECTRICAL CHARACTERISTICS – SYSTEM SEQUENCING AND OPERATING MODES

Over recommended operating conditions (typical values at TJ= 25 ° C), application circuit as in Figure 3 (unless otherwise noted).

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

QUIESCENT CURRENT

BAT(SLEEP)

BAT(DONE)

BAT(CHGOFF)

INP(CHGOFF)

UNDERVOLTAGE LOCKOUT

UVLO

UVLO_HYS

DGL(UVLO)

SYSTEM LOW VOLTAGE THRESHOLD

LOW_SYS

HYS(LOWSYS)

DGL(LOWSYS)

THERMAL FAULT

SHUT

HYS(SHUT)

INTEGRATED SUPPLY POWER FAULT DETECTION

PGOOD

HYS(PGOOD)

HOT RESET FUNCTION

HRSTON

HRSTOFF

DGL(HOTRST)

SYSTEM RESET – OPEN DRAIN OUTPUT RESPWRON

RSTLO

TRSTPWON

RESET

SEQUENCING DELAYS

DLY(D1)

BAT pin current, sleep mode set

Input power not detected, V(BAT) = 4.2 V, Sleep mode set 370

BAT pin current, charge Charger function enabled by I2C, termination detected, input terminated power detected and selected

BAT pin current, charge Charger function disabled by I2C, termination not detected, function OFF input power detected and selected

AC or USB pin current, charge function OFF

Internal UVLO detection NO POWER mode set at V(OUT) < V threshold V(OUT) decreasing

UVLO detection hysteresis

UVLO detection deglitch time

Minimum system voltage System voltage V(SYS_IN) decreasing, SLEEP mode set if detection threshold V(SYS_IN) < V

Minimum system voltage detection hysteresis

Minimum system voltage detection deglitch time

Charger function disabled by I2C, termination not detected, input power detected and selected. All integrated supplies 200 and drivers OFF, no load at OUT pin.

UVLO

–3% 2.5 3% V

V(OUT) increasing 120 mV

Falling voltage only 5 ms

LOW_SYS

0.97 1 1.03 V

V(SYS_IN) increasing 50 mV

V(SYS_IN) decreasing 5 ms

Thermal shutdown Increasing junction temperature 165 Thermal shudown

hysteresis

Power-good fault Falling output voltage, applies to all integrated supply detection threshold outputs. Referenced to the programmed output voltage value

Power-good fault Rising output voltage, applies to all integrated supply outputs. detection hysteresis Referenced to V

Low-level input voltage RESET mode set at V( HOT_RESET) < V High level input voltage HOT reset not active at V( HOT_RESET) > V

Decreasing junction temperature 30

85% 90% 93%

threshold

PGOOD

HRSTON

HRSTOFF

3% 5% 7%

1.3

Hot reset input deglitch 5 ms

Low level output voltage IIL= 10 mA, V( RESPWRON ) < V

RSTLO

Pullup current source Internally connected to TRSTPWRON pin 0.9 1.0 1.12 µ A Reset timer constant T

= K

RESET

× C

RESET

TRSTPWON

Sequencing delay See sequencing timing diagram 0.24 Sequencing delay See sequencing timing diagram 12

TPS65800

0.4

0 0.3 V

1 ms/nF

µ A

° C

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ELECTRICAL CHARACTERISTICS – POWER PATH AND CHARGE MANAGEMENT

Over recommended operating conditions (typical values at TJ= 25 ° C), application circuit as in Figure 3 (unless otherwise noted).

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

VOLTAGE DETECTION THRESHOLDS

IN(DT)

IN(NDT)

DGL(NDT)

SUP(DT)

SUP(NDT)

Input Voltage detection AC detected at V(AC)– V(BAT) > V threshold USB detected at V(USB)– V(BAT) > V

Input Voltage removal AC not detected at V(AC)– V(BAT) < V threshold USB not detected at V(USB)– V(BAT) < V

Power not detected deglitch 22.5 ms Supplement detection

threshold Supplement not detected

threshold

POWER PATH INTEGRATED MOSFETs CHARACTERISTICS

ACDO

USBDO

BATDODCH

BATDOCH

AC switch dropout voltage 350 375

USB switch dropout voltage

Battery switch dropout voltage, discharge

Battery switch dropout voltage, charge

POWER PATH INPUT CURRENT LIMIT

INP(LIM1)

INP(LIM2)

Selected Input current limit, applies to USB input only

Selected Input current limit,

INP(LIM3)

applies to either AC or USB 2.75 A input

SYSTEM REGULATION VOLTAGE

SYS(REG)

Output regulation voltage 4.6 4.7 V

POWER PATH PROTECTION AND RECOVERY FUNCTIONS

INOUTSH

SH(USBSH)

SH(ACSH)

Input-to-output short-circuit detection threshold

OUT short circuit recovery pullup resistor

Overvoltage detection Rising voltage, overvoltage detected when V(AC) > V

OVP

threshold V(USB) > V Overvoltage detection Falling voltage, relative to detection threshold 0.1

hysteresis

BATOUTSH

BLK(SHBAT)

SH(BAT)

DCH(BAT)

Battery to Output short BAT switch set to OFF if V(BAT)-V(OUT)> V circuit detection threshold

Battery-to-ouput short-circuit V(DPPM) < 1v, t blanking time constant connected from DPPM pin to AGND1

OUT short circuit recovery V pullup current source internal current source connected between OUT and BAT

BAT short circuit recovery V resistor Internal resistor connected from OUT to BAT

BAT pulldown resistor 500 Ω

Battery switch ON at V(BAT) – V(OUT) > V

Battery switch OFF at V(BAT)– V(OUT) < V

= V(AC)– V(OUT); V(AC) = 4.75 V AC input current limit set to 2.75 A

ACDO

(typ), I V

USBDO

USB input current limit set to 2.75 A (typ)

V(BAT): 3 V → V

= 1.0 A

O(OUT)

= V(USB)– V(OUT); V(USB) = 4.6 V

, I(BAT) = –1 A 60 100

CH(REG)

Charger on, V(BAT): 3 V → 4.2 V, I(BAT) = 1 A 60 100

Selected input switch not in dropout, I2C settings: ISET2 = LO, PSEL = LO

Selected input switch not in dropout, I2C settings: ISET2 = HI, PSEL = LO

Selected input switch not in dropout, I2C settings: ISET2 = HI OR LO, PSEL = HI

V reached. Selected input voltage (AC or USB) > 5.1 V

= V(OUT), DPPM loop not active, selected input current limit not

SYS(REG)

AC and USB switches set to OFF if V(OUT) < V

V(OUT) < 1 V, internal resistor connected from USB to OUT 500

V(OUT) < 1 V, internal resistor connected from AC to OUT 500

OVP

BLK(SHBAT)

– V

(BAT)

> V

(OUT)

< 1 V,

= K

BLK(SHBAT)

, 10 mA

BATOUTSH

Internal resistor connected from BAT to AGND1 when battery is not detected by ANLG1

;

IN(DT)

;

IN(NDT)

SUP(DT)

SUP(NDT)

I(OUT) + I(BAT)= 0.5 A 175 190 I(OUT) + I(BAT)= 0.1 A 35 45

INOUTSH

OVP

BATOUTSH

× C

DPPM

capacitor is

DPPM,

190

125

80 100

400 500

0.6 V

Ω

6 6.5 6.8

200 mV

1 ms/nF

1 k Ω

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V(OUT)* 1.2

500 kW

O(BAT)

(SET)

SET

O(PRECHG)

(PRECHG)

(SET)

SET

(TERM)

(SET)

SET

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ELECTRICAL CHARACTERISTICS – POWER PATH AND CHARGE MANAGEMENT (Continued)

Over recommended operating conditions (typical values at TJ= 25 ° C), application circuit as in Figure 3 (unless otherwise noted).

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

POWER PATH TIMING CHARACTERISTICS, DPPM AND THERMAL LOOPS NOT ACTIVE, R

BOOT

SW(ACBAT)

SW(USBBAT)

SW(PSEL)

SW(ACUSB)

Boot-up time Measured from input power detection 120 200 300 ms Switching from AC to BAT 50

Switching from USB to BAT 50 Switching from USB to AC 50

Switching from AC to USB or USB to AC

No USB: measured from V(AC)– V(BAT) < V detected:CE=LO (after CE hold-off time)

No AC: measured from V(USB)– V(BAT) < V detected:CE=LO (after CE hold-off time)

Toggling I2C PSEL bit AC power removed or USB power removed 100

BATTERY REMOVAL DETECTION

NOBATID

DGL(NOBAT)

Battery ID resistor detection ID resistor not detected at V(OUT)– V(ANLG1) < V Deglitch time for battery removal

detection

= 50 k Ω

TMR

, USB

IN(NDT)

,USB

IN(NDT)

NOBATID

0.6 1.2 ms

TPS65800

µ s

0.5 V

Set via I2C bits

O(ANLG1)

ANLG1 pullup current

(BATID1,BATID2) ADC_WAIT register

Total accuracy 25% 25%

FAST CHARGE CURRENT, V(OUT) > V(BAT) + 0.1 V, V(BAT) > V

O(BAT)

SET

PRECHARGE CURRENT, V(OUT) > V(BAT) + 0.1 V, V

O(PRECHG)

PRECHG

LOWV

DGL(PRE)

CHARGE REGULATION VOLTAGE, V(OUT) > V

Charge current range 100 1500 mA

= V(ISET1),

Battery charge current set voltage V

Battery charge current set factor

SET

(ISET1_1, ISET1_0) =

100 mA < I 1 mA < I

< V(BAT) < V

BATSH

Precharge current range 10 150 mA

Precharge set voltage V

PRECHG

Precharge to fast-charge transition Fast charge at V(BAT) > V Deglitch time for fast charge to

precharge transition

Decreasing battery voltage, R

O(BATREG)

+ 0.1V

Voltage options, selection via I2C

O(BATREG)

Battery charge voltage

Accuracy, TA= 25 ° C –0.5% 0.5% Total accuracy –1% 1%

CHARGE TERMINATION, V(BAT) > V

, VOLTAGE REGULATION MODE SET

RCH

00, V

: 2.5 V to 4.4 V

(OUT)

01 10 10 50 11 60

LOWV

11, 100% scaling 2.475 2.500 2.525 10, 75% scaling 1.875 1.900 1.925 01, 50% scaling 1.225 1.250 1.275 00, 25% scaling 0.575 0.600 0.625

≤ 1 A 350 400 450

O(BAT)

≤ 100 mA 100 400 1000

O(BAT)

, t < t

LOWV

(PRECHG)

= V(ISET1) 220 250 270 mV

LOWV

= 50 k Ω 22.5 ms

TMR

2.8 3 3.2 V

4.2

4.356

µ A

TERM

DGL(TERM)

Charge termination current range 10 150 mA

11, 100% scaling 240 260 280

Battery termination detection set V voltage (ISET1_1, SET1_0) =

= V(ISET1),

TERM

10, 75% scaling 145 160 175 01, 50% scaling 90 110 130 00, 25% scaling 40 60 75

Deglitch time for termination detection V(ISET1) < V

, R

TERM

= 50 k Ω 22.5 ms

TMR

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ELECTRICAL CHARACTERISTICS – POWER PATH AND CHARGE MANAGEMENT (Continued)

Over recommended operating conditions (typical values at TJ= 25 ° C), application circuit as in Figure 3 (unless otherwise noted).

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

BATTERY RECHARGE DETECTION

RCH

DGL(RCH)

Recharge threshold voltage 80 100 130 mV Deglitch time for recharge detection R

DPPM FUNCTION

DPPM

O(DPPM)

DPPM

DGL(DPPM)

DPPM regulation point range V DPPM pin current source AC or USB Present 95 100 105 µ A DPPM scaling factor 1.139 1.15 1.162

DPPM de-glitch time 500 µ s

PACK TEMPERATURE SENSING

LTF

HTF

O(TS)

DLG(TFAULT

)

Low-temperture threshold Pack low temperature fault at V(TS) > V High-temperture threshold Pack low temperature fault at V(TS) < V Temperature-sense current source Thermistor bias current 18.8 20 21.2 µ A Deglitch time for temperature fault R(TMR) = 50 k Ω ,

detection V(TS) > V

CHARGE AND PRECHARGE SAFETY TIMER

CHG

TMR

CHGADD

PRECHG

PRE

PCHGADD

TMR

TMR(FLT)

Charge safety timer programmed Safety timer range, thermal/DPPM loop not active, value t

Charge timer set factor 0.313 0.360 0.414 s/ Ω Total elapsed time when DPPM or Fast charge on, t

thermal loop are active t Precharge safety timer programmed Precharge safety timer range, thermal/DPPM loop not active, 18 30 60 min

value t Precharge timer set factor 0.09 0.1 0.11 Total elapsed time when DPPM or Precharge on, t

thermal loop are active t External timer resistor limits 30 100 k Ω

Timer fault recovery pullup resistor 1 k Ω

CHARGER THERMAL SHUTDOWN

THCHG

THCHGHYS

Charger thermal shutdown Charger turned off when TJ> T Charger thermal shutdown hystersis 30

THERMAL REGULATION LOOP

THREG

Temperature regulation limit 115 135

New charge cycle starts if V(BAT) < V termination was detected

= 50 k Ω 22.5 ms

TMR

= R

× K

(DPPM)

DPPM

× I

DPPMM

O(DPPM)

Status bit set indicating DPPM loop active after deglitch time, R

= 50 k Ω

TMR

OR V(TS) < V

LTF

= R

CHG

PRECHG

× K

TMR

CHGADD

= K

× R

PRE

PCHGADD

HTF

is the maximum add-on time added to

× K

TMR

is the maximum add-on time added to

Internal resistor connected from OUT to BAT after safety timer timeout

THCHG

Charge current decreasesd and timer extended when TJ> ° C T

THREG

– V

O(BATREG)

, after

RCH

2.6 4.4 V

LTF HTF

2.465 2.5 2.535

0.485 0.5 0.515

3 5 10 h

2 × t

PRECHG

22.5 ms

CHG

150

° C

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SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ELECTRICAL CHARACTERISTICS – LINEAR REGULATORS

Over recommended operating conditions (typical values at TJ= 25 ° C), application circuit as in Figure 3 (unless otherwise noted).

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

SELECTABLE OUTPUT VOLTAGE LDOS: LDO1, LDO2

= –1 mA 15

Q(LDO12)

O(LDO1,2)

Quiescent current, either LDO1 or LDO2 enabled, LDO0 disabled

Q(LDO12)

Output current range 150 mA

Output voltage, selectable via I2C.

Dropout voltage, 150 mA load 300 mV

O(LDO1,2)

LDO1, LDO2 output voltage Total accuracy, V(VIN_LDO02) = 3.65 V –3% 3%

Line regulation, 100-mA load, V(VIN_LDO02): V

Load regulation, load: 10 mA → 150 mA V(VIN_LDO02) > V

SR(LDO12)

SC(LDO1,2)

DCH(LDO1,2)

LKG(LDO1,2)

SSLDO1,2

SS_DELAYLDO1,2

PSRR at 20 kHz 150-mA load at output, V(VIN_LDO02) – V LDO1&2 short-circuit current limit Output grounded 300 mA Discharge resistor 300 Ω

LDO disabled by I2C command Leakage current LDO off 2 µ A Soft start ramp time 500 µ s Startup delay Measured from the time when the enable bit is set 20 µ s

SIM LINEAR REGULATOR

Q(SIM)

O(SIM)

Quiescent current Internally connected to OUT pin 20 µ A Output current range 8 mA

Output voltage, selectable via I2C.

Dropout voltage, 8-mA load 0.2

O(SIM)

SIM LDO output voltage

Total accuracy, V(OUT): 3.2 V to 4.7 V, 8 mA –5% 5%

Load regulation, load: 1 mA → 8 mA,

V(OUT) > V

Line regulation, 5 mA load, V(OUT):

O(SIM) TYP

SC(SIM)

LKG(SIM)

Short Circuit current limit Output grounded 20 mA Leakage current LDO off 1 µ A

PROGRAMMABLE OUTPUT VOLTAGE LDO’S: LDO3, LDO4, LDO5

Q(LDO35)

O(LDO35)

Quiescent current, only one of LDO3, LDO4, LDO5 is enabled

Q(LDO35)

Output current range 100 mA

Output voltage, selectable via I2C

Dropout voltage, 100-mA load 240 mV

O(LDO35)

LDO3, LDO4, LDO5 output Total accuracy, 100-mA load V voltage

Load regulation,

V(VIN_LDO35) > V

0.5 V

Line regulation, 10 mA load,

V(VIN_LDO35): V

SC(LDO35)

PSR

(LDO35)

DCH(LDO35)

LKG(LDO35)

SSLDO3,5

SS_DELAYLDO3,5

Short-circuit current limit Output grounded 250 mA PSRR at 10 kHz V(VIN_LDO35) > V Discharge resistor 400 Ω

LDO is disabled by I2C command Leakage current LDO off 1 µ A Soft-start ramp time 120 µ s Startup delay Measured from the time when the enable bit is set 70 µ s

= I(VIN_LDO02) µ A

(LDO1,2)TYP

O(LDO1,2) TYP

O(SIM) TYP

+ 0.5 V

+ 0.5 V → 4.7 V

= I(VIN_LDO35) 70 µ A

O(LDO35)TYP

O(LDO3,5)

(LDO1,2)

= –150 mA 160

(LDO1,2)

Available output voltages:

O(LDO1,2)

2.5, 2.85, 3, 3.2, 3.3

+ 0.5 V → 4.7 V

+ 0.5 V

= 1 V 40 dB

O(LDO1,2)

–1% 1%

–1.5% 1.5%

Available output voltages:

O(SIM)TYP

–3% 3%

–2% 2%

Available output voltages:

O(LDO35)TYP

4.46 V, 25 mV steps

(VIN_LDO35)

= 5 V –3% 3%

+ Load: 1 mA → 50 mA –1% 1%

+ 0.5 V → 4.7 V

–1% 1%

+1 V, 50-mA load at output 40 dB

TPS65800

TYP = 1.25, 1.5, 1.8, V

= 1.8 or 3

= 1.224 V to V

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ELECTRICAL CHARACTERISTICS – LINEAR REGULATORS (continued)

Over recommended operating conditions (typical values at TJ= 25 ° C), application circuit as in Figure 3 (unless otherwise noted).

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

RTC_OUT LINEAR REGULATOR

Q(RTC_OUT)

O(RTC_OUT)

SH(RTC_OUT)

LKG(RTC_OUT)

LDO0 LINEAR REGULATOR

Q(LDO0)

O(LDO0)

PSR I

SC(LDO0)

LKG(LDO0)

SSLDO0

SS_DELAYLDO0

LDO_PM LINEAR REGULATOR

Q(LD0_PM)

O(LDO_PM)

LKG(LDOPM)

(LDO0)

Quiescent current for RTC LDO Internally connected to OUT pin 20 µ A Output current range 8 mA

Fixed output voltage value 3.1 V Dropout voltage, I(RTC_OUT) = –8 mA 200 mV

RTC_OUT output voltage sleep mode not set

Total accuracy, V(OUT): 2 V to 4.7 V, 8-mA load,

–5% 5%

Load regulation, load: 1 mA → 8 mA, 2 V < V(OUT) < 4.7 V –3% 3% Line regulation, 5-mA load,

V(OUT): 2 V → 4.7 V

–2% 2%

Short circuit current limit V(RTC_OUT) = 0 V 20 mA

Leakage current nA

Quiescent current µ A

V(RTC_OUT) = 1.5 V, V(OUT) = 0 V

Internally connected to VIN_LDO12 pin

TJ= 85 ° C 880 TJ= 25 ° C 250

I(LDO0) = –1 mA 15 I(LDO0) = –150 mA 160

Output current range 150 mA

Fixed output voltage value 3.3 V Dropout voltage, I(LDO0) = –150 mA 300 mV

Output voltage

Total accuracy –3% 3% Line regulation, V(OUT): V

I(LDO0) =– 100 mA

O(LDO0)

+ 0.5 → 4.7 V,

–1% 1%

Load regulation, I(LDO0) = –10 mA → – 150 mA –1.5% 1.5%

PSRR at 20 kHz 150 mA load at output, V(VIN_LDO12) – V

= 1 V 40 dB

O(LDO1,2)

Short-circuit current limit V(LDO0) = 0 V 300 mA Leakage current LDO off 1 µ A Soft start ramp time 500 µ s Startup delay Measured from the time when the enable bit is set 20 µ s

Output current range 20 mA

Fixed output voltage value, V(OUT) > 4 V 3.3

Output voltage Dropout voltage, I(LDOPM) = –12 mA 0.5 0.7

Total accuracy –5% 5%

Leakage current LDO off 1 µ A

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SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ELECTRICAL CHARACTERISTICS – SWITCHED MODE SM1 STEP DOWN CONVERTER

Over recommended operating conditions (typical values at TJ= 25 ° C), V (unless otherwise noted).

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

= I(VIN_ SM1), no output load, not switching 10 20

Q(SM1)

O(SM1)

DSON(PSM1)

LKG(PSM1)

DSON(NSM1)

LKG(PSM1)

LIM(SM1)

S(SM1)

EFF

(SM1)

SS(SM1)

DLY(SM1)

Quiescent current for SM1 µ A

Output current range 600 mA

Output voltage, PWM mode

P-channel MOSFET on-resistance

P-channel leakage current 0.1 µ A N-channel MOSFET

on-resistance N-channel leakage current 5 µ A P- and N-channel current limit 3 V < V(VIN_SM1) < 4.7 V 900 1050 1200 mA Oscillator frequency PWM mode set 1.3 1.5 1.7 MHz

Efficiency 90%

Soft start ramp time 750

Converter turn-on delay 170

Q(SM1)

SM1 OFF, set via I2C 0.1

Output voltage, selectable via I2C, standby OFF 0.6 V to 1.8 V,

= V

O(SM1)

Total accuracy, V V(VIN_SM1) = 3 V to 4.7 V; 0 mA ≤ I

, output voltage range, standby ON 0.6 V to 1.8 V,

SBY(SM1)

O(SM1)TYP

Line regulation, V(VIN_SM1): 3 → 4.7 V, %/V I

= 10 mA

O(SM1)

Load regulation, V(VIN_SM1) = 4.7 V, I

: 60 mA → 540 mA

O(SM1)

V(VIN_SM1) = 3.6 V, 100% duty cycle set 310 500 m Ω

V(VIN_SM1) = 3.6 V, 0% duty cycle set 220 330 m Ω

V(VIN_SM1) = 4.2 V, PWM mode, I V

= 3 V

O(SM1)

Converter OFF → ON, V value

O(SM1)

GPIO1 pin programmed as SM1 converter enable control. Measured from V(GPIO1): LO → HI

O(SM1)

= V

SBY(SM1)

: 5% → 95% of target

O(SM1)

TPS65800

= 1.24 V, application circuit as in Figure 3

Available output

= 1.24 V,

= 300 mA,

≤ 600 mA

voltages: V

adjustable in 40-mV

steps

Available output

voltages: V

adjustable in 40-mV

steps

–3% 3%

O(SM1)TYP

SBY(SM1)

0.027

0.139 %/A

µ s

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ELECTRICAL CHARACTERISTICS – SWITCHED MODE SM2 STEP DOWN CONVERTER

Over recommended operating conditions (typical values at TJ= 25 ° C), V (unless otherwise noted).

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

= I(VIN_ SM2), no output load, not switching 10 20

Q(SM2)

O(SM2)

DSON(PSM2)

LKG(PSM2)

DSON(NSM2)

LKG(PSM2)

LIM(SM2)

S(SM2)

EFF

(SM2)

SS(SM2)

DLY(SM2)

Quiescent current for SM2 µ A

Output current range 600 mA

Output voltage

P-channel MOSFET on-resistance

P-channel leakage current 0.1 µ A N-channel MOSFET

on-resistance N-channel leakage current 5 µ A P- and N- channel current limit 3 V < V(VIN_SM2) < 4.7 V 900 1050 1200 mA Oscillator frequency PWM mode set 1.3 1.5 1.7 MHz

Efficiency 92%

Soft start ramp time 750

Converter turn-on delay 170

Q(SM2)

SM2 OFF, set via I2C 0.1

Output voltage, selectable via I2C, standby OFF

= V

O(SM2)

ON V to 3.4 V, adjustable in

Total accuracy, V V(VIN_SM2) = greater of [3 V or (V to 4.7 V; 0 mA ≤ I

, output voltage range, standby voltages: V

SBY(SM2)

O(SM2)TYP

O(SM2)

Line regulation, V(VIN_SM2) = greater of %/V [3 V or (V to 4.7 V; 0 mA ≤ I

+ 0.3 V)] 0.027

O(SM2)

Load regulation, V(VIN_SM2) = 4.7 V, I

: 60 mA → 540 mA

O(SM2)

V(VIN_SM2) = 3.6 V, 100% duty cycle set 310 500 m Ω

V(VIN_SM2) = 3.6 V, 0% duty cycle set 220 330 m Ω

V(VIN_SM2) = 4.2 V, I V

= 3 V

O(SM2)

Converter OFF → ON, V value

GPIO2 pin programmed as SM2 converter enable control. Measured from V(GPIO2): LO → HI

≤ 600 mA

O(SM2)

O(SM1)

= V

SM2(SBY)

= 300 mA,

: 5% → 95% of target

= 1.24 V, application circuit as in Figure 3

Available output voltages: V V to 3.4 V, adjustable in

= 1.8 V,

+ 0.3 V)] –3% 3%

O(SM2)

O(SM2)TYP

80 mV steps

Available output

SBY(SM2)

80-mV steps

0.139 %/A

= 1

µ s

ELECTRICAL CHARACTERISTICS – GPIOs

Over recommended operating conditions (typical values at TJ= 25 ° C), application circuit as in Figure 3 (unless otherwise noted).

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

GPIO1–3

OGPIO

LKG(GPIO)

Low level output voltage GPIO0 IOL= 20 mA 0.5 V Low level sink current into GPIO1, 2, 3 V(GPIOn) = V(OUT) 20 mA Low level input voltage 0.4 V Input leakage current V(GPIOn) = V(OUT) 1 µ A

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ELECTRICAL CHARACTERISTICS – ADC

Over recommended operating conditions (typical values at TJ= 25 ° C), V(ADC_REF) =2.535v if external reference voltage is used,application circuit as in Figure 3 (unless otherwise noted).

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

ANALOG INPUTS

RNG(CH1_5)

RNG(CH6_8)

IN(ADC)

INADC(CH1_5)

LKGADC(CH1_5)

INADC(CH6_8)

LKGADC(CH6_8)

CH5(ADC)

DC ACCURACY

RES

(ADC)

MCD

(ADC)

INL

(ADC)

DNL

(ADC)

OFF

ZERO(ADC)

OFF

CH(ADC)

GAIN

ADC

GAIN

CH(ADC)

THROUGHPUT SPEED

ADC

CLK

ADC

TCONV

REFERENCE VOLTAGES

INTREF

SHRT(INTREF)

REF(DRIFT)

Q(ADC)

(ANLG2)

Full-scale input range, Ch1 to V(ADC_ Ch5 REF)

Full-scale input range, Ch6 to V Ch8 × 1.854

Positive inputs (active clamp), full scale ~ 2.535 V 0

Positive inputs (active clamp), full scale ~4.7 V 0

INTREF

Input capacitance (all channels) 15 pF Input resistance (Ch1 to Ch5) 1 M Ω Leakage current (Ch1 to Ch5) 100 nA Input resistance (Ch6 to Ch8) 430 540 k Ω Leakage current (Ch6 to Ch8) 10 µ A

1.89 5

Internal voltage proportional to junction temperature

TJ= 25 ° C, ADC channel 5 input voltage V

Temperature coefficient 6.5

Resolution SAR ADC 10 Bits No missing codes SPECIFIED Integral linearity error ± 3 LSB Differential non-linearity error ± 1 LSB

Offset error 5 LSB Offset error match between

channels Gain error ± 8 LSB

Difference between the first code transition (00...00 to 00...001) and the ideal AGND + 1 LSB

5 LSB

Deviation in code from the ideal full scale code (11 … 111) for the full scale voltage

Gain error match Any two channels 2 LSB

Sampling clock 650 750 850 kHz Conversion time 44 59 68 µ s

Internal ADC reference voltage 2.53 2.54 V Internal reference short circuit V(ADC_REF)= AGND1, internal reference enabled

limit via I2C ADC internal reference ppm/ °

temperature drift C ADC Internal reference Measured at OUT pin (internal reference) or

quiescent current ADC_REF pin (external reference)

Sampling, convertion and setting Rs ≤ 200 K for Ch1, Ch2, Ch3; Rs ≤ 500 Ω for Ch6, Ch7, Ch8

TA= 25 ° C, V(ADC_REF)=V ADC reference is selected 5

when internal 2.53

INTREF

6 mA

50 100

40 µ A

00 0

ANLG2 pin internal pullup current source

ADC channel 2 bias current, set via I2C register ADC_WAIT bits µ A (ADC_CH2I_D1_1, ADC_CH2I _D2)

01 10 10 50 11 60

Total accuracy, relative to selected value –25% 25%

mV/

° C

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V(OUT)* 1.2

500 kW

O(SM3)

V(SM3REF)

FB3

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ELECTRICAL CHARACTERISTICS – ADC (continued)

Over recommended operating conditions (typical values at TJ= 25 ° C), V(ADC_REF) =2.535v if external reference voltage is used,application circuit as in Figure 3 (unless otherwise noted).

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

00 µ A

(ANLG1)

ANLG1 pin internal pullup current source

INTERNAL REFERENCE POWER CONSUMPTION

ACTIVE

ARMED

Power dissipation Conversion active 2.3 mW Power dissipation Not converting 0.43 mW

TRIGGER TIMING CHARACTERISTICS

DELAY(TRG)

WAIT(TRG)

Trigger delay time accuracy Time range, set via I2C register ADC_DELAY 0 750 µ S

Trigger wait time accuracy Time range, set via I2C register ADC_WAIT 0 20.48 mS

ADC channel 1 bias current, set via I2C register ADC_WAIT bits (BATIDI_D1, BATIDI _D2)

Total accuracy 10% 10%

Relative to typical value set via I2C –20% 20%

01 10 10 50 11 60

ELECTRICAL CHARACTERISTICS – LED AND PWM DRIVERS

Over recommended operating conditions (typical values at TJ= 25 ° C), application circuit as in Figure 3 (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

SM3 BOOST CONVERTER, WHITE LED CONSTANT-CURRENT DRIVER

VIN(SM3)

OVP3

HYS(OVP3)

SM3REF

O(SM3)

SM3SW

REP_SM3

DSON(SM3SW)

LKG(SM3SW)

DSON(L3)

LKG(L3)

MAX(L3)

PWM DRIVER, PWM OPEN DRAIN OUTPUT

OL(PWM)

PWM

RISE_PWM

Input Voltage range V(OUT) = 3.3 V 3 4.7 V Output overvoltage trip OVP detected at V(SM3) > V Output overvoltage hysteresis OVP not detected at V(SM3) < V

LED current sense threshold 244 252 260 mV

LED current

LED current below regulation point at V(FB3) < V

SM3REF

Current range, Vin = 3.3 V, Total accuracy, I

O(SM3)

OVP3

– V

OVP3

HYS(OVP3)

= 10mA –10% 10%

LED switch duty cycle Duty cycle range via I2C, 256 steps 0.4% --

LED switch duty cycle pattern 256 pulses within repetition repetition rate rate time

LED switch MOSFET on-resistance

V(OUT) = 3.6 V; I(SM3SW) = 20 mA 1 2 Ω

SM3_LF_OSC = 0 122 SM3_LF_OSC = 1 183

26.5 29 30 V

0.5 25 mA

SM3SW

LED switch MOSFET leakage 1 µ A Power stage MOSFET

on-resistance

V(OUT) = 3.6 V; I(L3) = 200 mA 300 600 m Ω

Power stage MOSFET leakage 1 µ A Power stage MOSFET current

limit

3 V < V(OUT) < 4.7 V 400 500 600 mA

Low level output voltage I(PWM) = 150 mA 0.5 V

Set via I2C, f

0.5/1/1.5/2/3/4.5/7.8/15.6

PWM driver frequency

Frequency range Hz Total accuracy, relative to selected value – 20% 20%

Rise time PWM voltage I

= 150 mA 0.2 1 2.8 µ s

OL_PWM

1.8 V

= 0% to 99.6%, set

minimum step

PWM

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SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ELECTRICAL CHARACTERISTICS – LED AND PWM DRIVERS (continued)

Over recommended operating conditions (typical values at TJ= 25 ° C), application circuit as in Figure 3 (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

FALL_PWM

PWM

LED_PWM DRIVER, LED_PWM OPEN DRAIN OUTPUT

LEDPWM

REP(LEDPWM)

OL(LEDPWM)

OH(LEDPWM)

RISE_LEDPWM

FALL_LEDPWM

RGB DRIVER, RED/GREEN/BLUE OPEN DRAIN OUTPUTS

FLASH(RGB)

FLASH(ON)

RGB

SINK(RGB)

OL(RGB)

LKG(RGB)

RISE_RGB

FALL_RGB

Fall time PWM voltage I

PWM driver duty cycle Duty cycle range set via I2C, --

= 150 mA 0.2 1 2.8 µ s

OL_PWM

PWM

6.25% minimum step

LED_PWM driver duty cycle Duty cycle range set via I2C, 256 steps

LEDPWM

0.4% minimum step

LED_PWM driver duty cycle 256 pulses within repetition pattern repetition rate rate time

SM3_LF_OSC = 0 122

SM3_LF_OSC = 1 180 Low level output voltage I(LED_PWM) = 150 mA 0.5 V High level output voltage 6 V Rise time PWM voltage I Fall time PWM voltage I

Flashing period

OL_LEDPWM OL_LEDPWM

Flashing period range via I2C, 0.5 s minimum s

= 150 mA 0.2 1 2.8 µ s = 150 mA 0.2 1 2.8 µ s

FLASH(RGB)

step, 8 steps

Total accuracy –20% 20%

Set via I2C, t

Flash on time

Flash on time range, value selectable by I2C 0.1/0.15/0.2/0.25/0.3/0.4/ s

Total accuracy, relative to selected value – 20% 20%

= 0% to 99.98%, set

Duty cycle Duty cycle range, value selectable via I2C via I2C, 3.23% minimum

RGB

00 = (Driver set to

RGB output sink current V(BLUE) = 2 V, set via I2C mA

V(RED) = V(GREEN) = RGB_ISET1,0

OFF)

01 2.4 4 5.6

10 4.8 8 11.2

11 7 12 16.6 Low level output voltage 0.3 V

Output off leakage current 1 µ A

Output low voltage, 8 mA load, RED/GREEN/BLUE PINS

V(RED)=V(GREEN)=V(BLUE) = 4.7 V, all drivers

disabled Voltage rise time 8-mA load 2 5 8 µ s Voltage fall time 8-mA load 2.4 5 8 µ s

= 6.25% to 100%,

= 0% to 99.6%,

= 1 to 8 s, set

0.5/0.6 s

step

TPS65800

FLASH(ON)

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SYS_IN

SM1

PGND1

PGND2

SM2

AGND0

SM3

FB3

SM3SW

OUT

SIM

OUT

GPIO1

USB

GPIO2

LDO_PM

PWM

RED

BA T

GREEN

BA T

BLUE

TMR

SCLK

ISET1

SDA T

DPPM

INT

RESPWRON

R TC_OUT

TRSTPWON

HOT_RST

LDO1

LDO0

LDO3

LDO35_REF

VIN_LDO35

LDO4

ADC_REF

AGND2

ANLG1

ANLG2

LDO5

GPIO3

GROUNDPAD

AGND1

VIN_LDO02

PGND3

VIN_SM2

VIN_SM1

25 282624232219 21201817

LED_PWM

LDO2

48 47 434446 4549505154 5256 5355

1615

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

PIN ASSIGNMENT

PIN DESCRIPTION, REQUIRED EXTERNAL COMPONENTS

NAME PIN I/O DESCRIPTION EXTERNAL REQUIRED COMPONENTS

AC 7 I Adapter charge input voltage, connect to 1- µ F (minimum) capacitor to AGND1 pin to minimize

AC_DC adapter positive output terminal overvoltage transients during AC power hot-plug events. (dc voltage)

ADC_REF 22 I/O ADC internal reference filter or ADC 4.7- µ F (minimum) to 10- µ F (maximum) capacitor connected to

external reference input AGND2 pin AGND0 16 – Analog ground connection Connect to analog ground plane AGND1 48 – Analog ground pin Connect to analog ground plane AGND2 25 – Analog ground pin Connect to analog ground plane ANLG1 24 I Analog input to ADC, programmable Can be used to monitor additional system or pack parameters

current source output ANLG2 23 I Analog input to ADC, programmable Can be used to monitor additional system or pack parameters

current source output BAT 17, I/O Battery power Connect to battery positive terminal. Connect 10- µ F capacitor

18 (minimum) from BAT pin to AGND1 pin.

BLUE 1 O Programmable blue driver, open-drain Connect to BLUE input of RGB LED

DPPM 14 I Dynamic power path management External resistor from DPPM pin to AGND1 pin sets the DPPM

FB3 41 I/O White LED duty cycle switch output, LED External resistor from FB3 pin to PGND3 pin sets LED peak

GPIO1 43 I/O General purpose programmable I/O Example: External Interrupt request to host ( INT:HI → LO) GPIO2 53 I/O General purpose programmable I/O I/O Example: Set SM1 and SM2 converters in standby mode GPIO3 54 I/O General purpose programmable I/O Example: ADC conversion start trigger GREEN 56 O Programmable LED driver, open drain Connect to GREEN input of RGB LED

output, current sink output when active.

to AGND1 sets BAT to OUT short-circuit blanking delay when battery is hot-plugged into system.

pin.

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set-point regulation threshold. 1-nF (minimum) capacitor to from DPPM

current setting current. Connect 100-pF (minimum) filter capacitor to PGND3

output, current sink output when active.

(SEE APPLICATION DIAGRAM)

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

PIN ASSIGNMENT (continued)

NAME PIN I/O DESCRIPTION EXTERNAL REQUIRED COMPONENTS

HOT_RST 15 I/O Hardware reset input, reset generated Connect to an external push-button switch

when connected to ground INT 19 O Interruption pin, open-drain output Connect 100-k Ω external pullup resistor between INT and OUT

INT pin is LO when interrupt is requested by TPS65800.

ISET1 11 I Current set point when charging in auto External resistor from ISET1 pin to AGND1 pin sets charge

mode with AC selected. Precharge and current value

charge termination set point for all charge

modes L1 46 O SM1 synchronous buck converter power 3.3- µ H inductor to SM1 pin

stage output L2 51 O SM2 synchronous buck converter power 3.3- µ H inductor to SM2 pin

stage output L3 39 O Drain of the integrated boost power stage 4.7- µ H inductor to OUT pin, external Schottky diode to SM3

switch pin LDO0 32 O LDO0 output, fixed voltage 1- µ F (minimum) capacitor to AGND1 LDO1 37 O LDO1 output 1- µ F (minimum) capacitor to AGND1 LDO2 33 O LDO2 output 1- µ F (minimum) capacitor to AGND1 LDO3 28 O LDO3 output 2.2- µ F (minimum) capacitor to AGND2 LDO4 27 O LDO4 output 2.2- µ F (minimum) capacitor to AGND2 LDO35_REF 30 I Linear regulators LDO3–5 reference filter 100-nF capacitor to AGND2 LDO5 26 O LDO5 output 2.2- µ F (minimum) capacitor to AGND2 LDO_PM 10 O General-purpose LDO output 1- µ F (minimum) capacitor to AGND1 pin LED_PWM 36 O PWM driver output, open-drain Can be used to drive a keyboard backlight LED OUT 8, 9 O Power path output. Connect to system 10- µ F capacitor to AGND1 pin

main power rail (system power bus) PGND1 45 – SM1 synchronous buck converter power Connect to power ground plane

ground PGND2 52 – SM1 synchronous buck converter power Connect to power ground plane

ground PGND3 38 – White LED driver power ground input. Connect to a power ground plane PWM 34 O PWM driver output, open-drain Can be used to drive a vibrator or other external functions RED 55 O Programmable LED driver, open drain Connect to RED input of RGB LED

output, current sink output when active. RESPWRON 21 O System reset, open-drain output 100-k Ω external pullup resistor to OUT. RESPWRON pin is LO

when TPS65800 is resetting the system.

RTC_OUT 4 O Low-leakage LDO output. Can be 1- µ F (minimum) capacitor to AGND1 pin or supercapacitor

connected to a super-capacitor or

secondary cell, if used as a RTC backup

output. SCLK 2 I I2C interface clock line 2-k Ω pullup resistor to OUT pin SDAT 3 I/O I2C interface data line 2-k Ω pullup resistor to OUT pin SIM 5 O General-purpose LDO output 1- µ F (minimum) capacitor to AGND1 pin SM1 44 I SM1 synchronous buck converter output LC filter: 10- µ F capacitor to PGND1 pin

voltage sense SM2 49 I SM2 synchronous buck converter output LC filter: 10- µ F capacitor to PGND2 pin

voltage sense SM3 42 I White LED driver output overvoltage Connect 1- µ F capacitor to PGND3 pin. Connect SM3 pin to

detection the positive side of white LED ladder. SM3SW 40 I Integrated white LED duty cycle switch Connect to negative side of external LED ladder

input SYS_IN 31 I System power bus low-voltage detection External resistive divider sets minimum system operational

voltage. TPS65800 enters sleep mode when voltage below minimum system voltage threshold is detected. 1 nF filter capacitor to AGND1 recommended.

(SEE APPLICATION DIAGRAM)

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

PIN ASSIGNMENT (continued)

NAME PIN I/O DESCRIPTION EXTERNAL REQUIRED COMPONENTS

TMR 13 I Charge safety timer program input External resistor from TMR pin to AGND1 pin sets the charge

safety timer time-out value.

TRSTPWON 20 I System reset pulse duration setting 100-nF (minimum) capacitor to AGND1. External capacitor

from TRSTPWON pin to AGND1 pin sets RESPWRON pulse duration

TS 12 I/O Temperature sense input, current source Connect to battery pack thermistor to sense battery pack

output temperature USB 6 I USB charge input voltage, connect to 1- µ F (minimum) capacitor to AGND1 pin, to minimize

USB port positive power output overvoltage transients during USB power hot-plug events. VIN_LDO35 29 – Input to LDOs 3 to 5 1- µ F (minimum) decoupling capacitor to AGND2 VIN_LDO02 35 – Positive supply input for LDO0, LDO1, 1- µ F (minimum) decoupling capacitor to AGND1

LDO2 VIN_SM1 47 – SM1 synchronous buck converter positive 10- µ F capacitor to PGND1 pin

supply input VIN_SM2 50 – SM2 synchronous buck converter positive 10- µ F capacitor to PGND2 pin

supply input Exposed 57 – There is an internal electrical connection between the exposed thermal pad and AGNDn pins of the IC.

thermal pad The exposed thermal pad must be connected to the same potential as the AGND1 pin on the printed

circuit board. Do not use the thermal pad as the primary ground input for the IC. AGNDn pins must be

connected to a clean ground plane at all times.

(SEE APPLICATION DIAGRAM)

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SM1

BAT

OUT

USB

TMR

DPPM

HOT_RST

SM2

SM3

SM3SW

BAT

OUT

Battery

PGND1

PGND2

PGND3

FB3

VIN_SM2

VIN_SM1

PWM

LED_PWM

RED

BLUE

GREEN

AGND1

VIN_LDO02

LDO1

LDO0

LDO2

TRSTPWON

SYS_IN

TPS65800

INT

SDAT

SCLK

RESPWRON

AGND2

EXTERNAL HOST

GPIO2

GPIO1

ANLG1

GPIO3

ANLG2

ADC_REF

VIN_LDO35

LDO35_REF

LDO4

LDO3

LDO5

1uF

2.2uF

0.1uF

1nF

210K

100K

AC_DC

ADAPTER

OUTPUT

USB

POWER

GND

100K

VLDO2

VLDO1

VLDO0

VLDO5

VLDO4

VLDO3

VSM2

VSM1

GND

49.9K

37.4K

100pF

GND

A1 A2 A3

P1 P2

SIM

RTC_OUT

AGND0

VRTC_OUT

ISET1

Supercap

LDO_PM

SIM

35 10

2.2uF

1uF

4.7uF

0.1uF

1uF

10uF

2.2uF

1uF

100pF

4.7uH

10uF

3.3uH

47nF

10uF

22uF

0.22uF

4.7uF

SYSTEM POWER

BUS

ADC

EXTERNAL

ANALOG

INPUTS

I2C

CONFIGURABLE

GPIO’S

CLOCK

DATA

ALARM

RESET

NOTES:

1) RESISTORVALUESINOHMS

2) THEFOLLOWINGPARAMETERSAREPROGRAMMED :

- R

TMR

=49.9K: 6 HOURCHARGESAFETY TIMER,

30 MINPRE-CHARGESAFETY TIMER

- R

SET

=1K: 1A CHARGECURRENT (NOSCALING, INPUTLIMIT=2 .5A),

100mA TERMINATION ANDPRE -CHARGECURRENTS

- R

FB3

=10 OHMS: 25mA WHITELEDCURRENT

- C

TRSTPWON

=100nF : 100mSECRESETPULSEWIDTH

- R

DPPM

=37.4K: V

(DPPM)

=4.3V

3) THECAPACITORVALUESSHOWNINTHE APPLICATIONDIAGRAM MAY BELARGERTHANTHEMINIMUMREQUIREDVALUESINDICATED INTHEPINDESCRIPITONTABLE

4) THEVALUESSHOWNINTHE APPLICATIONDIAGRAMMATCHTHE COMPONENTVALUESUSEDINTHEHPA129 EVM, SEEDESIGNNOTES SECTIONFORCOMPONENTSELECTIONDETAILS

VOUT

EXTERNAL

PERIPHERALS

VOUT

WHITELEDS

VOUT

PWRGND

SET

TMR

DPPM

TRSTPWON

C6 C7

C10

C11

C12

C13

C14

C15

C16

C17

C18

C19

C28 1uF

C21

C22

C23

C24

C25

C26

FB3

LSM1

LSM2

LSM3

C27

RGBLED

APPLICATION DIAGRAM

Figure 3. TPS65800 Application Diagram, Recommended External Components

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TPS65800

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BAT

USB

OUT

BAT

USB=5V, BAT =3.3V

BAT

OUT

BAT

AC=5V, BAT =3.3V

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

TYPICAL CHARACTERISTICS – POWER PATH MANAGEMENT

Measured with application circuit shown in Figure 3 , unless otherwise noted

SWITCHING FROM AC TO BATTERY SWITCHING FROM USB TO BATTERY

ON AC REMOVAL ON AC REMOVAL

Figure 4. Figure 5.

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0.05

0.1

0.15

0.2

0.25

0 20 40 60 80 100 120 140

LineRegulation-%

VIN_LDO02=3.8Vto4.7V, Load=10mA, C (LDO02)=1 FOm

T -JunctionTemperature-°C

VIN_LDO02=3.65V, Load=10mA to150mA, C (LDO02)=1 FOm

-0.850

-0.800

-0.750

-0.700

-0.650

-0.600

-0.550

-0.500

0 20 40 60 80 100 120 140

T -JunctionTemperature-°C

LoadRegulation-%

VIN_LDO02=3.3V, Load=150mA,C =1 F

O(LDO02)

100

110

120

130

140

0 20 40 60 80 100 120 140

DropoutVoltage-mV

T -JunctionTemperature-°C

VIN_LDO02=3.65V,Load=10mA, V =3.3V,

O(LDO 0)

V =1.225V

O(LDO 1,2)

1.5

2.5

3.5

0 20 40 60 80 100 120 140

-OutputVoltage-V

LDO0

LDO1

LDO2

T -JunctionTemperature-°C

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

TYPICAL CHARACTERISTICS – LINEAR REGULATORS 0, 1, 2

Measured with application circuit shown in Figure 3 , unless otherwise noted

TPS65800

LOAD REGULATION LINE REGULATION

vs vs

JUNCTION TEMPERATURE JUNCTION TEMPERATURE

Figure 6. Figure 7.

OUTPUT VOLTAGE DROPOUT VOLTAGE

vs vs

JUNCTION TEMPERATURE JUNCTION TEMPERATURE

Figure 8. Figure 9.

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VIN_LDO35=3V, Load=10mA to150mA, C =1 F

O(LDO 35)

-1

-0.95

-0.90

-0.85

-0.80

-0.75

-0.70

-0.65

-0.6

-0.55

-0.5

0 20 40 60 80 100 120 140

LoadRegulation-%

T -JunctionTemperature-°C

-0.018

-0.017

-0.016

-0.015

-0.014

-0.013

-0.012

-0.011

-0.010

0 20 40 60 80 100 120 140

LineRegulation-%

VIN_LDO35=3.3Vto4.7V, Load=100mA, C (LDO35)=1 FOm

T -JunctionTemperature-°C

1.2285

1.229

1.2295

1.23

1.2305

1.231

1.2315

1.232

1.2325

40 60 80

100 120 140

VIN_LDO35=4.7V, Load=10mA, V (LDO35)=1.228V,

C (LDO35)=1 F

T -JunctionTemperature-°C

V -OutputVoltage-V

100

110

120

130

140

0 20 40 60 80 100 120 140

Dropout-mV

VIN_LDO35=3.3V, Load=150mA, C (LDO35)=1 FOm

T -JunctionTemperature-°C

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

TYPICAL CHARACTERISTICS – LINEAR REGULATORS 3, 4, 5

Measured with application circuit shown in Figure 3 , unless otherwise noted

LOAD REGULATION LINE REGULATION

vs vs

JUNCTION TEMPERATURE JUNCTION TEMPERATURE

Figure 10. Figure 11.

OUTPUT VOLTAGE DROPOUT VOLTAGE

vs vs

JUNCTION TEMPERATURE JUNCTION TEMPERATURE

Figure 12. Figure 13.

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TYPICAL CHARACTERISTICS – SM1 AND SM2 BUCK CONVERTERS

100

0 0.1 0.2 0.3 0.4 0.5 0.6

I -OutputCurrent- A

Efficiency-%

VIN_SM1=4V, V (SM1)=1.24V,

L =3.3 H, C (SM1)=10 F

0 0.1 0.2 0.3

0.4

0.5 0.6 0.7

I -OutputCurrent- A

Efficiency-%

VIN_SM2=4.6V, VO(SM2)=1.8V, L =3.3 H. C (SM2)=10 FOm

AC=5V, VIN_SM2=4.6V, V (SM2=1.8V

I (SM2) L =3.3mF,

C (SM2)=10 F

AC=5V, VIN_SM2=4.6V, V (SM2=1.8V

I (SM2) L =3.3mF,

C (SM2)=10 F

Measured with application circuit shown in Figure 3 , unless otherwise noted

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

EFFICIENCY IN AUTOMATIC EFFICIENCY

PWM/PFM MODE vs OUTPUT CURRENT

Figure 14. Figure 15.

PFM OPERATION PFM LOW RIPPLE OPERATION

PWM MODE

Figure 16. Figure 17.

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VIN_SM2

VO(SM2)

AC=5V,VIN_SM2=3V(DC)+1V(AC), V (SM2)=1.8V,I (SM2)=100mA,

L =3.3 F,C (SM1)=10 F, CH1=VIN_SM2,CH2=V (SM2)

O O

m m

VO_SM2

I (SM2)

AC=5V, VIN_SM2=4V, V (SM2)=1.8V,

I (SM2)=0mA to600mA,

L =3.3 F,C (SM1)=10 F, CH1=VO_SM2, CH3=I (SM2)

m m

SM2Voltage

SM2Current

AC=5V, VIN_SM2/SM2=4V, V (SM2)=1.8V,

I (SM2)=600mA,

L =3.3 F, C (SM1)=10 F

SM1Voltage

SM1Current

AC=5V, VIN_SM2/SM2=4V, V (SM2)=1.8V,

I (SM2)=600mA,

L =3.3 F, C (SM1)=10 F

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

TYPICAL CHARACTERISTICS – DRIVERS

Measured with application circuit shown in Figure 3 , unless otherwise noted

LINE TRANSIENT LOAD TRANSIENT

Figure 18. Figure 19.

TRANSIENT - SM1 STARTUP TRANSIENT - SM2 STARTUP

Figure 20. Figure 21.

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BAT =4V, DC=0% L3=4.7 F, C (SM3)=10 F,

CH1=L3, CH4=SM3

BAT =4V,DC=0% L3=4.7 F,C (SM3)=10 F,

CH1=L3,CH4=SM3

m m

TYPICAL CHARACTERISTICS – DRIVERS (continued)

Measured with application circuit shown in Figure 3 , unless otherwise noted

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

SM3 WHITE LED DRIVER vs

SM3 LED CURRENT

SOFT START PWM DUTY CYCLE

Figure 22. Figure 23.

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

SERIAL INTERFACE

Overview

The TPS65800 is compatible with a host-controlled environment, with internal parameters and status information accessible via an I2C interface. An I2C communication port provides a simple way for an I2C compatible host to access system status information and reset fault modes, functioning as a SLAVE port enabling I2C compatible hosts to WRITE to or to READ from internal registers. The TPS65800 I2C port is a 2-wire bidirectional interface using SCL (clock) and SDA (data) pins; the SDA pin is open drain and requires an external pullup. The I2C is designed to operate at SCL frequencies up to 400 kHz. The standard 8 bit command is supported, the CMD part of the sequence is the 8 bit register address to READ from or to WRITE to.

Register Default Values

The internal TPS65800 registers are loaded during the initial power-up from an internal, non-volatile memory bank. The power-up default values are described in the sections detailing the registers functionality.

The register contents remain intact as long as OUT pin voltage remains above the internal UVLO threshold, V

When the OUT pin voltage falls below the VUVLO threshold all register bits are reset to the internal power

UVLO

up default.

I2C Address

The I2C specification contains several global addresses, which the slaves on the bus are required to respond to. The TPS65800 only responds (ACK) to addresses 0x90 and 0x91 and does not respond (NACK) to any other address.

Table 1. TPS65800 I2C Read/Write Address

BYTE BIT

MSB 6 5 4 3 2 1 LSB

TPS65800 I2C WRITE ADDRESS 1 0 0 1 0 0 0 0 TPS65800 I2C READ ADDRESS 1 0 0 1 0 0 0 1 I/O DATA BUS B7 B6 B5 B4 B3 B2 B1 B0

Incremental Read

The TPS65800 does not support incremental read operations. Each register must be accessed in a single read operation.

I2C Bus Release

The TPS65800 I2C engine does not create START or STOP states on the I2C bus during normal operation.

Sleep Mode Operation

When the sleep mode is set SDAT is held LO by the TPS65800. The overall system operation is not affected, as in sleep mode all TPS65800 integrated supplies are disabled and no power is available for any external devices connected to the TPS65800 SDAT pin. When sleep mode ends the SDAT pin is released before the TPS65800 integrated regulated supplies are enabled. See section on System Sequencing and TPS65800 Operating Modes for additional details on sleep mode operation.

I2C Bus Error Recovery

The I2C bus specification does not define a method to be used when recovering from a host side bus error. During a read operation, the SDA pin can be left in a LO state if the host has not sent enough SCL pulses to complete a transaction (i.e., host side bus error). The TPS65800 clears any SDA LO condition if 10 SCL pulses are sent by the host, enabling recovery from host side bus error events.

I2C Communication Protocol

The following conventions are used when describing the communication protocol:

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STOP

CONDITION

(P)

START

CONDITION

(S)

BIT 7

MSB

BIT 6

BIT0

LSB

ACKNOWLEDGE

(hAorbqA)

STOP

CONDITION

(P)

SCL

SDA

STOP

CONDITION

(P)

START

CONDITION

(S)

BIT 7 MSB

BIT 6

BIT 0

LSB

NOT

ACKNOWLEDGE

(hNorbqN)

STOP

CONDITION

(P)

SCL

SDA

STOP

CONDITION

(P)

START

CONDITION

(S)

BIT 7 MSB

BIT 6

SCL

SDA

DATALINE

STABLE

DATA

CHANGE

ALLOWED

BIT 5-1

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Table 2. I2C Naming Conventions Used

CONDITION CODE

START sent from host S STOP sent from host P TPS65800 I2C slave address sent from host, bus direction set from host to TPS65800 (WRITE) hA0 TPS65800 register address sent from TPS65800, bus direction is from TPS65800 to host (READ) hA1 Non-valid I2C slave address sent from host hA_N Valid TPS65800 register address sent from host HCMD Non-valid TPS65800 register address sent from host HCMD_N I/O data byte (8 bits) sent from host to TPS65800 hDATA I/O data byte (8 bits) sent from TPS65800 to host bqDATA Acknowledge (ACK) from host hA Not acknowledge (NACK) from host hN Acknowledge (ACK) from TPS65800 bqA Not acknowledge (NACK) from TPS65800 bqN

TPS65800

Figure 24. I2C operation waveforms

For normal data transfers, SDA is allowed to change only when SCL is low, and one clock pulse is used per bit of data. The SDA line must remain stable whenever the SCL line is high, as SDA changes when SCL is high are reserved for indicating the start and stop conditions. Each data transfer is initiated with a start condition and terminated with a stop condition.

When addressed, the TPS65800 device generates an acknowledge bit after the reception of each byte by pulling the SDA line Low. The master device (microprocessor) must generate an extra clock pulse that is associated with the acknowledge bit. After the acknowledge/not acknowledge bit the TPS65800 leaves the data line high, enabling a STOP condition generation.

I2C Read and Write Operations

The TPS65800 supports the standard I2C one byte Write. The basic I2C read protocol has the following steps:

• Host sends a start and sets TPS65800 I2C slave address in write mode.

• TPS65800 ACKs that this is a valid I2C address and that the bus is configured for write.

• Host sends TPS65800 register address.

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• TPS65800 ACKs that this is a valid register and stores the register address to be read.

• Host sends a repeated start and TPS65800 I2C slave address, reconfiguring the bus for read.

• TPS65800 ACKs that this is a valid address and that bus is reconfigured.

• Bus is in read mode, TPS65800 starts sending data from selected register.

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SCLK ... ......

SDAT

Slave Address

hA0

Slave Address

hA1

hCMD

....

A6 R0R7R/WA0

0 0

Start

...

D0D7R/WA0A6

Slave

Drives theData bqDATA

MasterDrives

ACKandStop

RepeatedStart, canbereplacedbya

STOP andSTART

SCLK

... ......

SDAT

Slave Address

hA0

HostSends

Data

hDATA

hCMD

.........

A6 R 6 R5 R0 D7 D6 D5 D0R7R/WA0A4A5

0 0 0 0

PStart

bqA bqA bqA hA PS

bqA bqA bqA

ACK

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

The I2C write protocol is similar to the read, without the need for a repeated start and bus being set in write mode. In a WRITE it is not necessary to end each 1 byte WRITE command with a STOP, a START has the same effect (repeated start).

The host can complete a READ or a WRITE sequence with either a STOP or a START.

Valid Write Sequences

The TPS65800 always ACKs its own address. If the CMD points to an allowable READ or WRITE address, bq writes the address into its RAM address register and sends an ACK. If the CMD points to a non-allowed address, bq does NOT write the address into its RAM address register and sends an NACK.

One Byte Write

The data is written to the addressed register when the bq ACK ending the one byte write sequence is received. The host can cancel a WRITE by sending a STOP or START before the trailing edge of the bq ACK clock pulse.

Figure 25. I2C read and write operations

S hA0 bqA S hA0 bqA hCMD bqA S hA0 bqA hCMD_N bqN

S hA0 bqA hCMD bqA hDATA bqA

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Valid Read Sequences

The TPS65800 always ACKs its own address.

S hA1 bqA

Upon receiving hA1, TPS65800 starts at wherever the RAM address register is pointing. The START and the STOP both act as priority interrupts. If the host has been interrupted and is not sure where it left off it can send a STOP and reset the TPS65800 state machine to the WAIT state; once in WAIT state, the TPS65800 ignores all activity on the SCL and SDA lines until it receives a START. A repeated START and START in the I2C specification are both treated as a START.

S hA0 bqA hCMD bqA P S hA0 bqA hCMD bqA S hA1 bqA bqDATA hN P S hA1 bqA bqDATA hN P

Non-Valid Sequences

Incremental read sequences

S hA1 bqA bqDATA hA bqDATA hA bqDATA hA bqDATA hA ... bqDATA hA P

START and non-hA0 or non-hA1 Address

A START followed by an address which is not bqA0 or bqA1 is NACKed.

S hA_N bqN

Attempt to Specify Non-Allowed READ Address

If the CMD points to a non-allowed READ address (reserved registers), bq sends a NACK back to the host, and it does not load the address in the RAM address register. Note that TPS65800 NACKS whether a stop is sent or not.

S hA0 bqA hCMD_N bqN P S hA0 bqA hCMD_N bqN

Attempt to Specify Non-Allowed WRITE Address

If the host attempts to WRITE to a READ-ONLY or non-accessible address TPS65800 ACKS the CMD containing the allowed READ address, loads the address into the address register and NACKS after the host sends the next data byte. After issuing the NACK TPS65800 returns to WAIT state. A subsequent hA1 READ could read this address.

S hA0 bqA hCMD bqA hDATA bN

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

TPS65800 INTERNAL REGISTER MAP

hex NAME DESCRIPTION ADDITIONAL

0 RESERVED_01 RESERVED FACTORY ONLY 1 RESERVED_02 RESERVED FACTORY ONLY 2 PGOOD Output voltage status for linear regulators and dc/dc buck converters 3 INTMASK1 Interrupt request masking settings 4 INTMASK2 Interrupt request masking settings 5 INT_ACK1 Masked interrupt request register, latched 6 INT_ACK2 Masked interrupt request register, latched 7 PGOODFAULT_MASK System Reset masking settings 8 SOFT_RESET Generates a software reset 9 CHG_CONFIG Battery charger configuration A CHG_STAT Battery charger status B EN_LDO Linear regulator ON/OFF control C LDO12 LDO1 and LDO2 output voltage setting D LDO3 LDO3 output voltage settings E LDO4 LDO4 output voltage settings F LDO5 LDO5 output voltage settings 10 SM1_SET1 SM1 Buck converter ON/OFF control and output voltage setting, normal mode 11 SM1_SET2 SM1 Buck converter configuration 12 SM1_STANDBY SM1 Buck converter standby mode ON/OFF and standby output voltage setting 13 SM2_SET1 SM2 Buck converter ON/OFF control and output voltage setting, normal mode 14 SM2_SET2 SM2 Buck converter configuration 15 SM2_STANDBY SM2 Buck converter standby mode ON/OFF and standby output voltage setting 16 SM3_SET SM3 White LED driver ON/OFF control and settings 17 RGB_FLASH Overall RGB driver timing settings 18 RGB_RED RGB driver: RED duty cycle and output current setting 19 RGB_GREEN RGB driver: GREEN duty cycle and output current setting 1A RGB_BLUE RGB driver: BLUE duty cycle and output current setting 1B GPIO12 GPIO1 and GPIO2 configuration 1C GPIO3 GPIO2 and GPIO3 configuration, battery charge voltage selection 1D PWM PWM output configuration 1E ADC_SET ADC On/OFF control, ADC configuration 1F ADC reading_hi ADC data output 20 ADC reading_lo ADC data output 21 DHILIM1 ADC Maximum threshold setting 22 DHILIM2 ADC Maximum threshold setting 23 DLOLIM1 ADC Minimum threshold setting 24 DLOLIM2 ADC Minimum threshold setting 25 ADC_DELAY ADC configuration: conversion delay 26 ADC_WAIT ADC configuration: wait and repeat operation 27 LED_PWM LED_PWM configuration 2E RESERVED_03 RESERVED FACTORY ONLY

DETAILS

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INT

SDAT

SCLK

HOT_RST

RESPWRON

TRSTPWON

SYS_IN

HOST INTERFACE

ANDSEQUENCING

OUT

HOST

TPS65800

TRSTPWON

210kW

100kW

C16

100nF

R4100kW

R32kW

R22kW

0.1 Fm

R5100k

I2CENGINE

INTERRUPT

CONTROLLER

STATEMACHINE

ANDRESET

CONTROLLER

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

FUNCTIONALITY REFERENCE GUIDE – HOST INTERFACE AND SYSTEM SEQUENCING

INTERRUPT CONTROLLER, OPEN-DRAIN OUTPUT (INT)

System Parameters Monitored by Interrupt Controller Power up

Supply Output System

Power Good Fault Status ADC status

Detection

LDO1, LDO2, External resistive LDO3, LDO4, load connected to

(1)

SM1, ADC conversion end SM2, ADC SM3, Input out of range

Modification

Thermal Fault or ↔ Done AC detected: yes ↔ no

GPIO 1,2 DPPM:on ↔ off USB detected: yes ↔ no

configured as Charge Suspend: on ↔ Input OVP: yes ↔ no

external interrupt off System Power: AC ↔

LDO5 ANLG1

request Thermal Foldback: on USB

Can be masked Individually

via I2C. Blanked during Can be masked Individually via I2C

initial power up

Charger Status Input and Output

Transition Power Transition

Charge: Pre ↔ Fast

↔ off

Can be masked as a group via a single I2C mask

(1) For all supplies (except) for SM3 an output fault is detected if the output voltage is below 90% of the programmed regulation voltage. In

the SM3 converter an output fault indicates that the output OVP threshold was reached.

EVENTS TRIGGERING TPS65800 OPERATING MODE CHANGES

EVENT POWER GOOD FAULT THERMAL HARDWARE SOFTWARE

DETECTION

(1)

FAULT RESET RESET

How transition is Integrated regulator output Internal IC junction Using HOT_RST control I2C register control bit triggered voltage below target value: temperature pin

SM1, SM2, SM3, LDO1, LDO2,LDO3, LDO4, LDO5

Operating mode Sets Sleep mode or starts a Sets sleep mode when Generates external host Generates external host change new power-up cycle when thermal fault is detected reset pulse at pin reset pulse at pin

power good fault is detected RESPWON when RESPWON when I2C (see state machine diagram). HOT_RST=LO. control bit is set.

Power good fault detection Input and battery power Pulse duration set by Pulse duration set by comparators are blanked during cycling required to exit external capacitor. external capacitor. initial power-up. sleep

Controls Can be masked Individually via Fixed internal threshold External Input Set via I2C

I2C.

(1) For all supplies (except) for SM3 an output fault is detected if the output voltage is below 90% of the programmed regulation voltage. In

the SM3 converter an output fault indicates that the output OVP threshold was reached.

default

All interrupt

controller inputs set to non-masked

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Figure 26. Required External Components, Recommended Values, External Connections

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INTERRUPT

CONTROLLER

INT

SDAT

SCLK

SEQUENCING

ANDOPERATING

MODESETTING

HOT_ RST

RESPWRON

TRSTPWON

SYS _IN

HOST INTERFACE ANDSEQUENCING

I2CENGINE I2CREGISTERS

NON-VOLATILE

MEMORY

CONTROL

LOGIC

AC/USB/BAT

(HIGHERVOLTAGE)

VSYS

OUT

HOST

TPS65800

R 1

R 6

C 16

R 5

R 3

R 2

R 4

TRSTPWON

2.5V

AND

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

INTERRUPT CONTROLLER AND SYSTEM SEQUENCING

Overview

The TPS65800 has two dedicated internal controllers that execute the host interface and system sequencing tasks: a sequencing controller and an interrupt controller.

The sequencing controller monitors internal and system parameters and defines the sequencing of the internal power supplies during power up and power down / power fault events, and executes specific internal power supply reset operations under external hardware control or host software commands.

The following parameters are monitored by the sequencing controller:

• System power bus voltage (at SYS_IN pin), input supply voltage, battery pack voltage

• TPS65800 thermal fault status

• Integrated supply status

The interrupt controller monitors multiple system status parameters and signals to the host when one of the monitored parameters toggled, as a result of a system status change. The interrupt controller inputs include all the parameters monitored by the sequencing controller plus:

• Charger status

• Battery pack status

• ADC status

Internal I2C registers enable masking of all the monitored parameters. Using those registers the host can select which parameters trigger an interrupt or a power-good fault. Power good faults trigger a change in the TPS65800 operating mode, as detailed in the next sections.

A simplified block diagram for the TPS65800 sections that interface to the external host is shown in Figure 27 .

Figure 27. Simplified Block Diagram

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LOADPOWERUP DEFAULTSIN

I2CREGISTERS

CONNECT AC, USBORBAT PIN TO

OUT PIN

DISABLEPOWERGOODFAULT

DETECTION

INT PIN = HIGHIMPEDANCE

POR_FLAG = HI

SLEEP STATE

ONLY RTC _LDOISON

POWERPATH ACTIVE

RESPWRON = 0

INTERRUPT CLEARED

OFF

PROCESSOR

STANDBY STATE

RESPWRON = HI

PGFORSM1&SM2

ismasked

ENABLESTATE

RESPWRON=LO,

START BOOT- UP TIMER

SEQUENCESTATE

START INTEGRATED

SUPPLY START - UP SEQUENCE

RESPWRON

= LO

POWERGOOD CHECKSTATE

RESPWRON=HI

ENABLEPOWERGOODCOMPARATORS

INT PINMODESET BY INTERRUPT

CONTROLLER

NORMAL MODE

RESPWRON=HI

ANY

STATE

RESETSTATE

RESPWRON=LO

START SYSTEMRESET PULSE TIMER

WHENHOT_RESET=HI

RESET

TIMEREXPIRES

V(SYS_IN) > AND

V(OUT) > V

(LOW_SYS)

V(AC) > V

UVLO

V(USB) > V

UVLO

V(BAT) > V

UVLO

NOPGOOD

FAULT

STANDBY

OFF

PGOOD

FAULT

PGOOD

FAULT

V(OUT) < V

UVLO

RESPWRON=LO

V(SYS_IN) <

POWER

CYCLE

AND

SLEEP NOT SET BY

THERMAL FAULT

THERMAL

FAULT

V(HOT_RESET)= LO

I2CSOFT_RESET

SOFT_RST = HI

V(HOT_RESET)=HI OR

I2CSOFT_RESET

SOFT_RESET = LO

(SELFCLEARED)

V(HOT_RESET)= LO

I2CSOFT_RESET

SOFT_RST= HI

PGOODFAULT : A NON - MASKEDBIT OF THE POWER _GOODI2CREGISTER TOGGLES FROMLO TOHI

STANDBY ON : SM1 ANDSM 2 SET INSTANDBY MODEBY GPIOORI 2CCOMMAND

STANDBY OFF : SM1 ANDSM 2 EXIT STANDBY MODEBY GPIOOR

I2CCOMMAND

RESETTIMER : VALUESET BY CAPACITOR CONNECTED TO TRSTPWONPIN

I2CSOFT_RESETBIT LOCATEDIN SOFT_RESET REGISTER , BIT B0

POWERUP

I2CSOFT_ RESET

BIT SLEEP_MODE = HI

(SELF-CLEARED )

UVLO

(LOW_SYS)

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

SYSTEM SEQUENCING AND TPS65800 OPERATING MODES

The TPS65800 has a state machine that controls the device power up and power down sequencing. The main operating modes are shown in the state diagram below:

POWER-UP– If the AC, USB and BAT pin voltages are below the internal UVLO threshold V IC blocks are disabled and the TPS65800 is not operational, with all functions OFF. When an external power source or battery with voltage greater than the V internal TPS65800 references are powered up, biasing internal circuits. When all the main internal supply rails are active the TPS65800 I2C registers are set to the power-up default values, shown below:

Figure 28. TPS65800 State Diagram

UVLO

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voltage threshold is applied to AC/USB or BAT pins the

UVLO

(2.5 V typ) all

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V(OUT) + V

(LOW_SYS)

1 )

R6 R1

where R6 and R1 are external resistors, V

(LOW_SYS)

+ 1 V typical

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Table 3. Integrated Supply and Drivers Power-Up Defaults

SUPPLY POWER-UP DEFAULT OTHER BLOCKS POWER-UP DEFAULT

LDO0 OFF, 3.3 V POWER PATH INPUT TO SYSTEM LDO1 2.85V, ON PWM OFF LDO2 3.3 V, ON PWM_LED OFF LDO3 1.25 V, ON GPIO1 INPUT LDO4 2.75 V, ON GPIO2 INPUT LD05 2.81 V, ON GPIO3 INPUT SIM 1.8 V, OFF ADC OFF RTC_OUT ON, 3.1 V SM3 (WHITE LED) OFF LDO_PM 3.3 V, ON @ OUT POWERED RGB DRIVER OFF SM1 ON, 1.24 V INTERRUPT MASK NONE MASKED SM2 ON, 1.8 V POWER GOOD MASK ALL MASKED CHARGER ON

After the internal I2C register power-up defaults are loaded the power path control logic is enabled, connecting the external power source to the OUT pin. A status flag (nRAMLOAD) is set to LO in the SOFT_RESET register, indicating that the I2C registers were loaded with the power-up defaults, and the TPS65800 enters the ENABLE mode.

ENABLE: In the ENABLE mode the R ESPWRON output is set to the LO level, the INT pin mode is set to high impedance and all the power good comparators that monitor the integrated supply outputs are disabled. The ENABLE mode is used by the TPS65800 to detect when the main system power rail (OUT pin) is powered and ready to be used on the internal supply power-up. The OUT pin voltage is sensed by an internal low system voltage comparator, which holds the IC in the ENABLE mode until the system power bus voltage (OUT pin) has reached a minimum operating voltage, defined by the user. The internal comparator senses the system voltage at pin SYS_IN, and the threshold for the minimum system operating voltage at the OUT pin is set by the external divider connected from OUT pin to SYS_IN pin. The threshold voltage is calculated as follows:

The minimum system operating voltage should always be set above the internal UVLO threshold V normal application conditions the minimum system operating voltage is usually set to a value that assures that the TPS65800 integrated regulators are not operating in the dropout region.

When the voltage at the SYS_IN pin exceeds the internal threshold V

(LOW_SYS)

the TPS65800 is ready to start

the system power sequencing, and the SEQUENCING mode is entered. SEQUENCING– The sequencing state starts immediately after the enable state. In this mode of operation the

integrated supplies are turned ON, according to the sequencing steps loaded from the internal non-volatile memory during the power-up phase. The TPS65800 sequencing timing diagram shown in figure details the internal timing delays and supply sequencing. At the end of the sequencing state the user-programmable reset timer is started, and the TPS65800 enters the reset state.

(1)

. In

UVLO

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OUT

SM2

RESPWRON

INT

RESET DELAY

PROGRAMMEDBY EXTERNAL CAPACITOR

CONNECTED TOPIN TRSTPWON

Power Applied

SYS_IN

RTC_OUT

LDO2

LDO5

LDO3

LOW_SYS

SEQUENCING

RESET NORMAL

NOPOWER

LDO1

I CRegistersLoadedFrom

E PROM

ENABLE

HI-Z

AC,USB,ORBAT

UVLO

HI-Z

DLY(D2)

DLY(D1)

LD04

SM1

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Figure 29. TPS65800 Supply Sequencing Timing

RESET – When the reset state starts the RESPWRON output is LO. The user can program the reset timer value

selecting the value of the external capacitor connected to pin TRSTPWON, as shown below:

(RESET)

= K

× C

RESET

TRSTPWON

; where K

is the reset timer constant (1 ms/nF typ)

RESET

The TPS65800 RESPWRON pin should be used to reset the external host. During the external host reset ( RESPWRON = LO) the I2C SDA and SCL pins are not used to access TPS65800 internal registers. If a non-standard configuration is used to reset the system the SDA and SCL lines should not be used to communicate with the TPS65800 until RESPWRON = HI, in order to avoid overwriting the integrated power supply internal power-up settings during the sequencing mode.

The power good comparators are masked during the reset mode. The reset mode ends when the reset timer expires, and the TPS65800 goes into the power good check mode.

The RESPWRON signal set to a high level is the proper signal to use as an indicator that the device has transitioned out of the reset state. During the power-up sequence the RESPWRON pin is asserted LOW until the RESET TIMER expires. The RESET TIME (t between the TRSTPWON pin and ground.

= 1ms/nF × CTRSTPWON) can be programmed via a capacitor

reset

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

When the RESPWRON signal is LO, all internal and external interrupts are ignored. As a result, the open-drain output that asserts the INT pin LO during a NORMAL MODE interrupt request is disabled. The INT pin is then asserted HI via a pullup resistor that is typically connected to VOUT. After the RESPWRON signal goes HI, the interrupt controller is given control of the INT pin. Finally, the rising edge of the RESPWRON pin should be used to indicate the PMIC has transitioned from the RESET STATE to the POWER GOOD CHECK STATE. At that point, the interrupt controller asserts an interrupt if necessary.

POWER GOOD CHECK – In the power good check mode the power good comparators are enabled, providing status on the integrated supplies output voltages. An output voltage is considered as out of regulation and generates a fault condition if the output voltage is below 90% of the target output voltage regulation value. If a power good fault is detected the SLEEP mode is set, if a power good fault is not detected the NORMAL mode is set.

The individual supply power good status can be masked via an I2C register PGOODFAULT_MASK. Supplies that have their power-good fault status masked do not generate a power good fault. However, the status bit for the supply indicates that the output voltage is out of regulation.

The power good mask register bits default to masked upon power up. NORMAL MODE – If a power good fault is not present at the end of the power good check mode the NORMAL

mode starts. In this mode of operation the I2C registers define the TPS65800 operation, and the host has full control on operation modes, parameter settings, etc. The normal state operation ends if a thermal fault, system low voltage fault ( V(SYS_IN) < V

LOW_SYS

fault sets the SLEEP mode operation, a power good fault sets the NO POWER operation mode. From the normal mode the converters SM1 and SM2 can be set in the STANDBY mode, with reduced output voltages. In NORMAL mode either an I2C register bit (SOFT_RESET register bit SOFT_RST) or a hardware input ( HOT_RESET pin set to LO) can trigger a transition to the RESET state, enabling implementation of a host reset function. In NORMAL mode an I2C register bit (SOFT_RESET register bit SLEEP_MODE) can trigger a transition to SLEEP mode.

SLEEP MODE – The SLEEP mode is set when a thermal fault or system low voltage fault is detected, under NORMAL operation mode set. This operation mode is also set when a power good fault is detected during the power good check state or via the I2C bit SLEEP_MODE. In the SLEEP mode the RESPWRON output is set to LO, and the I2C registers keep the same contents as in the state preceding SLEEP mode, with the exception of the following control bits, which are reset to the default power-up values:

1. LDO1, -2, -3, -4, -5, and RTC_OUT are enabled, SIM LDO is disabled: EN_LDO register set to default values

2. LDO0 disabled, all GPIO’s with no control function assigned: GPIO12, GPIO3 registers set to default values

3. White LED driver is set to OFF: SM3_SET register has all bits set to LO

4. RGB drivers are set to OFF: RGB_FLASH, RGB_RED, RGB_GREEN, RGB_BLUE registers are set to default values

5. PWM, PWM_LED drivers OFF: PWM, LED_PWM registers are set to default values

6. ADC engine reset to power up default: ADC_SET, ADC_DELAY, ADC_WAIT registers are set to default values

In SLEEP mode, the power path and main internal blocks are still active, but the internal integrated supply sequencing is disabled. As a result of that, during SLEEP mode ALL integrated supplies (ALL LDOs, ALL buck converters) are disabled.

At the end of the SLEEP mode, the sequencer block uses the I2C control register values (which were reset to the default power-up values) to sequence the integrated power supplies. The SLEEP mode ends when one of the three following events happens:

1. If SLEEP was set by thermal fault: The SLEEP mode ends only when all external input supplies and battery pack are removed and a UVLO condition is detected by the TPS65800, setting the NO POWER mode.

2. If SLEEP was set by a system low voltage detection, or I2C bit SLEEP_MODE, only with battery present: Input power must be connected, setting the TPS65800 in the ENABLE mode. If no input power is inserted, the battery discharges until the TPS65800 detects an UVLO condition and enters the NO POWER mode.

) or power-good fault is detected. A thermal fault or system low voltage

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

3. If sleep was set by a system low-voltage detection, power good fault or SLEEP_MODE, with battery and input power present: all external input supplies connected to AC and USB pins must be removed, and

then at least one of them reconnected to the system. The input power cycling triggers a transition from the SLEEP mode to the ENABLE mode.

PROCESSOR STANDBY STATE– This state is set using a I2C register or a GPIO configured as SM1/SM2 standby control. In standby mode operation the SM1 and SM2 voltages are set to value distinct than the normal mode output voltage, and SM1/SM2 are set to PFM mode. The standby output voltage is defined in I2C registers SM1_STANDBY and SM2_STANDBY.

TPS65800 OPERATING MODE CONTROLS

HARDWARE RESET: A dedicated control pin, HOT_RESET, enables implementation of a hardware reset

function. The system reset pin RESPWRON is set to LO when HOT_RESET = LO for a period longer than the internal deglitch (5 ms, typ). The RESET mode is started when the HOT_RESET pin transitions from LO to HI, as shown in the state diagram.

SOFTWARE RESET: The external host can set the TPS65800 in RESET mode using the I2C register SOFT_RESET, bit B0 (SOFT_RST).

SOFTWARE SLEEP: The external host can set the TPS65800 in SLEEP mode using the I2C register SOFT_RESET, bit B6 (SLEEP_MODE).

A hardware or software reset does not affect the contents of the I2C registers.

SEQUENCING AND OPERATING MODES – I2C REGISTERS

The I2C registers that control sequencing-related functions are shown below. The HEX address for each register is shown by the register name, together with the R or W functionality for the register bits. Shaded values indicate default initial power-up values.

SOFT_RESET, ADDRESS=08, ALL BITS R/W, BITS B7/B6/B1/B0 APPLY TO SEQUENCING.

B7 B6 B5 B4 B3 B2 B1 B0

Bit name STBY MODE SLEEP MODE NOT USED NOT USED SM3_LF_OSc NOT USED nRAMLOAD SOFT RST Function SET SM1 AND SET TPS65800 NOT USED NOT USED NOT RELATED NOT USED RAM RESET SOFTWARE

When 0 NOT ACTIVE NOT ACTIVE NOT USED NOT USED NOT USED RAM NOT ACTIVE

When 1 When 1 SET SET SLEEP NOT USED NOT USED NOT USED RAM SET RESET

Some host algorithms need to identify when the power-up defaults are loaded in the RAM, in order to start routines that initialize specific RAM registers. If that functionality is required the nRAMLOAD bit should be set to HI by the host when entering hte NORMAL operation mode. The nRAMLOAD bit is reset to LO by the TPS65800 when the power-up defaults are loaded in the I2C registers (V(OUT)<V detected), enabling the host algorithm to detect that the RAM registers require initialization.

The integrated supplies status is available in a dedicated register, shown below. The host can select which integrated supply outputs trigger a power-good fault condition using the PGOODFAULT_MASK register.

When a non-masked power-good status register bit toggles state, the sequence controller generates a transition in the TPS65800 state machine, indicated as a PGOOD FAULT in the TPS65800 state diagram.

The power-good status register and mask register are shown below:

SYSTEM STATUS MONITORED BY SEQUENCING CONTROLLER

PGOOD, ADDRESS=02, ALL BITS READ ONLY - POWER UP DEFAULTS SHOW SYSTEM STATUS WHEN EXITING POWER DOWN Bit name PGOOD SM1 PGOOD SM2 PGOOD SM3 PGOOD LDO1 PGOOD LDO2 PGOOD LDO3 PGOOD LDO4 PGOOD LDO5 Function SM1 OUTPUT SM2 SM3 OVP LDO1 OUTPUT LDO2 OUTPUT LDO3 OUTPUT LDO4 OUTPUT LDO5 OUTPUT

SM2 IN IN SLEEP TO FLAG RESET

STANDBY MODE SEQUENCING CONTROL

MODE SEE SM3

SM1 AND SM2 MODE (reset to DEFAULTS MODE (reset to

IN STANDBY LO internally) NOT LOADED LO internally)

B7 B6 B5 B4 B3 B2 B1 B0

STATUS OUTPUT STATUS STATUS STATUS STATUS STATUS STATUS

STATUS

SECTION

DEFAULTS

LOADED

OR PGOOD fault

UVLO

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

SYSTEM STATUS MONITORED BY SEQUENCING CONTROLLER

B7 B6 B5 B4 B3 B2 B1 B0

When 0 OK OK OK OK OK OK OK OK When 1 FAULT FAULT FAULT FAULT FAULT FAULT FAULT FAULT PGOODFAULT_MASK, ADDRESS=07, ALL BITS R/W Bit name MASK_PSM1 MASK_PSM2 MASK_PSM3 MASK_PLDO1 MASK_PLDO2 MASK_PLDO3 MASK_PLDO4 MASK_PLDO5 Function MASK PGOOD MASK MASK PGOOD MASK PGOOD MASK PGOOD MASK PGOOD MASK PGOOD MASK PGOOD

When 0 UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED When 1 MASKED MASKED MASKED MASKED MASKED MASKED MASKED MASKED

INTERRUPT CONTROLLER

The TPS65800 has internal block and overall system status information stored in I2C status registers. The following subsystems and system parameters are monitored:

• External power supply status: AC or USB supply detected, AC or USB connected to system, AC/USB OVP

• Charger status: on/off/suspend, fast charge/precharge, termination detected, DPPM on, thermal loop ON

• Battery pack status: temperature, discharge on/off

• TPS65800 Thermal shutdown

• ADC status: conversion status, input out of range, ANLG1 high impedance detection

• Integrated supplies status: output out of regulation (power good fault)

The GPIO1 and GPIO2 pins can be configured as inputs, generating an interrupt request to the host ( INT:HI → LO) at the GPIO rising or falling edge. The host can use internal the INT_MASK I2C registers to define which of the monitored status variables triggers an interrupt. When a non-masked system status bit toggles state, the interrupt controller issues an interrupt, following the steps below:

1. system status bits that caused the interruption are set to HI in registers INT_ACK1 and INT_ACK2

2. An interrupt is sent to the host ( INT:HI → LO)

Once an interrupt is sent to the host, INT is kept in the LO state and the INT_ACK registers contents are latched, holding the system status that generated the currently issued interrupt request. When an interrupt request is active ( INT = LO) additional changes in non-masked status registers and control signals are ignored, and the INT_ACK registers are not updated.

The host must write a 0 to the INT_ACK register bit that generated the interrupt in order to set INT = HI and enable new updates to the INT_ACK registers. If the host stops in the middle of a WRITE or READ operation, the INT pin stays at the LO level. The TPS65800 has no reset timeout; it is assumed that the host does not leave INT = LO and the status registers unread for a long time.

The non-masked I2C register bits and internal control signals generate a new interrupt only after INT is set to HI. The non-masked power-good fault register bits generate a power-good fault when any of the non-masked bits detects that the monitored output voltage is out of regulation, independently of the INT pin level.

FAULT BY SM1 PGOOD FAULT BY FAULT BY FAULT BY FAULT BY FAULT BY FAULT BY

FAULT BY SM3 LDO1 LDO2 LDO3 LDO4 LDO5

SM2

SYSTEM STATUS — I2C REGISTERS

The I2C registers that have system status data are shown below. The HEX address for each register is shown by the register name, together with the R or W functionality for the register bits. Those registers are valid, after an initial power up, when the TPS65800 enters the normal operation mode.

SYSTEM STATUS MONITORED BY INTERRUPT CONTROLLER

B7 B6 B5 B4 B3 B2 B1 B0

PGOOD, ADDRESS=02, ALL BITS READ ONLY - POWER UP DEFAULTS SHOW SYSTEM STATUS WHEN EXITING POWER DOWN Bit name PGOOD SM1 PGOOD SM2 PGOOD SM3 PGOOD LDO1 PGOOD LDO2 PGOOD LDO3 PGOOD LDO4 PGOOD LDO5 Function SM1 OUTPUT SM2 OUTPUT SM3 OVP LDO1 OUTPUT LDO2 OUTPUT LDO3 OUTPUT LDO4 OUTPUT LDO5 OUTPUT

When 0 OK OK OK OK OK OK OK OK When 1 FAULT FAULT FAULT FAULT FAULT FAULT FAULT FAULT

STATUS STATUS STATUS STATUS STATUS STATUS STATUS STATUS

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

SYSTEM STATUS MONITORED BY INTERRUPT CONTROLLER

B7 B6 B5 B4 B3 B2 B1 B0

CHG_STAT, ADDRESS=A, ALL BITS READ ONLY – POWER UP DEFAULTS SHOW SYSTEM STATUS WHEN EXITING POWER DOWN Bit name BAT_STAT Function BATTERY DISCH SELECTED THERMAL AC INPUT USB INPUT CHARGE STATUS AC OR USB

When 0 NOT AC INPUT BOTH OFF AC NOT USB NOT 00=FAULT/OFF/SUSPEND, NO OVP

DISCHARGING SELECTED DETECTED DETECTED 01=DONE, 10=FAST CHG ON,

When 1 When 1 USB INPUT DPPM ON OR AC DETECTED USB OVP

DISCHARGING SELECTED THERMAL ON DETECTED DETECTED

ADC STATUS

REGISTER ADC_READING_HI, B7: CONVERSION COMPLETE; INTERNAL STATUS BITS (NO I2C REGISTER BIT AVAILABLE: INPUT OUT OF RANGE (HI OR LO), ANLG1 PIN IMPEDANCE TO AGND2 EXCEEDS 1

m Ω OTHER SYSTEM STATUS: THERMAL FAULT DETECTED

(1) BAT_STAT pin does not generate an interrupt, in order to avoid oscillatory behavior when battery supplement mode is set.

INTERRUPT CONTROLLER – I2C REGISTERS

The I2C registers that control an interrupt generation (INT: HI → LO) are shown below. The HEX address for each register is shown by the register name, together with the R or W functionality for the register bits. Shaded values indicate default initial power-up values.

INTERRUPT AND POWER GOOD FAULT MANAGEMENT REGISTERS

INTMASK1, ADDRESS=03, ALL BITS R/W Bit name MASK_ISM1 MASK_ISM2 MASK_ISM3 MASK_ILDO1 MASK_ILDO2 MASK_ILDO3 MASK_ILDO4 MASK_ILDO5 Function MASK INT by MASK INT by MASK INT by MASK INT by MASK INT by Mask INT by MASK INT by MASK INT by

SM1 PGOOD SM2 PGOOD SM3 PGOOD LDO1 PGOOD LDO2 PGOOD LDO3 PGOOD LDO4 PGOOD LDO5 PGOOD

When 0 UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED When 1 MASKED MASKED MASKED MASKED MASKED MASKED MASKED MASKED INTMASK2, ADDRESS=04, ALL BITS R/W Bit name MASK_IADC MASK_IANLG1 MASK_IGPIO2 MASK_IGPIO1 MASK_ITHSH MASK_ICHGS MASK_IADC_H MASK_IADC_L

Function MASKS INT BY MASKS INT BY MASKS INT BY MASKS INT BY MASKS INT BY MASK INT BY MASK INT BY MASK INT BY

ADC END OF ANLG1 HIGH GPIO2 EDGE GPIO1 EDGE THERMAL CHG_STAT ADC INPUT ADC INPUT

CONVERSION IMPEDANCE TRANSITION TRANSITION FAULT REGISTER ABOVE HI BELOW LO

When 0 UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED When 1 MASKED MASKED MASKED MASKED MASKED MASKED MASKED MASKED INT_ACK1, ADDRESS=05, ALL BITS R/W Bit name ACK_SM1 ACK_SM2 ACK_SM3 ACK_LDO1 ACK_LDO2 ACK_LDO3 ACK_LDO4 ACK_LDO5 Function SM1 INT SM2 INT SM3 INT LDO1 INT LDO2 INT LDO3 INT LDO4 INT LDO5 INT

When 0 CLEAR FLAG CLEAR FLAG CLEAR FLAG CLEAR FLAG CLEAR FLAG CLEAR FLAG CLEAR FLAG CLEAR FLAG When 1 SM1 PGOOD SM2 PGOOD SM3 OVP LDO1 PGOOD LDO2 PGOOD LDO3 PGOOD LDO4 PGOOD LDO5 PGOOD

GENERATED GENERATED GENERATED GENERATED GENERATED GENERATED GENERATED GENERATED

INT_ACK2, ADDRESS=06, ALL BITS READ ONLY Bit name ACK_ADC ACK_ANLG1 ACK_GPIO2 ACK_GPIO1 ACK_THSHUT ACK_CHGSTA ACK_ADC_HI ACK_ADC_LO

Function ADC INT ANLG1 GPIO2 INT GPIO1 INT THERMAL CHARGER INT ADC INT ADC INT

REQUEST 1 COMPARATO REQUEST REQUEST FAULT INT REQUEST REQUEST 2 REQUEST 3

When 0 CLEAR FLAG CLEAR FLAG CLEAR FLAG CLEAR FLAG CLEAR FLAG CLEAR FLAG CLEAR FLAG CLEAR FLAG

(1)

INPUT _PWR THDPPM_ON ACPG USBPG STAT1 STAT2 INP_OV

STATUS INPUT POWER FAULT AND POWER POWER INPUT OVP

B7 B6 B5 B4 B3 B2 B1 B0

FAULT FAULT FAULT FAULT FAULT FAULT FAULT FAULT

REQUEST REQUEST REQUEST REQUEST REQUEST REQUEST REQUEST REQUEST

FAULT FAULT FAULT FAULT FAULT FAULT FAULT FAULT

INT INT INT INT INT INT INT INT

STATUS DPPM MODE STATUS STATUS DETECTION

11= PRECHARGE

UT T I O

BITS LIMIT LIMIT

R INT REQUEST

REQUEST

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BAT

OUT

USB

TMR

ISET

BAT

OUT

DPPM

POWERPATH

CONTROL

LINEAR

CHARGER

Battery

GND

AC _DC Adapter

Output

USBPower

ACSWITCH

USBSWITCH

BATTERY SWITCH

SYSTEMPOWERBUS

TPS 65800

Withtheabovecomponentsthefollowingsystem parametersareset : FastChargeCurrent = 1A (100% scaling, inputlimit=2.5A) Safety Timer = 5hours, 30 minpre-charge DPPMthreshold = 4.3V Temphot: 65C TempCold : 5C

SystemPower

Selection

InputCurrentLimit

Selection

ChargeVoltage

FastCharge

CurrentScaling

ChargeSuspend

I2CREGISTERS

37.4k

DPPM

C26 22 Fm

C25 10 Fm

50k

NTC

49.9k

TMR

10 Fm

C23 47nF

1k

SET

C24

0.22 Fm

10 Fm

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

INTERRUPT AND POWER GOOD FAULT MANAGEMENT REGISTERS

B7 B6 B5 B4 B3 B2 B1 B0

When 1 ADC DONE ANLG1 HIGH GPIO2 EDGE GPIO1 EDGE THERMAL CHARGER ADC INPUT ADC INPUT

PGOODFAULT_MASK, ADDRESS=07, ALL BITS R/W Bit name PGOOD SM1 PGOOD SM2 PGOOD SM3 PGOOD LDO1 PGOOD LDO2 PGOOD LDO3 PGOOD LDO4 PGOOD LDO5 Function MASK PGOOD MASK PGOOD MASK PGOOD MASK PGOOD MASK PGOOD MASK PGOOD MASK PGOOD MASK PGOOD

When 0 UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED UNMASKED When 1 MASKED MASKED MASKED MASKED MASKED MASKED MASKED MASKED

FUNCTIONALITY GUIDE — SYSTEM POWER AND CHARGE MANAGEMENT

Charge Charge Current Current Current Scaling

Current Value Scaling

, 25%, 50%, 75%, 10% of I(TERM), 10% of 25%, 50%, 75%, 4.2 V or 3.0 V Programmable Charger ON

O(BAT)

Programmable, 100% of I

1.5A max value Set via external Fixed ratio Fixed ratio Fixed Set via external

resistor resistor

(1) The input current limit (see system power management below ) regulates the input current, effectively limiting the charge current if the

input current limit is lower than the fast charge current value programmed.

INPUT CURRENT LIMIT INPUT CONNECTED TO OUT PIN POWER UP DEFAULT

AC PIN USB PIN INPUT POWER TO SYSTEM BATTERY TO SYSTEM

2.5 A typ 100 mA max or #1 – AC Battery connected to Input Power to System,

Internal fixed Automatic internal algorithm current limit

GENERATED IMPEDANCE GENERATED GENERATED FAULT STATUS ABOVE HI BELOW LO

INT REQUEST DETECTION INT REQUEST INT REQUEST GENERATED CHANGE LIMIT LIMIT

GENERATED INT REQUEST GENERATED GENERATED GENERATED

INT REQUEST INT REQUEST INT REQUEST INT REQUEST

FAULT BY FAULT BY FAULT BY FAULT BY FAULT BY FAULT BY FAULT BY FAULT BY

SM1 SM2 SM3 LDO1 LDO2 LDO3 LDO4 LDO5

CHARGE MANAGEMENT

Fast Charge

(1)

Precharge Termination Charge Precharge SafetyTimer Power Up

Current Voltage Voltage Timeout Default

O(BAT)

100% of I

(TERM)

4.36 V

Set via I2C Set via I2C Set via I2C

POWER PATH MANAGEMENT

500 mA max or #2 – USB system, independently of USB mode selected,

2.5 A typ #3 – Battery (when AC pin power and USB pin power are battery voltage 100 mA max not detected )

Set via I2C Set via I2C, overrides

internal algorithm

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Figure 30. Required External Components, Recommended Values, External Connections

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BAT

BATTERY

STATUS

ISET1

CHARGE

CONTROL AND

POWERPATH

MANAGEMENT

VREF

I( )

I(OUT)/ K

(SET)

OUT

(DPPM)

DPPM

(SET)

V(ISET1)

(PRECHG)

CHMODE

(USB2)

INPUT_LIM

(USB1)

(ACOC)

V(OUT)

O(REG)

V(OUT)

O(REG)

J(REG)

V(BAT)

O(REG)

BATTERY

STATUS

DETECTION

SYSTEM STATUS

DETECTION

Dynamically

Controlled

Oscillator

TimerFault

VREF

USB

SCALING

ATTENUATION

CONTROL SIGNALS

BATOFF

USBOFF

ACOFF

TMR

OUT

USB

BAT

On, Reset

SystemPower

Selection

InputCurrentLimit

Selection

ChargeVoltage

FastCharge

CurrentScaling

ChargeSuspend

ChargerStatus

InputPowerStatus

ChargerControlLoops

Charge

Current

Loop

DPPM

Loop

Thermal

Loop

ChargeVoltage

Loop

USBControlLoops

USBInputCurrent

LimitLoop

ACInputCurrent

LimitLoop

SystemVoltage

RegulationLoop

SystemVoltage

RegulationLoop

ACControlLoops

ACSWITCH

BATTERY

SWITCH

USBSWITCH

I2C

REGISTERS

TPS65800

I(AC)/ K

INTAC

I(USB)/ K

INTUSB

I(AC)

I(USB)

LATCH

CHG_UVLO

500Ω

500

OUTSHORT

BATSHORT

VREF

ISET1

SYSTEM STATUS

BAT

DISCHARGE

CIRCUIT

1k

BAT

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

POWER PATH AND CHARGE MANAGEMENT

Overview

The TPS65800 has an integrated charger with power path integrated MOSFETs. This topology, shown in the simplified block diagram below, enables using an external input power to run the system and charge the battery simultaneously. The power path has dual inputs that can be used to select either an external AC_DC adapter (AC pin) or an USB port power (USB pin) to power the end equipment main power rail (OUT pin, also referred to as the system power bus) and charge the battery pack (connected to BAT pin).

Figure 31. TPS65800 Charger and Power Path Section Simplified Block Diagram

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

The power path has three integrated power MOSFETs: the battery to system MOSFET (battery switch), the AC input to system MOSFET (AC switch) and the USB input to system MOSFET (USB switch). Each of those power MOSFETs can be operated either as an ON/OFF switch or as a linear pass element under distinct operating conditions, as defined by the control circuits that set the power MOSFET gate voltage.

The TPS65800 regulates the voltage at the OUT pin to 4.6 V when one of the external supplies connected to pins AC or USB is powering the OUT pin. The selected input (AC or USB pin) current is limited to a value defined by I2C register settings. The input current limit function assures compatibility with USB standard requirements, and also implements a protection function by limiting the maximum current supplied by an external AC_DC adapter or USB port power terminal.

The AC power MOSFET and USB power MOSFET operating modes are set by integrated control loops. Each of the power MOSFETs is controlled by two loops: one system voltage regulation loop and one input current limiting loop. The integrated loops modulate the AC or USB power MOSFETs drain to source resistance to regulate either the OUT pin voltage or to limit the input current. If no input power is present (AC and USB input power not detected) the AC and USB power MOSFETs are turned OFF, and the battery MOSFET is turned ON, connecting the BAT pin to the OUT pin.

The battery switch is turned ON when the AC or USB input power is detected and the charger function is enabled, charging the battery pack. During charge the battery MOSFET switch operation mode is defined by the charger control loops. The battery MOSFET switch drain-to-source resistance is modulated by the charge current loop and charge voltage loop in order to implement the battery charging algorithm. In addition ot that multiple safety functions are activated (thermal shutdown, safety timers, short circuit recovery), and additional functions (thermal loop and DPPM loop) optimize the charging process.

POWER PATH MANAGEMENT FUNCTION

Detecting the System Status

The power path and charge management block operate independently of the other TPS65800 circuits. Internal circuits check battery parameters (pack temperature, battery voltage, charge current) and system parameters (AC and USB voltage, battery voltage detection), setting the power path MOSFETs operating modes automatically. The TPS65800 has integrated comparators that monitor the battery voltage, AC pin voltage, USB pin voltage and the OUT pin voltage. The data generated by those comparators is used by the power path control logic to define which of the integrated power path switches is active. A simplified block diagram for the system status detection is shown below.

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POWERPATH

CONTROL LOGIC

ACDETECTED

USBDETECTED

USBOVP

ACOVP

OUT SHORTED

BAT

SHORTED

OUT LOWER

THANBAT

BATSH

USB

OUT

BAT

OVP

BAT

OUTSH

BAT

OUT

BAT

NOBATT

SHORT

DPPM

1V

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Figure 32. TPS65800 Systems Status Detection, Charger and Power Path Section

Table 4 lists the system power detection conditions. V

, V

IN(DT)

, V

OUTSH

, V

BATSH

OVP

are TPS65800 internal

references, refer to the electrical characteristics for additional details.

Table 4. System Status Detection, Charger and Power Path Section

AC input voltage detected V(AC) – V(BAT) > V USB input voltage detected V(USB) – V(BAT) > V AC overvoltage detected V(AC) > V USB overvoltage detected V(USB) > V AC PIN TO OUT pin OR USB TO OUT PIN short detected V(OUT) < V

OVP

OVP INOUTSH

BAT pin to OUT pin short detected V(BAT) - V(OUT) > V Battery supplement mode need detected V(BAT) – V(OUT) > V Blank BAT to OUT short circuit detection V(DPPM) < 1V

IN(DT)

BATOUTSH

SUP

Power Path Logic: Priority Algorithm

The system power bus supply is automatically selected by the power path control logic, following an internal algorithm. The power path function detects an external input power connection when the input voltage exceeds the battery pack voltage. It also detects a supplement mode need (battery switch must be turned ON) when the system voltage (OUT pin) is below the battery voltage. A connected and non-selected external supply or the battery is automatically switched to the system bus, following the priority algorithm, when the external supply currently selected is disconnected from the system.

The input power priority is hard-wired internally, with the AC input having the higher priority, followed by the USB input (2

) and the battery pack (3

). Using the I2C CHG_CONFIG register control bit CE the user can override the power path algorithm, connecting the battery to the system power bus. Care must be taken when using the battery to system connection option, as the system power bus is not connected back to the AC or USB inputs (even if those are detected) when the battery is removed. Table 5 describes the priority algorithm.

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Table 5. Power Path Control Logic Priority Algorithm

(I2C CHG_CONFIG Register) DETECTED SOURCE

The power path status is stored in register CHG_STAT.

Input Current Limit

The USB input current is limited to the maximum value programmed by the host, using the I2C interface. If the system current requirements exceed the input current limit, the output voltage collapses, the charge current is reduced, and finally the supplement mode is set. The input current limit value is set with the I2C charge control register bits PSEL and ISET2, and it is applied to the USB input ONLY. The AC input current limit is fixed to the internal short circuit limit value.

CE BIT EXTERNAL SUPPLY SWITCH MODE SYSTEM POWER

AC USB AC USB Battery

HI YES NO ON OFF ON if Supplement mode is AC

NO YES OFF ON USB

YES YES ON OFF AC

NO NO OFF OFF BATTERY

LO XX XX OFF OFF ON BATTERY

required, OFF otherwise

Table 6. Charge Current Scaling via I2C

PSEL (I2C) ISET2 (I2C) INPUT CURRENT LIMIT

USB AC

LO LO 100 mA 2.75 A LO HI 500 mA 2.75 A

HI LO 2.75 A 2.75 A HI HI 2.75 A 2.75 A

System Voltage Regulation

The system voltage is regulated to a fixed voltage when one of the input power supplies is connected to the system. The system voltage regulation is implemented by a control loop that modulates the selected switch Rds(on).

The typical system regulation voltage is 4.6 V.

Input Overvoltage Detection

The AC and USB input voltages are monitored by voltage comparators that identify an overvoltage condition. If an overvoltage condition is detected a status register bit is set, indicating a potential fault condition.

When an overvoltage condition is detected the AC or USB switches state is not modified. If any of those switches was ON, it is kept in the ON state. During overvoltage conditions, the system voltage still is regulated, and no major safety issues are observed when not modifying the input switch state.

If the input overvoltage condition results in excessive power dissipation, the thermal shutdown circuit is activated, the AC and USB switches are turned OFF, and the BAT switch is turned ON.

Output Short-Circuit Detection

If the OUT pin voltage falls below an internal threshold V

INOUTSH

the AC and USB switches are turned off and internal pullup resistors are connected from AC pin to OUT pin and USB pin to OUT pin. When the short circuit is removed those resistors enable the OUT pin voltage to rise above the V

INOUTSH

threshold, returning the

system to normal operation.

Battery Short Circuit Detection

If the OUT pin voltage falls below the BAT pin voltage by more than an internal threshold V

BATOUTSH

the battery switch is turned off and internal pullup resistor is connected between the OUT pin and the BAT pin. This resistor enables detection of the short removal, returning the system to normal operation.

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BAT

OUT

V -V

(OUT) (NOBATID)

ANLG1

Battery

I C

TPS65800

PACKID Resistor

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Boot-Up Algorithm

During the initial TPS65800 power-up the contents of the ISET2, CE and SUSPEND bits on the control register are ignored for a time period t set internally to 100 mA max. At the end of t

No Battery Detection Circuit

The ANLG1 pin may be used to detect the connection of an external resistor that is embedded in a battery pack and is used as a pack ID function. The ANLG1 pin has an internal current source connected between OUT and ANLG1, which is enabled automatically when the TPS65800 is not in SLEEP mode. The current levels for ANLG1 pin can be programmed via I2C register ADC_WAIT, bits BATID_n, as shown below:

. During that time the charger is enabled, and the selected input current limit is

BOOT

period the control register settings are implemented.

BOOT

Figure 33. Battery Removal Detection, ANLG1 Pin

An internal comparator with a fixed deglitch time, t V(OUT) - V

NOBATID

a battery removed condition is detected and an internal discharge switch is activated,

DGL(NOBAT)

monitors the ANLG1 pin voltage, if V(ANLG1) >

connecting an internal resistor from BAT pin to AGND1. Note that ANLG1 can also be used as an analog input for the ADC converter, in this case the voltage at pin ANLG1 must never exceed the V(OUT) - V

NOBATID

threshold to avoid undesired battery discharge.

Using the Input Power to Run the System and Charge the Battery Pack

The external supply connected to AC or USB pins must be capable of supplying the system power and the charger current. If the external supply power is not sufficient to run the system and charge the battery pack the TPS65800 executes a two-stage algorithm that prevents a low voltage condition at the system power bus:

1. The charge current is reduced, until the total (charger + system current) is at a level that can be supplied by the external input supply. This function is implemented by a dedicated charger control loop (see DPPM section in charger functional description for additional details).

2. The battery switch is turned ON if the charge current is reduced to zero and the input current is not enough to run the system. In this mode of operation both the battery and the external input power supply the system power ( supplement operation mode).

The supplement operation mode is automatically set by the TPS65800 when the input power is switched to the OUT pin, and the OUT pin voltage falls below the battery voltage.

BATTERY CHARGE MANAGEMENT FUNCTION

Operating Modes

The TPS65800 supports charging of single-cell Li-Ion or Li-Pol battery packs. The charge process is executed in three phases: precharge (or preconditioning), constant current and constant voltage.

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Batteryvoltage,

V(BAT)

Charge

Complete

Status,

Charger

Off

Pre-

conditioning

Phase

Current

Regulation

Phase

VoltageRegulationand

ChargeTermination

Phase

PRE-CHARGE CURRENT AND TERMINATION THRESHOLD

BatteryCurrent,

I(BAT)

O(BATREG)

(LOWV)

(PRECHG)

(CHG)

FAST-CHARGE

CURRENT

O(BAT)

O(PRECHG),I(TERM)

DONE

BAT

ISET 1

I /K

(OUT) (SET)

OUT

ChargeVoltage

Loop

Battery Switch

SystemVoltage RegulationLoop

VREF

Thermal Loop

VTJ

(OUT)

(BAT)

O(REG)

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

The charge parameters are selectable via I2C interface and using external components. The charge process starts when an external input power is connected to the system, the charger is enabled by the I2C register CHG_CONFIG bits CE=HI and CHGON=HI, and the battery voltage is below the recharge threshold, V(BAT) < V

. When the charge cycle starts a safety timer is activated. The safety timer timeout value is set by an

(RCH)

external resistor connected to TMR pin. When the charger is enabled two control loops modulate the battery switch drain to source impedance to limit

the BAT pin current to the programmed charge current value (charge current loop) or to regulate the BAT pin voltage to the programmed charge voltage value (charge voltage loop). If V(BAT) < 3 V (typ) the BAT pin current is internally set to 10% of the programmed charge current value. A typical charge profile is shown below, for an operation condition that does not cause the IC junction temperature to exceed 125 ° C (typ).

Figure 34. Typical Charge Cycle, Thermal Loop not Active

If the operating conditions cause the IC junction temperature to exceed 125 ° C the charge cycle is modified, with the activation of the integrated thermal control loop. The thermal control loop is activated when an internal voltage reference, which is inversely proportional to the IC junction temperature, is lower than a fixed, temperature stable internal voltage. The thermal loop overrides the other charger control loops and reduces the charge current until the IC junction temperature returns to 125 ° C, effectively regulating the IC junction temperature.

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Battery Voltage, V(BAT)

Charge

Complete

Status,

Charger

Off

Pre-

conditioning

Phase

Current

Regulation

Phase

VoltageRegulationand

ChargeTermination

Phase

PRE-CHARGE CURRENT AND TERMINATION THRESHOLD

BatteryCurrent,

I(BAT)

O(BATREG)

(LOWV)

(PRECHG)

(CHG)

FAST-CHARGE

CURRENT

O(BAT)

O(PRECHG),I(TERM)

DONE

Thermal

Regulation

Phase

ICJunction

Temperature, Tj

(THREG)

O(PRECHG)

PRECHG

SET

O(BAT)

SET

A modified charge cycle, with the thermal loop active, is shown here:

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Figure 35. Typical Charge Cycle, Thermal Loop Active

Battery Preconditioning

The TPS65800 applies a precharge current I

o(PRECHG)

to the battery if the battery voltage is below the V threshold, preconditioning deeply discharged cells. The charge current loop regulates the ISET1 pin voltage to an internal reference value, V

. The resistor connected between the ISET1 and AGND pins, R

PRECHG

determines the precharge rate. The precharge rate programmed by R

is always applied to a deeply discharged battery pack, independently

SET

of the input power selection (AC or USB). The precharge current can be calculated as follows:

where:

is the charge current scaling factor and V

SET

PRECHG

is the precharge set voltage.

CONSTANT-CURRENT CHARGING

The constant charge current mode (fast charge) is set when the battery voltage is higher than the precharge voltage threshold. The charge current loop regulates the ISET1 pin voltage to an internal reference value, V The fast charge current regulation point is defined by the external resistor connected to the ISET1 pin, R shown in the following:

where:

(2.5 V typ) is the voltage at ISET1 pin during charge current regulation and K

SET

Scaling Factor.

The reference voltage V be selected as a percentage (75%, 50% or 25%) of the original 2.5 V typ, non-attenuated V

can be reduced via I2C register CHG_CONFIG bits ISET1_1 and ISET1_0. V

SET

= Charge Current

value, effectively

scaling down the charge current.

(LOWV)

SET

(2)

SET

, as

SET

(3)

can

SET

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2.75 A

500 mA

200 mA

750 mA

800 mA

300 mA

-250 mA

SYSTEMLOAD

INPUT

CURRENT

BATTERY

CHARGE

CURRENT

BATTERY

CHARGING,

USBINPUT LIMIT

SET TO 2.75 A

BATTERY

CHARGING,

INPUT LIMIT SET

TO 500 mA

BATTERY

DISCHARGING,

SUPPLEMENT

MODESET

(800mA DEFINED

BY RSET VALUE)

I(USB)

I(OUT )

TERM

SET

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

The ISET1 resistor always sets the maximum charge current, if the AC input is selected. When the USB input is selected, the maximum charge current is defined by the USB input current limit and the programmed charge current. If the USB input current limit is lower than the I

O(OUT)

region and the charge current is defined by the input current limit value and system load, as shown in the following curves:

value, the battery switch is set in the dropout

Figure 36. Input Current Limit Impact on Effective Charge Current

CHARGE TERMINATION AND RECHARGE

The TPS65800 monitors the charging current during the voltage regulation phase. Charge is terminated when the charge current is lower than an internal threshold, set to 10% (typ) of the fast charge current rate. The termination point applies to both AC and USB charging, and it can be calculated as follows:

where

is the termination detection voltage reference.

TERM

The voltage at ISET1 pin is monitored to detect termination, and termination is detected when V(SET1) < V (0.25 V typ). The voltage reference V modified if the reference voltage V V

is reduced by the same percentage used to scale down V

TERM

SET

is internally set to 10% of the V

TERM

reference voltage, and it is

SET

is scaled via I2C register CHG_CONFIG bits ISET1_1 and ISET1_0.

SET

The table below shows charge current and termination thresholds for a 1-A charge current set (1-k Ω resistor connected to ISET1 pin), with the selected input current limit set to a value higher than the programmed charge current. The termination current is scaled for all charge current modes (AC or USB), as it is always set by the ISET1 pin external resistor value.

Table 7. Charge Current and Termination Threshold Selection Example

programmed by ISET1 resistor) (V) (mV) Current (A) Current (mA)

Charge Control Register Bits Charge Current, (% of typical value Vset Vterm Charge Termination

ISET1_1 ISET1_0

0 0 25% 0.6 60 0.24 20 0 1 50% 1.25 115 0.5 40 1 0 75% 1.9 160 0.78 60 1 1 100% 2.5 250 1 100

(4)

TERM

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DPPM

+ R

DPPM

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Once termination is detected, a new charge cycle starts if the voltage on the BAT pin falls below the V

(RCH)

threshold. A new charge start is also triggered if the charger is enabled/disabled/enabled via I2C (CHG_CONFIG register bits CE or CHGON), or if both AC and USB input power are removed and then at least one of them is re-inserted.

The termination is disabled when the thermal loop OR DPPM loop are active, and during supplement mode.

BATTERY VOLTAGE REGULATION, CHARGE VOLTAGE

The voltage regulation feedback is Implemented by sensing the BAT pin voltage, which is connected to the positive side of the battery pack. The TPS65800 monitors the battery-pack voltage between the BAT and AGND1 pins, when the battery voltage rises to the V

threshold the voltage regulation phase begins and the

O(REG)

charging current tapers down. The charging voltage can be selected as 4.2 V or 4.365 V (typ). The default power-up voltage is 4.2 V. As a

safety measure the 4.365 V charge voltage is programmed only if two distinct bits are set via I2C: VCHG = HI in the CHG_CONFIG, and CHG_VLTG=LO in the GPIO3 register.

TEMPERATURE QUALIFICATION

The TPS65800 continuously monitors battery temperature by measuring the voltage between the TS and AGND1 pins. An internal current source provides the bias for a negative-temperature coefficient thermistor (NTC), and the TS pin voltage is compared to the window set by internal thresholds V if charging is allowed. A voltage outside the V

to V

LTF

window is considered a temperature fault, and charge

HTF

and V

LTF

to determine

HTF

is suspended. Charge resumes when the temperature returns to the valid window range. With a 50-k Ω (at 25 ° C) thermistor, the valid temperature window is set between 0 ° C to 45 ° C. The temperature

window can be enlarged by adding external resistors to the TS pin application circuit.

DYNAMIC POWER PATH MANAGEMENT

Under normal operating conditions, the OUT pin voltage is regulated when the AC or USB pin is powering the OUT pin and the battery pack is being charged. If the total (system + charge current) exceeds the available input current, the system voltage drops below the regulation value.

The dynamic power path management function monitors the system output voltage. A condition where the external input supply rating has been exceeded or the input current limit has been reached is detected when the OUT pin voltage drops below an user-defined threshold, V

DPPM

where:

= external resistor connected to DPPM pin

DPPM

= DPPM scaling factor

DPPM

= DPPM pin internal current source

DPPM

To correct this situation the DPPM loop reduces the charge current, regulating the OUT pin voltage to the user-defined V

threshold. The DPPM loop effectively identifies the maximum current that can be delivered

DPPM

by the selected input and dynamically adjusts the charge current to guarantee that the end equipment is always powered. In order to minimize OUT voltage ripple during DPPM operation the V

threshold should be set just

DPPM

below the system regulation voltage. If the charge current is reduced to zero by the DPPM and the input current is still lower than the OUT pin load,

the output voltage falls below the DPPM threshold, decreasing until the battery supplement mode is set [V(OUT) = V(BAT) – V

SUP(DT)

CHARGER OFF MODE

The TPS65800 charger circuitry enters the low-power OFF mode if both AC and USB power are not detected. This feature prevents draining the battery during the absence of input supply.

(5)

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

PRECHARGE SAFETY TIMER

The TPS65800 activates an internal safety timer during the battery preconditioning phase. The precharge safety timer time-out value is set by the external resistor connected to TMR pin, RTMR, and the timeout constants K and K

The K When the charger is in suspend mode, set via I2C register CHG_CONFIG bit CHGON or set by a pack

temperature fault, the precharge safety timer is put on hold (i.e., charge safety timer is not reset). Normal operation resumes when the charger exits the suspend mode. If V(BAT) does not reach the internal voltage threshold V

If the TMR pin is left floating and internal resistor, 50K Ω typ, is used to generate the timebase used to set the precharge timeout value. The typical precharge timeout value can be then calculated as:

PRECHG

CHARGE SAFETY TIMER

As a safety mechanism the TPS65800 has a user-programmable timer that measures the total fast charge time. This timer (charge safety timer) is started at the end of the preconditioning period. The safety charge timeout value is set by the value of an external resistor connected to the TMR pin (R time-out value is calculated as follows:

When the charger is in suspend mode, set via I2C register CHG_CONFIG bit CHGON or set by a pack temperature fault, the charge safety timer is put on hold (i.e., charge safety timer is not reset). Normal operation resumes when the charger exits the suspend mode. If charge termination is not reached within the timer period a fault condition is detected, and the charger is turned off.

The charge safety timer is held in reset if the TMR pin is left floating. Under this mode of operation an internal resistor, 50K Ω typ, sets the internal charger and power path deglitch and delay times, as well as the precharge safety timer timeout value.

TMR

PRECHG

PRE

CHG

= K

× R

PRE

× K

TMR

constant typical value is 0.1, setting the precharge timer value to 10% of the charge safety timer value.

PRECHG

= K

within the precharge timer period a fault condition is detected and the charger is turned off.

× 50K × K

PRE

× R

TMR

). The charge safety timer

TMR

PRE

TIMER FAULT RECOVERY

The TPS65800 provides a recovery method to deal with timer fault conditions. The following summarizes this method:

• Condition 1: Charge voltage above recharge threshold, V

, and timeout fault occurs.

RCH

Recovery method: The IC waits for the battery voltage to fall below the recharge threshold. This could happen as a result of a load on the battery, self-discharge or battery removal. Once the battery falls below the recharge threshold, the IC clears the fault and starts a new charge cycle.

• Condition 2: Charge voltage below recharge threshold,V

, and timeout fault occurs.

(RCH)

Recovery method: Under this scenario, the IC connects an internal pullup resistor from OUT pin to Bat pin. This pullup resistor is used to detect a battery removal condition and remains on as long as the battery voltage stays below the recharge threshold. If the battery voltage goes above the recharge threshold, the IC disables the pullup resistor connection and executes the recovery method described for condition 1.

All timers are reset and all timer fault conditions are cleared when a new charge cycle is started either via I2C (toggling CHG_CONFIG bits CE, CHGON) or by cycling the input power. All timers are reset and all timer fault conditions are cleared when the TPS65800 enters the UVLO mode.

DYNAMIC TIMER FUNCTION

The charge and precharge safety timers are programmed by the user to detect a fault condition if the charge cycle duration exceeds the total time expected under normal conditions. The expected total charge time is usually calculated based on the fast charge current rate.

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1 2

TIMERINTERNAL CLOCKPERIOD

MULTIPLICATIONFACTOR

V(SET1)V(ISET1)

V(SET)V(PRECHG)

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

When the thermal loop or the DPPM loops are activated the charge current is reduced, and a false safety timer fault can be observed if this mode of operation is active for a long periods. To avoid this undesirable fault condition the TPS65800 activates the dynamic timer function when the DPPM and thermal loops are active. The dynamic timer function slows down the safety timers clock, effectively adding an extra time to the programmed timeout value as follows:

1. If the battery voltage is below the battery depleted threshold: the precharge timer value is modified while the thermal loop or the DPPM loop are active

2. If the battery voltage is above the precharge threshold: the safety timer value is modified if the DPPM or the thermal loop are active AND the battery voltage is below the recharge threshold.

The TPS65800 dynamic timer function circuit monitors the voltage at pin ISET1 during precharge and fast charge. When the charger is regulating the charge current, the voltage at pin ISET1 is regulated by the control loops to either V than V V

SET

or V

SET

/V(ISET1) ratio (fast charge) or V

The maximum clock period is internally limited to twice the value of the programmed clock period, which is defined by the resistor connected to TMR pin, as shown in the following figure:

or V

SET

, and the dynamic timer control circuit changes the safety timers clock period based on the

PRECHG

. If the thermal loop or DPPM loops are active, the voltage at pin ISET1 is lower

PRECHG

/V(ISET1) ratio (precharge).

PRECHG

The effective charge safety timer value can then be expressed as follows:

Where the added timeout values, t thermal loop or DPPM loops were active. The maximum added timeout value is internally limited to 2 × t 2 × t

CHARGE AND SYSTEM POWER MANAGEMENT — I2C REGISTERS

The I2C registers that control charger and power path related functions are shown below. The HEX address for each register is shown by the register name, together with the R or W functionality for the register bits. Shaded values indicate default initial power-up values. Note that the CHG_STAT register contents are valid only when either AC or USB power are applied to the TPS65800. The output of linear regulator LDO_PM can be used as an indicator of external input power detection; if LDO_PM is in regulation the CHG_STAT register contents are valid.

Effective precharge timeout = t Effective charge safety timeout = t

(PRECHG)

Figure 37. Safety Timer Internal Clock Slowdown

(CHG)

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+ t

(PCHGADD)

+ t

(CHGADD)

, t

(CHGADD),

are equal to the sum of all time periods when either the

(PRECHG)

(PCHGADD)

(CHG)

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

CHG_CONFIG, ADDRESS=9, ALL BITS R/W

B7 B6 B5 B4 B3 B2 B1 B0

Bit name VCHG CHGON NOT USED ISET1_1 ISET1_0 ISET2 PSEL CE Function CHARGE SUSPEND NOT USED CHARGE CURRENT SCALING USB SELECTED SYSTEM

When 0 4.36 V CHARGE NOT USED 00= 0.25 10=0.75 100 mA USE USB BATTERY TO

When 1 4.2 V CHARGE ON NOT USED 500 mA INPUT INPUT POWER

(1) The CE bit state is latched inside the charger control logic (CE latch) during an OUT pin UVLO event, prior to resetting the charge

control register bit CE to its power up default value. The charger CE latch controls the charger and power path state as long as the TPS65800 is in UVLO mode and an external supply is connected to the charger block. The CE latch is reset to its power-up value (CE=HI) only when the input power is removed from the charger block. The CE latch is disabled and the CE charge control register bit sets the charger and power path MOSFETs state when the TPS65800 exits the UVLO mode. This feature avoids a host software loop when the host algorithm requires a depleted (or absent) battery to be connected to the system bus while input power is present.

GPIO3, ADDRESS = 1C, ALL BITS R/W. NOTE: ONLY BIT B4 CONTROLS CHARGER-RELATED FUNCTIONALITY.

Bit name GPIO3i/O GPIO3_LEVEL LDO0_ENABLE CHARGE _VLTG NOT USED GPIO2 _INTSRC GPIO1 _INTSRC GPIO2 _SM2 Function SEE SEE Table 15 SEE Table 15 CHARGE NOT USED SEE Table 15 SEE Table 15 SEE Table 15

When 0 4.2 V When 1 4.36 V

VOLTAGE CHARGE FACTOR CURRENT INPUT POWER

SELECTION LIMIT CURRENT SELECTION

SUSPENDED 01= 0.5 11= 1 CURRENT SYSTEM

Note: Relative to Charge Current LIMIT Programmed by external ISET pin resistor.

B7 B6 B5 B4 B3 B2 B1 B0

Table 15 VOLTAGE

SELECTION

SAFETY BIT

LIMIT

CURRENT TO SYSTEM

LIMIT SET TO

MAXIMUM

(1)

CHG_STAT, ADDRESS = A, ALL BITS READ ONLY. POWER-UP DEFAULTS SHOW SYSTEM STATUS WHEN EXITING POWER DOWN.

B7 B6 B5 B4 B3 B2 B1 B0

Bit name BAT_STAT Function BATTERY SELECTED THERMAL AC INPUT USB INPUT CHARGE STATUS AC OR USB

SUPPLEMENT INPUT LOOP AND POWER POWER INPUT OVP

MODE STATUS POWER DPPM STATUS STATUS DETECTION

When 0 SUPPLEMENT AC INPUT BOTH OFF AC NOT USB NOT 00 = FAULT/OFF/SUSPEND NO OVP

When 1 SUPPLEMENT USB INPUT DPPM ON OR AC USB OVP

(1) The battery supplement is entered when V

power bus current exceeds the input current limit or the external supply current capability, the supplement mode is set. An oscillatory

(1) (2)

INPUT _PWR THDPPM_ON ACPG

STATUS STATUS

MODE OFF SELECTED DETECTED DETECTED 01 = CHARGE DONE

MODE ON SELECTED THERMAL ON DETECTED DETECTED DETECTED

– V

(BAT)

> 60 mV (typ), and it ends when V

(OUT)

(3)

USBPG

STAT1 STAT2 INP_OV

10 = FAST CHARGE ON 11 = PRECHARGE ON

– V

(BAT)

< 20 mV. When the system

(OUT)

behavior for BAT_STAT bit can happen if the battery switch dropout voltage is less than 20 mV (typ) when in supplement mode. (2) The BAT_STAT is always masked internally, and does not generate interrupts. (3) The ACPG and USBPG bits have valid data only when V

(LDO_PM)

> 2.0 V.

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RT C_O UT

SIM

LDO1

LDO 2

LDO3

VIN_ LDO3 5

LDO4

L DO35_R EF

L DO_P M

AG ND 2

VIN_L DO12

L DO5

AG ND1

LDO0

HIG H PSR R L DO S

OU T

TPS65800

ON /OFF , OutputVoltage

DischargeControl

ON /OFF

OutputVoltage

I2C

REG ISTER S

3.3V

10mA

1.224-4.4V 100mA

1.8V/3V 8mA

1.224-4.4V 100mA

1.25-3.3V 150mA

3.1V 8mA

3.3V

150mA

1.25-3.3V 150mA

1.224-4.4V 100mA

C142.2 Fm

C111 Fm

C120.1 Fm

C132.2 Fm

C71

C152.2 Fm

C51 F

C32.2 Fm

C4100mF

C84.7

C104.7 Fm

C94.7 Fm

C64.7 Fm

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

FUNCTIONALITY GUIDE — LINEAR REGULATORS

SELECTABLE OUTPUT VOLTAGE LDO

Supply ON/OFF Output Discharge OUTPUT VOLTAGE (V), set via I2C IO Max Acc Power Up

LDO1 Yes, set via Yes, enabled via I2C 8 1.25/1.5/1.8/2.5/2.85/3/3.2/3.3 150 3 ON, 2.85 V

LDO2 Yes, set via Yes, enabled via I2C 8 1.25/1.5/1.8/2.5/2.85/3/3.2/3.3 150 3 ON, 3.3 V

SIM Yes, set via No 2 1.8 / 3 8 2 OFF, 1.8 V

PROGRAMMABLE OUTPUT VOLTAGE LDO

Supply ON/OFF Output Discharge OUTPUT VOLTAGE (V), set via I2C IO Max Acc Power Up

LDO3 Yes, set via Yes, enabled via I2C 1.224–4.46 128 25 mV 100 3 ON, 1.25 V

LDO4 Yes, set via Yes, enabled via I2C 1.224–4.46 128 25 mV 100 3 ON, 2.75 V

LDO5 yes, set via I2C Yes, enabled via I2C 1.224–4.46 128 25 mV 100 3 ON, 2.81 V

FIXED OUTPUT VOLTAGE LDO’S

Supply ON/OFF Control OUTPUT IO Max (mA) Acc % Power Up Default

RTC_OUT Yes, via I2C 3.1, fixed 8 5 ON

LDC0 3.3, fixed 150 3 OFF

LDO_PM NO, enabled internally 3.3, fixed 20 5 ON if AC or USB power detected

Control Switch (mA) % Default

# of Steps Available Values (V)

I2C

Control Switch (mA) % Default

Range # of Steps Min Step

I2C

VOLTAGE (V)

Figure 38. Required External Components, Recommended Values, External Connections

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SHORT CIRCUIT

PROTECTION

BIAS

CONTROL

LDO3-5 ONLY

DISCHARGE

CONTROL

LDO1, LDO2,

LDO3-5 ONLY

VREF

INPUT SUPPLY

OUTPUT

VOLTAGE

SETTING

Programmable

LDOsonly

ON/OFF

CONTROL

AllLDOs

except

LDO_PM

DISCHARGE

CONTROL

ENABLE

LDO1, LDO2,

LDO3-5 ONLY

I2C

REGISTERS

OUTPUT VOLTAGE

OUTPUT

CURRENT

SAMPLE

OUTPUT

VOLTAGE

SAMPLE

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

LINEAR REGULATORS — FUNCTIONAL DESCRIPTION

The TPS65800 offers nine integrated linear regulators, designed to be stable over the operating load range with use of external ceramic capacitors, as long as the recommended filter capacitor values (see application diagram and pinout description) are used. The output voltage can be programmed via I2C (LDO0-2, LDO3-5) or have a fixed output voltage.

Simplified Block Diagram

A simplified block diagram for the LDOs is shown in Figure 39 .

Figure 39. Simplified Block Diagram

Connecting the LDO Input Supply

Both LDO1-2 and LDO3-5 have uncommitted input power supply pins (VIN_LDO12, VIN_LDO35), which should be externally connected to the OUT pin. Optionally the LDO0-2 and LDO3-5 input supplies can be connected to the output of the available buck converters SM1 or SM2, as long as the resulting overall power-up sequence meets the system requirements.

The RTC_OUT, SIM, LDO0 and LDO_PM linear regulators are internally connected to the OUT pin.

ON/OFF Control

All the LDO’s, with exception of LDO_PM LDO, have a ON/OFF control which can be set via I2C commands, facilitating host management of the distinct system power rails. The LDO_PM LDO On/OFF control is internally hard-wired, and it is set to ON when either the AC or USB input power is detected.

Output Discharge Switch

LDO1, LDO2 AND LDO3-5 have integrated switches that discharge each output to ground when the LDO is set to OFF by an I2C command. The output discharge switch function can be disabled by using I2C register control bits. The discharge switches are enabled after the initial power-up

Special Functions

The RTC_OUT, SIM (Subscriber line interface module) and LDO_PM linear regulators are designed to support lower load currents. The SIM and RTC_LDO have low leakage in OFF mode, with the input pin voltage above or below the output pin voltage. The LDO_PM can be used for USB enumeration, or a status indication of input power connection.

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Output Voltage Monitoring

Internal power good comparators monitor the LDO outputs and detect when the output voltage is below 90% of the programmed value. This information is used by the TPS65800 to generate interrupts or to trigger distinct operating modes, depending on specific I2C register settings. See interrupt and sequencing controller section for additional details.

LINEAR REGULATORS — I2C REGISTERS

The I2C registers that control LDO-related functions are shown below. The HEX address for each register is shown by the register name, together with the R or W functionality for the register bits. Shaded values indicate default initial power-up values.

B7 B6 B5 B4 B3 B2 B1 B0

EN_LDO: ADRESS = B, ALL BITS R/W Bit name LDO1_EN LDO2_EN LDO3_EN LDO4_EN LDO5_EN SIM_SET SIM EN1 RTC_EN Function LDO1 … 5 ON/OFF CONTROL SIM LDO output SIM/RTC ON/OFF CONTROL

When 0 OFF OFF OFF OFF OFF 3.0 V OFF OFF When 1 ON ON ON ON ON 1.80 V ON ON LDO12: ADRESS = C, ALL BITS R/W Bit name LDO1_DISCH LDO1_2 SET LDO1_1 SET LDO1_0 SET LDO2_DISCH LDO2_2 SET LDO2_1 SET LDO2_0 SET Function LDO1 output LDO1 OUTPUT VOLTAGE SETTING LDO2 Output LDO2 OUTPUT VOLTAGE SETTING

When 0 OFF 000 = 1.25 V 001 = 1.5 V Default = 2.85 V OFF 000 = 1.25 V 001 = 1.5 V Default = 3.3 V When 1 ON ON

LDO3, ADDRESS = D, ALL BITS R/W Bit name LDO3_DISCH LDO3_6 SET LDO3_5 SET LDO3_4 SET LDO3_3 SET LDO3_2 SET LDO3_1 SET LDO3_0 SET Function LDO3 output LDO3 OUTPUT VOLTAGE SETTING

When 0 OFF SeeTable 8 for LDO3-5 output voltage setting, power-up default = 1.25 V When 1 ON LDO4, ADRESS = E, ALL BITS R/W Bit name LDO4_DISCH LDO4_6 SET LDO4_5 SET LDO4_4 SET LDO4_3 SET LDO4_2 SET LDO4_1 SET LDO4_0 SET Function LDO4 output LDO4 OUTPUT VOLTAGE SETTING

When 0 OFF See Table 8 for LDO3-5 output voltage setting, power-up default = 2.75 V When 1 ON LDO5, ADRESS = F, ALL BITS R/W Bit name LDO5_DISCH LDO5_6 SET LDO5_5 SET LDO5_4 SET LDO5_3 SET LDO5_2 SET LDO5_1 SET LDO5_0 SET Function LDO5 output LDO5 OUTPUT VOLTAGE SETTING

When 0 OFF See Table 8 for LDO3-5 output voltage setting, power-up default = 2.81 V When 1 ON GPIO3, ADDRESS = 1C, ALL BITS R/W. NOTE: ONLY BIT B5 CONTROLS LDO-RELATED FUNCTIONALITY Bit name GPIO3i/O GPIO3 LEVEL LDO0 ENABLE CHARGE NOT USED GPIO2 _INTSRC GPIO1 _INTSRC GPIO2 _SM2

Function SEE Table 15 SEE Table 15 LDO0 ON/OFF SEE NOT USED SEE Table 15 SEE Table 15 SEE Table 15

When 0 LDO0 OFF When 1 LDO0 ON

discharge switch discharge

enable switch enable

010 = 1.8 V 011 = 2.5 V 010 = 1.8 V 011 = 2.5 V 100 = 2.85 V 110 = 3 V 100 = 2.85 V 110 = 3 V 110 = 3.2 V 111 = 3.3 110 = 3.2 V 111 = 3.3 V

discharge switch

enable

discharge switch

enable

discharge switch

enable

_VLTG

CONTROL CHARGER

SECTION

Battery Voltage

Regulation,

Charge Voltage

voltage

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Table 8. LDO 3–5 Programming Step Values

Step B6–B0 Vset Step B6–B0 Vset Step B6–B0 Vset Step B6-B0 Vset

0 000 0000 1.224 32 010 0000 2.040 64 100 0000 2.015 96 110 0000 2.856 1 000 0001 1.250 33 010 0001 2.066 65 100 0001 2.040 97 110 0001 2.882 2 000 0010 1.275 34 010 0010 2.091 66 100 0010 2.907 98 110 0010 3.723 3 000 0011 1.301 35 010 0011 2.117 67 100 0011 2.933 99 110 0011 3.749 4 000 0100 1.326 36 010 0100 2.142 68 100 0100 2.958 100 110 0100 3.774 5 000 0101 1.352 37 010 0101 2.168 69 100 0101 2.984 101 110 0101 3.800 6 000 0110 1.377 38 010 0110 2.193 70 100 0110 3.009 102 110 0110 3.825 7 000 0111 1.403 39 010 0111 2.219 71 100 0111 3.035 103 110 0111 3.851 8 000 1000 1.428 40 010 1000 2.244 72 100 1000 3.060 104 110 1000 3.876

9 000 1001 1.454 41 010 1001 2.270 73 100 1001 3.086 105 110 1001 3.902 10 000 1010 1.479 42 010 1010 2.295 74 100 1010 3.111 106 110 1010 3.927 11 000 1011 1.505 43 010 1011 2.321 75 100 1011 3.137 107 110 1011 3.953 12 000 1100 1.530 44 010 1100 2.346 76 100 1100 3.162 108 110 1100 3.978 13 000 1101 1.556 45 010 1101 2.372 77 100 1101 3.188 109 110 1101 4.004 14 000 1110 1.581 46 010 1110 2.397 78 100 1110 3.213 110 110 1110 4.029 15 000 1111 1.607 47 010 1111 2.423 79 100 1111 3.239 111 110 1111 4.055 16 001 0000 1.632 48 011 0000 2.448 80 101 0000 3.264 112 111 0000 4.080 17 001 0001 1.658 49 011 0001 2.474 81 101 0001 3.290 113 111 0001 4.106 18 001 0010 1.683 50 011 0010 2.499 82 101 0010 3.315 114 111 0010 4.131 19 001 0011 1.709 51 011 0011 2.525 83 101 0011 3.341 115 111 0011 4.157 20 001 0100 1.734 52 011 0100 2.550 84 101 0100 3.366 116 111 0100 4.182 21 001 0101 1.760 53 011 0101 2.576 85 101 0101 3.392 117 111 0101 4.208 22 001 0110 1.785 54 011 0110 2.601 86 101 0110 3.417 118 111 0110 4.233 23 001 0111 1.811 55 011 0111 2.627 87 101 0111 3.443 119 111 0111 4.259 24 001 1000 1.836 56 011 1000 2.652 88 101 1000 3.468 120 111 1000 4.284 25 001 1001 1.862 57 011 1001 2.678 89 101 1001 3.494 121 111 1001 4.310 26 001 1010 1.887 58 011 1010 2.703 90 101 1010 3.519 122 111 1010 4.335 27 001 1011 1.913 59 011 1011 2.729 91 101 1011 3.545 123 111 1011 4.361 28 001 1100 1.938 60 011 1100 2.754 92 101 1100 3.570 124 111 1100 4.386 29 001 1101 1.964 61 011 1101 2.780 93 101 1101 3.596 125 111 1101 4.412 30 001 1110 1.989 62 011 1110 2.805 94 101 1110 3.621 126 111 1110 4.437 31 001 1111 2.015 63 011 1111 2.831 95 101 1111 3.647 127 111 1111 4.463

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PGND 1

SM2

VIN_ SM1

VIN_ SM2

PGND 2

SM1

SYNCBUCK

OUT

TPS65800

OperatingMode

OutputVoltage

PhaseControl

DischargeControl

OperatingMode

OutputVoltage

PhaseControl

DischargeControl

I2CREGISTERS

LSM 1

LSM 2

1.0-3.4V 600mA

0.6-1.8V 600mA

3.3 Hm

O(SM2)

C20 10 Fm

C19 10 Fm

O(SM1)

C22 10 Fm

C21 10 Fm

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

FUNCTIONALITY GUIDE — SWITCHED MODE STEP-DOWN CONVERTERS

BUCK CONVERTERS, I2C PROGRAMMABLE OUTPUT VOLTAGE

Supply PFM Mode Standby IO Max PWM Freq SLEW RATE, mV/ µ S, Set Power Up Default

SM1 PFM/PWM Standby 0.6-1.8 32 40 mV 3 600 1.5MHz, 0 ° 0, 0.24 8 0.24 ON, skip mode off,

with mode to 15.36 PWM only, 1.24

automatic with V(on/sby),

mode distinct 15.36mV/ µ S

selection or voltage

PWM only. available

SM2 Mode of 1.0-3.4 32 80mV 3 600 1.5MHz, 0, 8 0.48 ON, skip mode on,

operation set 0/90/180 0.48- PWM/PFM, 1.8 V via I2C

Mode (mA) and Phase

Standby

mode set

via I2C or with

GPIO pin

OUTPUT VOLTAGE (V), Set via I2C,

Separate Settings for Normal or via I2C

Standby Mode

Range # of Steps Min Acc Range # of Min

Step (%) Steps Step

270 ° , with 30.72 (on/sby), 180 ° , respect to 30.72mV/ µ S

SM1, set via

I2C

Figure 40. Required External Components, Recommended Values, External Connections

STEP-DOWN SWITCHED MODE CONVERTERS: SM1 and SM2

The TPS65800 has two highly efficient step down synchronous converters. The integration of the power stage switching MOSFETs reduces the external component count, and only the external output inductor and filter capacitor are required. The integrated power stage supports 100% duty cycle operation. Multiple operation modes are available, enabling optimization of the overall system performance under distinct load conditions.

The converters have two modes of operation: a 1.5 MHz fixed frequency pulse width modulation (PWM) mode at moderate to heavy loads, and a pulse frequency modulation (PFM) mode at light loads. The converter output voltage is programmable via I2C registers SM1_SET1 and SM2_SET1.

When the SM1/SM2 converters are disabled an integrated switch automatically discharges the converter output capacitor. The discharge switch function can be disabled by setting the control bits DISCHSM1 and DISCHSM2 to LO, in I2C registers SM1_SET2 and SM2_SET2.

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GATE

CONTROL

LOGIC

SM1 OUTPUT

VOLTAGESETTING

SM1/SM2 PHASE

CONTROL

I2C

REGISTERS

SM1 OPERATING

MODE:

ON/OFF,

PWM, PFM, S TANDBY

SM1 DISCHARGE SWITCHENABLE , LOWPFMRIPPLE

PGND1

VIN_SM1

SM1

SM2 OUTPUT

VOLTAGESETTING

PGND2

VIN_SM2

SM2

SM 1 CONVERTER

3.3 Hµ

10 Fµ

O(SM1)

10 Fµ

3.3 Hµ

10 Fµ

O(SM2)

10 Fµ

OUT

29 Ω

V( VIN _S M1)

39 Ω

V(VIN_SM1)

SET

RESET

OUT

EN_PFM

POWERSTAGE

CURRENT COMPARATORS

I(L1)

SM1

CONTROL

LOGIC

EN_PFM EN_PWM EN_ALL

DCHGON

SM2 OPERATING

MODE:

ON/OFF,

SM1 DISCHARGE SWITCHENABLE , LOWPFMRIPPLE

TPS65800

LSM1

LSM2

C21

C22

C19

C20

PWMCONTROL

PFMCONTROL

PFMON

PWMON

DAC

EN_PWM

SM2CONVERTER

SAMETOPOLOGY ASSM1CONVERTER

PWM, PFM, S TANDBY

PFM(LEAVE)

V(VIN_SM3)

29 W

PFM(ENTER)

V(VIN_SM3)

39 W

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Figure 41. SM1/SM2 Converter

The TPS65800 SM1 and SM2 buck converters can be set to operate only in PWM mode or to switch automatically between PFM and PWM modes. The average load current is monitored, and the PFM mode is set if the average load current is below the threshold IPFM(ENTER). When in PFM mode the load current is also monitored, and the PWM mode is set when the load current exceeds the threshold I

PFM(LEAVE)

. The thresholds for automatic PFM/PWM switching are calculated as shown in Equation 6 for the SM1 converter, the same thresholds apply to the SM2 converter by replacing VIN_SM1 by VIN_SM2:

The automatic switching mode is enabled via the control bits PFM_SM1 and PFM_SM2 on I2C registers SM1_SET1 and SM2_SET1.

Output Voltage Slew Rate

I2C registers enable setting the output voltage slew rate, when transitioning from one programmed voltage to a new programmed voltage value. These events can be triggered by a new output voltage selection or by switching from a low power mode (standby) to a normal operating mode. During a transition, the output voltage is stepped from the currently programmed voltage to the new target voltage. The slew rate from the initial voltage to the final voltage can be selected using I2C registers, SM1_SET2 and SM2_SET2, ranging from 0.24 mv/ µ s to 15.36 mV/ µ s for the SM1 converter and 0.48 to 30.72 mV/ µ S for the SM2 converter. If the slew rate is set to OFF, the output voltage goes from the current value to the programmed value in a single step.

During the transition to standby mode the Power Good comparators are disabled.

(6)

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V(VIN_SM1) v V(SM1)) I(L1)ǒR

DSON(PSM1)

) R

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Soft Start

SM1 and SM2 have an internal soft start circuit that limits the inrush current during start-up. An initial delay (170 µ s typ) from the converter enabled command to the converter effectively being operational is required, to assure that the internal circuits of the converter are properly biased. At the end of that initial delay the soft start is initiated, and the internal compensation capacitor is charged with a low value current source. The soft start time is typically 750 µ s, with the output voltage ramping from 5% to 95% of the final target value.

Dropout Operation at 100% Duty Cycle

The TPS65800 buck converters offer a low input to output voltage difference while still maintaining operation when the duty cycle is set to 100%. In this mode of operation the P-channel switch is constantly turned on, enabling operation with a low input voltage. Dropout operation starts if:

Where:

I(L1) = Output current plus inductor ripple current. R

= DC resistance of the inductor

Equation 7 can be also used for the SM2 converter, replacing SM1 by SM2 and L1 by L2.

Output Voltage Monitoring

The output voltage of converters SM1 and SM2 is monitored by internal comparators, and an output low voltage condition is detected when the output voltage is below 90% of the programmed value. The power good status for SM1 and SM2 is accessible via I2C, see interrupt controller section for more details.

The power good comparators for SM1 and SM2 are disabled during the transition to standby mode operation. They are enabled when the transition to standby mode is complete.

(7)

Standby Mode

Using the I2C SM1 and SM2 can be set in stand-by mode. In STANDBY mode the PFM operation mode is set and the output voltage is defined by I2C registers SM1_STANDBYand SM2_STANDBY, and it can be set to a value different than the normal mode output regulation voltage. The standby mode can also be set by the GPIO pins, if those are configured as control pins that define the SM1/SM2 operating mode.

PWM Operation

During PWM operation the converters use a fast response voltage mode controller scheme with input voltage feed-forward, enabling the use of small ceramic input and output capacitors. At the beginning of each clock cycle the P-channel MOSFET switch is turned on, and the oscillator starts the voltage ramp. The inductor current ramps up until the ramp voltage reaches the error amplifier output voltage, when the comparator trips and the p-channel MOSFET switch is turned off. Internal adaptative break-before-make circuits turn on the integrated n-channel MOSFET switch after an internal, fixed dead-time delay, and the inductor current ramps down, until the next cycle is started. When the next cycle starts the ramp voltage is reset to its low value and the p-channel MOSFET switch is turned on again.

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GATE

CONTROL

LOGIC

OSC

PGND1

VIN_SM1

3.3 Hm

OUT

(L1)

LSM1

OUTPUT VOLTAGE SETTING

PWMCONTROL SECTION (SHOWNFORSM1,SAMETOPOLOGY FORSM2)

RAMP PEAK-TO-PEAKVOLTAGE PROPORTIONAL TOVIN_SM1

ERROR AMP WITH “TYPE-3 LIKE” COMPENSATION

O(SM1)

C21 10 Fm

C22 10 Fm

SM1

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Figure 42. PWM Operation

The integrated power MOSFETs current is monitored at all times and the power MOSFET is turned off if its internal short circuit current limit is reached.

Phase Control in PWM Mode

The SM1 and SM2 converters operate synchronized to each other when both are in PWM mode, with converter SM1 as the master. I2C control register bits S1S2PHASE in register SM1_SET2 enables delaying the SM2 PWM clock with respect to SM1 PWM clock, selecting a phase shift from 0 to 270 degrees. The out-of-phase operation reduces the average current at the input node, enabling use of smaller input filter capacitors when both converters are connected to the same input supply.

PFM Mode Operation

Using the I2C interface the SM1 and SM2 converters can have the automatic power saving PFM mode enabled. When the PFM mode is set the switching frequency is reduced and the internal bias currents are decreased, optimizing the converter efficiency under light load conditions.

In PFM mode the output voltage is monitored by a voltage comparator, which regulates the output voltage to the programmed value V

. If the output voltage is below V

O(SM1)

the PFM control circuit turns on the power

O(SM1)

stage, applying a burst of pulses to increase the output voltage. When the output voltage exceeds the target regulation voltage V

, the power stage is disabled, and the output voltage drops until it is below the

O(SM1)

regulation voltage target, when the power stage is enabled again.

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GATE

CONTROL

LOGIC

PGND1

VIN_SM1

SM1

OUT

SET

RESET

OUT

OUTPUT VOLTAGE

COMPARATOR

POWERSTAGEPEAK CURRENT COMPARATORS

I(L1)

LSM1

BIASCONTROL

PFMCONTROL SECTION (SHOWNFORSM1,SAMETOPOLOGY FORSM2)

V(VIN_SM1)

39 W

V(VIN_SM1)

29 W

O(SM1)

3.3 Hm

O(SM1)

C21 10 Fm

C22 10 Fm

BURST

(OUT)

PFM(ENTER)

PFM(LEAVE)

BURST

INDUCTOR

CURRENT

OUTPUT

VOLTAGE

LOWRIPPLE

PFMOPERATION

MAXIMUMEFFICIENCY

PFMOPERATION

COMP

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Figure 43. PFM Mode Operation

During burst operation two current comparators control the power stage integrated MOSFETs. These comparators monitor the instantaneous inductor current and compare it to the internal thresholds I I

PFM(LEAVE)

inductor current exceeds I

, turning the p-channel switch on if the inductor current is less than I

PFM(ENTER)

. The n-channel switch is turned on when the p-channel MOSFET is off.

PFM(LEAVE)

and turning it off if the

The PFM output voltage comparator quiescent current may be reduced using the I2C register bits PFM_RPL1 and PFM_RPL2 in registers SM1_SET and SM2_SET. The voltage comparator quiescent current is reduced if PFM_RPL1 and PFM_RPL2 bits are set to LO, and the comparator response time (t

COMP

increases. A reduction in quiescent current increases the converter efficiency at light loads, at the expense of a larger output voltage ripple when in PFM mode.

The ripple is minimized if PFM_RPL1 and PFM_RPL2 bits are set to HI, at the expense of reduced efficiency under light loads. The operation under low and high ripple settings is described in Figure 44 .

PFM(ENTER)

, see Figure 44 )

and

When a burst of pulses is generated, the PFM current comparators control the power stage MOSFETs to limit the inductor current to a value between the thresholds I burst cycle is proportional to the load current, and the average current is always below I operation is set. The typical burst operation in PFM mode is shown in Figure 45 .

Figure 44. PFM mode operation waveforms

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and I

PFM(LEAVE)

PFM(ENTER)

. The number of pulses in a

PFM(LEAVE)

once PFM

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BURST

PFM(LEAVE)

LOADCURRENT

V(OUT)

PFM(LEAVE)

PFM(ENTER)

INDUCTORCURRENT

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Figure 45. Typical Burst Operation in PFM Mode

The PFM operation is disabled and PWM operation set if one of the following events happen during PFM operation:

1. The total burst operation time exceeds 10 µ s, typ.

2. The output voltage falls below 2% of the target regulation voltage.

The PFM mode can be disabled through the serial interface to force the individual converters to stay in fixed frequency PWM mode.

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

SWITCHED MODE STEP-DOWN CONVERTERS — I2C REGISTERS

The I2C registers that control buck converter-related functions are shown below. The HEX address for each register is shown by the register name, together with the R or W functionality for the register bits. Shaded values indicate default initial power-up values.

B7 B6 B5 B4 B3 B2 B1 B0

SM1_SET1, ADDRESS=10, ALL BITS R/W Bit name SM1 EN PFM_RPL1 PFM_SM1 SetV4_SM1 SetV3_SM1 SetV2_SM1 SetV1_SM1 SetV0_SM1 Function SM1 ON/OFF SM1 PFM SM1 PFM SM1 OUTPUT VOLTAGE REGULATION VALUE, STANDBY MODE NOT SET

When 0 OFF MAXIMIZE PWM/PFM See Table 9 for SM1, SM2 voltage setting, Power up default=1.24 V

When 1 ON MINIMIZE Only PWM

SM1_SET2, ADDRESS=11, ALL BITS R/W Bit name NOT USED STANDBY_SM DISCHSM1 S1S2PHASE_1 S1S2PHASE_0 SLEWSM1_2 SLEWSM1_1 SLEWSM1_0

Function NOT USED SM1 STANDBY SM1 output SM2 PWM CLOCK DELAY, SM1 OUTPUT SLEW RATE SETTING

When 0 NOT USED OFF OFF 00 = 0 10 = 180 000 = 0.24 010 = 0.96 100 = 5.84 110 = 15.36 When 1 NOT USED ON ON

SM1_STANDBY, ADDRESS=12, B4-B0 R/W, B7-B5 READ ONLY Bit name NOT USED NOT USED NOT USED SetV4_SM1SL SetV3_SM1SL SetV2_SM1SL SetV1_SM1SL SetV0_SM1SL Function NOT USED NOT USED NOT USED SM1 OUTPUT VOLTAGE REGULATION VALUE, STANDBY MODE SET When 0 NOT USED NOT USED NOT USED See Table 9 for SM1, SM2 voltage setting, Power up default=1.24 V When 1 NOT USED NOT USED NOT USED SM2_SET1, ADDRESS=13, ALL REGISTER BITS R/W Bit name SM2 EN PFM_RPL2 PFM_SM2 SetV4_SM2 SetV3_SM2 SetV2_SM2 SetV1_SM2 SetV0_SM2 Function SM2 ON/OFF SM2 PFM SM2 PFM SM2 OUTPUT VOLTAGE REGULATION VALUE, STANDBY MODE NOT SET

When 0 OFF MAXIMIZE PWM/PFM See Table 9 for SM1, SM2 voltage setting, Power up default=1.80 V

When 1 ON MINIMIZE ONLY PWM

SM2_SET2, ADDRESS=14, ALL REGISTER BITS R/W Bit name NOT USED STANDBY_SM DISCHSM2 NOT USED NOT USED SLEWSM2_2 SLEWSM2_1 SLEWSM2_0

Function NOT USED SM2 STANDBY SM2 output NOT USED NOT USED SM2 OUTPUT SLEW RATE SETTING

When 0 NOT USED OFF OFF NOT USED NOT USED 000 = 0.48 010 = 1.92 100 = 7.68 When 1 NOT USED ON ON NOT USED NOT USED

SM2_STANDBY, ADDRESS=15, ALL REGISTER BITS R/W Bit name NOT USED NOT USED NOT USED SetV4_SM2SL SetV3_SM2SL SetV2_SM2SL SetV1_SM2SL SetV0_SM2SL Function NOT USED NOT USED NOT USED SM1 OUTPUT VOLTAGE REGULATION VALUE, STANDBY MODE SET When 0 NOT USED NOT USED NOT USED See Table 9 for SM1, SM2 voltage setting, Power up default=1.8 V When 1 NOT USED NOT USED NOT USED

CONTROL FUNCTION MODE ON/OFF

OPERATION CTRL

EFFICIENCY

OUTPUT

RIPPLE

MODE ON discharge WITH RESPECT TO SM1 PWM

switch enable CLOCK

01 = 90 11 = 270 001 = 0.48 011 = 1.92 101 = 7.68 111 = Units: degrees Default= 180 IMMEDIATE

Unit: mV/ µ s Default= 15.36

CONTROL FUNCTION MODE ON/OFF

OPERATION CTRL

EFFICIENCY

OUTPUT

RIPPLE

MODE ON discharge

switch enable

110 = 30.72 001 = 0.096 011 = 3.84 101 = 15.36 111 = IMMEDIATE Unit: mV/ µ s Default= 30.72

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Table 9. Programmable Settings for SM1 and SM2 (Including STANDBY)

SetV4_ SetV3_ SetV2_ SetV1_ SetV0_ Vset SM1 Vset SM2 SetV4_ SetV3_ SetV2_ SetV1_ SetV0_ Vset SM1 Vset SM2

SM SM SM SM SM SM SM SM SM SM

0 0 0 0 0 0.6 1 1 0 0 0 0 1.24 2.28 0 0 0 0 1 0.64 1.08 1 0 0 0 1 1.28 2.36 0 0 0 1 0 0.68 1.16 1 0 0 1 0 1.32 2.44 0 0 0 1 1 0.72 1.24 1 0 0 1 1 1.36 2.52 0 0 1 0 0 0.76 1.32 1 0 1 0 0 1.4 2.6 0 0 1 0 1 0.8 1.4 1 0 1 0 1 1.44 2.68 0 0 1 1 0 0.84 1.48 1 0 1 1 0 1.48 2.76 0 0 1 1 1 0.88 1.56 1 0 1 1 1 1.52 2.84 0 1 0 0 0 0.92 1.64 1 1 0 0 0 1.56 2.92 0 1 0 0 1 0.96 1.72 1 1 0 0 1 1.6 3 0 1 0 1 0 1 1.8 1 1 0 1 0 1.64 3.08 0 1 0 1 1 1.04 1.88 1 1 0 1 1 1.68 3.16 0 1 1 0 0 1.08 1.96 1 1 1 0 0 1.72 3.24 0 1 1 0 1 1.12 2.04 1 1 1 0 1 1.76 3.32 0 1 1 1 0 1.16 2.12 1 1 1 1 0 1.8 3.4 0 1 1 1 1 1.2 2.2 1 1 1 1 1 0.6 1

SM1, SM2 PHASE SMX_SLEW RATE, SMX = SM1 OR SM2

S1S2_PHASE1 S1S2_PHASE0 PHASE SLEWX_2 SLEWX_1 SLEWX_0

0 0 0 ° 0 0 0 0.24 0.48 0 1 90 ° 0 0 1 0.48 0.96 1 0 180 ° 0 1 0 0.96 1.92 1 1 270 ° 0 1 1 1.92 3.84

1 0 0 3.84 7.68 1 0 1 7.68 15.36 1 1 0 15.36 30.72 1 1 1 Immediate

SM1 SM2

mV/ µ s mV/ µ s

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ANLG1

ANLG2

ADC _REF

8 CHANNEL

MUX

A/D

CONVERTER

ADC

AGND 2

OUT

A 2

SYSTEMPOWERBUS

ADC

CONTROL

LOGIC

EXTERNAL ANALOG

INPUTVOLTAGE

6INTERNAL

CHANNELS

C17

4.7 Fm

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

FUNCTIONALITY GUIDE – ANALOG TO DIGITAL CONVERTER

10 BIT SUCCESSIVE APPROXIMATION ADC

ADC Input Channels Trigger Mode Conversion Converter Mode Trigger Delay Wait Time, Multiple Power Up

Internal External Range Min Step

Charge ANLG1 and 1, 4, 8, 16, 32, Single, Average, 0-750 µ s, 50 µ s µ s: 20, 40, 60, 80, 160, ADC off

Current, ANLG2 64, 128, 256 Find max value, 16 steps 240, 320, 640

Thermistor voltages Find min value

temperature,

IC junction

temperature,

RTC_OUT

voltage, OUT

voltage,

Battery voltage

Fixed Selectable via Selectable via Selectable via Selectable via Selectable Selectable

internally

I2C I2C I2C I2C via I2C via I2C

GPIB, I2C

driven, Repeat

Count Conversions Default

ms: 1.28, 1.92, 2.56,

5.12, 10.24, 15.36, 20.48

Selectable via I2C

TPS65800

Figure 46. Required External Components, Recommended Values, External Connections

ANALOG-TO-DIGITAL CONVERTER

Overview

The TPS65800 has a 10 bit integrated successive approximation A/D, capable of running A/D conversions on eight distinct channels in a variety of modes. Two of the eight channels are connected to uncommitted pins ANLG1 and ANLG2, and can be used to convert external voltages. The other six channels monitor system parameters which are critical to the overall system monitoring. The channel selection is set via I2C.

A dedicated set of I2C registers enables configuration of the ADC to perform a conversion cycle with either a single conversion or a multiple conversions. The ALU generates a data set containing maximum value detection, minimum value detection and average value calculation for each conversion cycle. Each cycle can be performed a single time or multiple times.

Input Channels

The following channels are available for selection via the I2C register ADC_SET bits CHSEL_SET bits:

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Table 10. ADC input channel overview

Channel Connection Parameter Sampled Voltage Range Under Special Features Full Scale Reading LSB

CH1 ANLG1 pin User defined User defined Internal pullup current 2.535 V Full scale CH2 ANLG2 pin 2.535 V

CH3 ISET1 pin Voltage proportional to 0 V (charger off) to — 2.535 V

charge current 2.525 V (fast charge)

CH4 TS pin Voltage proportional to pack 0 V (short) to 4.7v (no Internal 20- µ A pullup 2.535 V

temperature thermistor) current source (ON

CH5 Internal Voltage proportional to IC 1.85 V at TJ= 25 ° C, — 2.535 V

junction junction temperature –6.5 mV/ ° C slope typ temperature

CH6 RTC_OUT Internal LDO output voltage 0 V to 3.3 V — 4.7 V

pin CH7 OUT pin System Power bus voltage 0 V to 4.4 V — 4.7 V CH8 BAT pin Battery pack positive 0 V to 4.4 V — 4.7 V

terminal voltage

FUNCTIONAL OVERVIEW

The TPS65800 ADC can be subdivided in four sections:

1. Input selection: The input selection section has two major blocks, the input bias control and an 8 channel MUX. The input bias control provides the bias currents that are applied to pins ANLG1 and ANLG2 and pin TS. The TS pin bias current is fixed (20 µ A typ), and the bias currents for pins ANLG1 and ANLG2 are set on I2C register ADC_WAIT.

The TS and ANLG1 pin current sources are automatically enabled when the input power is detected, providing the required setup to measure a pack thermistor temperature (TS pin) or a battery ID resistor (ANLG1 pin). ANLG1 and ANLG2 can be used to measure external resistive loads or analog voltages. The bias current sources are always connected to the OUT pin internally.

The internal MUX connects one of the monitored analog inputs to the ADC engine, following the selection defined on register ADC_SET.

2. ADC engine: The ADC engine uses an internal or external voltage reference, as defined by the ADC_REF bit on the ADC_SET control register. If the internal reference is selected ADC_REF is connected to an internal LDO that regulates the ADC_REF pin voltage to generate the ADC supply and internal voltage reference. The internal LDO maximum output current is 6 mA typical, and a conversion should be started only after the external capacitor is fully charged.

If an external reference is used it should be connected to the ADC_REF pin. When an external reference is selected the internal LDO connected to ADC_REF is disabled. Care must be taken when selecting an external reference as the ADC reference voltage, as it affects the ADC LSB absolute value.

3. Trigger control and synchronization: The ADC engine starts a conversion of the selected input when the trigger control circuit sends a start command. The trigger control circuit starts the ADC conversion and transfers the ADC output data to the arithmetic logic unit (ALU) at the end of the conversion. It also synchronizes the data transfer from the ALU to the I2C ADC_READING register at the end of a conversion cycle, and generates the ADC status information sent to the ADC registers.

An ADC engine conversion is triggered by the TPS65800 trigger control circuit using either an internal trigger or an external trigger. The internal trigger is automatically generated by the TPS65800 at the end of each ADC engine conversion, following the timing parameters set on I2C registers ADC_SET, ADC_DELAY and ADC_WAIT.

The GPIO3 pin can be used as an external trigger if the bit ADC_TRG_GPIO3 is set HI, in the I2C register ADC_DELAY. In the external trigger mode a new conversion is started after the GPIO3 pin has an edge transition, following the timing parameters set on I2C registers ADC_SET, ADC_DELAY and ADC_WAIT.

Normal Operating (Internal reference value

Conditions selected )

source programmable reading via I2C: 0/10/50/60 µ A ÷ 1023

only when AC/USB are present)

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8 CHANNEL

MUX

CURRENT SAMPLE

ARITHMETICLOGIC

UNIT

ANLG1

ANLG2

ISET1

RTC_OUT

OUT

BAT

10 BIT SUCCESSIVE

APROXIMATION ADC

SUPPLY REF

ACCUMULATOR

TRIGGERCONTROL

AND

SYNCHRONIZATION

START DONE

ADCREFERENCE

ANDSUPPLY

SELECTION

BIASCONTROL

ANLG 1/

ANLG 2 BIAS

SELECTION

ADCSUPPLY

AND

REFERENCE

SELECTION

OUT

ADC

CHANNEL

SELECTION

ADCCONFIGURATION :

TRIGGER, HOLDOFF, REPEAT

MODES

DELAY ANDWAIT TIMING

ALUMODE :

SINGLE,

AVERAGE ,

MIN,, MAX

TOI2C:

STATUS AND

CONVERSION

DATA

ADC_REF

I2C

TPS65800

A 2

4.7 Fm

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

4. Arithmetic Logic Unit (ALU): The ALU performs mathematical operations on the ADC output data as defined by the I2C ADC_READING registers. It executes average calculations or minimum /maximum detection. The result of the calculations is stored in a 11 bit accumulator register (1 bit allocated for carry-over). The accumulator value is transferred to the I2C data register at the end of a conversion cycle.

A simplified block diagram for the ADC is shown in Figure 47 .

TPS65800

Figure 47. ADC Simplified Block Diagram

ADC Conversion Cycle

A conversion cycle includes all the steps required to successfully sample the selected input signal and transfer the converted data to the I2C, generating an interrupt request to the host ( pin: HI → LO). The number of individual conversions (samples) in a conversion cycle is defined by the I2C ADC_SET register bits READ_MODE settings, and can range from a single sample to 256 samples. The conversion cycle settings for the ALU is defined by register ADC_READING and it can be set to average, maximum value detection, minimum value detection or no processing (ADC engine output loaded in the accumulator directly).

The conversion cycle starts with the first sampling and ends when:

• The required ALU operations are performed on the final sample, and

• The ALU accumulator data is transferred to the I2C ADC_READING register, and

• The register bit ADC_STATUS in the ADC_READING register is set to LO.

A conversion cycle is always started by the external host when the ADC_EN bit in the ADC_SET register is toggled from LO to HI by a I2C write operation. Resetting the ADC_EN bit to LO before the current conversion cycle ends ( INT: LO → HI, ADC_STATUS bit set to LO) is not recommended, as the ADC keeps its current configuration until the current conversion cycle ends.

At the end of a conversion cycle the output data is stored at registers in the ALU block. The ADC_STATUS bit is set to LO ( DONE ) and an interrupt is generated ( INT pin: HI → LO ) if the ADC_STATUS bit is unmasked, at the interrupt masking registers INT_MASK. It should be noted that the minimum, maximum and average values are ALWAYS calculated by the ALU for each conversion cycle.

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GPIO3

INTERNAL ADC

CONVERSIONSTART

CONVERTER

MODE

ARMED

CONVERTING

DLY(TRG)

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

The value loaded in the I2C registers ADC READING_HI and ADC READING_LO at the end of a conversion cycle is defined by control bits ADC_READ0 and ADC_READ1 in register ADC READING_HI. The average, minimum, maximum and last sample values for a conversion cycle can be read if the external host executes an I2C write operation, changing the values of bits ADC_READ0 and ADC_READ1, followed by an I2C read operation on registers ADC READING_HI and ADC READING_LO. The minimum, maximum, average, and last values have the same value if a conversion cycle with only one sample is executed.

The ADC_READ0 and ADC_READ1 bits can not be modified during the execution of a conversion cycle. A new conversion cycle should be started only after the current conversion cycle is completed, by toggling the ADC_EN bit from HI to LO and HI again.

External Trigger Operation

The trigger control circuit can be programmed to use an external signal to start a conversion. The TPS65800 GPIO3 input is configurable as an ADC trigger, with ADC conversion starting on either a rising edge or falling edge. When using an external trigger the trigger delay, trigger wait time delay and trigger holdoff mode can be programmed using I2C registers.

The procedure to start an externally-triggered conversion cycle has the following steps:

1. Verify that the current conversion cycle has ended (ADC_STATUS=LO, I2C register ADC_READING_HI)

2. Set ADC_EN=LO

3. Configure ADC sampling mode, ALU mode, trigger parameters, etc.

4. Set ADC_EN=HI

After step 4 the ADC is armed, waiting for an external trigger detection to start a conversion cycle. Similarly to the non-triggered mode, the ADC configuration should not be modified until the current conversion cycle ends. Note that in the external trigger mode the current cycle does not end if the converter is armed and an external trigger is not detected.

Detecting an External Trigger Event

An external trigger event is detected when the GPIO3 input has an edge that matches the edge detection programmed in the EDGE bit, at the I2C register ADC_DELAY. The internal ADC trigger can be delayed with respect to the external trigger signal edge. The delay time value is set by the ADC_DELAY register bits DELAY_n, and can range from 0 µ s (no delay) to 750 µ s. A conversion is started only if the external trigger remains at its active level when the delay time expires, as shown in Figure 48 . In a positive-edge detection the active trigger level is HI; in a negative-edge detection the active trigger level is LO.

Figure 48. ADC Conversion Triggerd by GPIO3 Positive Edge-Triggered Active-Level HI

Executing Multiple-Sample Cycles With an External Trigger

When executing conversion cycles that require multiple samples it may be desirable to synchronize the input signal conversion using either an external trigger that has a periodic repetition rate or an external asynchronous trigger that indicates when the external input signal being converted is valid. The TPS65800 has additional operating modes and timing parameters that can be programmed using the I2C to configure multiple sample conversion cycles.

In multiple sample cycles the host can select the wait time between samples using the bits WAITn in the ADC_WAIT register to set the wait time between samples. The wait time is measured between the end of a conversion and the start of a new conversion.

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GPIO3

INTERNAL ADC

CONVERSIONSTATUS

FIRST

SAMPLE

LAST

SAMPLE

OFF

WAIT(TRG)

DLY(TRG

)

CONVERSIONCYCLE

GPIO3

INTERNAL ADC

CONVERSIONSTATUS

FIRST

SAMPLE

LAST

SAMPLE

OFF

WAIT(TRG)

DLY(TRG)

CONVERSIONCYCLE

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

With the default power-up settings (HOLDOFF=LO, ADC_DELAY register), the TPS65800 executes a multiple-sample conversion cycle if the first sample is taken when the trigger is at its active level. Subsequent samples are converted at the end of the wait time, even if the trigger returns to the non-active level. The external trigger level edge is ignored until the current conversion cycle ends.

Figure 49. ADC Conversion Triggerd by GPIO3 Positive Edge-Triggered Active-Level Hi, Holdoff = LC

If the sample conversion needs to be synchronized with an external trigger, during multiple sample conversion cycles, the control bit HOLDOFF should be set to HI. When the holdoff mode is active, the internal trigger starts a sample conversion only if the external trigger was detected and is at its active level at the end of the wait time, as shown in Figure 50 .

When the multiple sample cycles are executed the host must configure the maximum and minimum limits for the ADC output using registers DLOLIM1, DLOLIM2, DHILIM1 and DHILIM2. A conversion cycle ends if any individual conversion result exceeds the maximum limit value or is below the minimum limit value. When an out of limit conversion is detected an interrupt is sent to the host, and the ADC_STATUS bit on register ADC READING_HI is set to DONE.

Continuous Conversion Operation (Repeat Mode)

The TPS65800 ADC can be set to operate in a continuous conversion mode, with back-to-back conversion cycles executed. The REPEAT mode is targeted at applications where an input is continuously monitored for a period of time, and the host must be informed if the monitored input is out of the range set by I2C registers DLOLIM1, DLOLIM2, DHILIM1 and DHILIM2. In REPEAT mode each conversion is started when the ADC trigger (internal or external) is detected, and a new conversion cycle is started when the current conversion cycle ends. All the trigger and sampling modes available for normal conversion cycles are available in repeat mode. Executing I2C read operations to get the ADC readings for average, minimum, maximum and last sample values is possible in REPEAT mode. However, this is not a recommended operation, as the REPEAT mode does not generate a DONE status flag making it difficult to synchronize the ADC data reading to the end of a conversion cycle.

The recommended use of the REPEAT mode is:

Figure 50. ADC Conversion Triggered by GPIO3 Positive Edge-Triggered Active-Level HI;

Holdoff = HI, Four Sample Cycles

1. Configure the ADC conversion cycle: trigger mode, sample mode, select input signal, etc.

2. Configure the HI and LO limits for the ADC readings

3. Set the ADC_DELAY register bit REPEAT to HI

4. Toggle ADC_DELAY register bit ADC_EN bit from LO to HI

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

5. Monitor the INT pin. An interrupt triggered by ADC_STATUS=LO indicates that the selected input signal is out of range

To exit the continuous mode the host must follow the steps below, if external trigger mode was set:

1. Exit external trigger mode

2. Set REPEAT bit to LO, effectively terminating the repeat mode. This generates an additional conversion; at the end of this conversion the ADC is ready for a new configuration.

3. Set ADC_EN to LO, after on-going conversion ends To exit the continuous mode the host must follow the steps below, if internal trigger mode was set:

1. Set REPEAT bit to LO, effectively terminating the repeat mode.

2. Set ADC_EN to LO, after on-going conversion ends

ADC Input Signal Range Setting

The registers DHILIMn and DLOLIMn can be used by the host to set maximum and minimum limits for the DAC engine output. At the end of each conversion the ADC output is checked for the maximum and minimum limits, and a status flag is set if the converted data exceeds the high limit or is under the low limit. In multiple sample operation the converted data range is checked when all programmed samples have been converted.

The host can mask or unmask interrupts caused by the ADC range status bits using the INT_MASKn registers.

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LOAD ADC

CONFIGURATION

DATA FROMI2C

TRIGGERMODE, TRIGGERDELAY

SAMPLEWAIT TIME,

HOLDOFFMODE REPEAT ON/OFF

ALUMODE : AVG/MAX/MIN

NUMBEROFSAMPLES

ADCINPUT RANGE

ADCCHANNEL

ADC

ENABLED

(I2C) ?

TRIGGER

EDGE

DETECT

EXTERNAL

TRIGGER

HOLDOFF

1) SET ADC BUSY STATUS

2) START CONVERSION

TRIGGER

EDGE MODE

TRIGGER

CONVERSIONS

CONVERSION

DONE

WAIT TIME

0 µsto 20.5 msec

STARTTRIGGER

DELAY

1) LOADDATA IN ALU

2) ALUOUTPUT

STOREDIN

ACCUMULATOR

ALU

DATAOUT OF

RANGE

REPEAT

MODE

) LOADI2CDATA

2) SET ADCSTATUS TODONE

3) INT SENT TOHOST IFNON-MASKED

1) SET ADC_HIOR ADC_ LOFAULT

2) SET ADCSTATUS TODONE

3) INT SENT TOHOST IFNON-MASKED

CURRENT

CYCLEENDS

HOSTSTARTSNEW

CONVERSION

CYCLEBY SETTING

ADC_EN=HI

YES

YES,CHECK

TRIGGER

NO,SEND

DATA

TOI2C

YESFAULT DETECTED

YES

FALLING

EDGE

RISING

EDGE

ADCCONVERSION

COMPLETE

ALUOUTPUT DATAREADY

YES

TRIGGER

VALID

TRIGGER

DELAY OVER

NO,OPPOSITE

TRIGGEREDGE

HAPPENED

BEFOREDELAY

TIME

YES

ADC

ENABLED

(I2C) ?

YES

NO,SEND

DATA

TOI2C

ADC

ENABLED

(I2C) ?

NO, HOSTENDS

CURRENT

CONVERSION

CYCLESETTING

ADC_EN=LO

YES,CURRENT

CONVERSION CYCLESTILL

ACTIVE,

ADC_EN= HI

TPS

65800READY FORNEW

CONVERSION

CYCLE

I2CWRITEOPERATION

CONFIGURESNEXT

CONVERSIONCYCLE

ADC_EN=LO

NO,

ADC+EN=LO,

NEEDTO

RECONFIGURE

ADC

PARAMETERS

ALU

RESET

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ADC State Machine

The ADC state machine with all the trigger and operation modes is shown in Figure 51 .

TPS65800

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BATTERY DETECTION CIRCUIT

The ANLG1 pin has an internal current source connected between OUT and ANLG1, which is turned on automatically when the OUT pin voltage exceeds the minimum system voltage set by the SYS_IN pin external resistive divider. The current levels for ANLG1 pin can be programmed via I2C register ADC_WAIT, bits BATID_n. An integrated switch discharges the BAT pin to AGND1 when V(ANLG1)> V(OUT) – V enabling implementation of a battery removal function if an external pack resistor ID is connected between ANLG1 and ground.

The ANLG1 pin may be used to monitor other parameters than a pack ID resistor. When ANLG1 pin is used as a generic ADC analog input V(ANLG1) should never exceed V(OUT) – V discharge caused by activation of the battery pin discharge circuit.

Figure 51. Trigger and Operation Modes for the ADC State Machine

(NOBATID)

, to avoid undesired battery

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

ADC – I2C REGISTERS

The I2C registers that control ADC-related functions are shown below. The HEX address for each register is shown by the register name, together with the R or W functionality for the register bits. Default, initial power-up values are shown in bold. In the timing equations, replace Bn with 1 for HI state, and 0 for LO state.

B7 B6 B5 B4 B3 B2 B1 B0

ADC_SET, ADDRESS = 1E, ALL BITS R/W Bit Name ADC_ENABLE ADC_REF_EN CHSEL2_SET CHSEL1_SET CHSEL0_SET READ_MODE2 READ_MODE1 READ_MODE0 Function ADC ON/OFF ADC ADC CHANNEL SELECTION ADC SAMPLING SETTINGS

When 0 OFF Internal 000 = ANLG1 011 = V(TS) 110 = V(OUT) 000 = 1 011 = 16 110 = 128 When 1 ON External

ADC READING_HI, ADDRESS = 1F, BITS B3/B4 R/W, ALL OTHER BITS READ ONLY Bit Name ADC_STATUS NOT USED NOT USED ADC_READ1 ADC_READ0 D10 D9_MSB D8 Function CURRENT NOT USED NOT USED ALU OUTPUT DATA ADC ADC CONVERSION OUTPUT

When 0 DONE NOT USED NOT USED 00=LAST 10 = MAXIMUM VALID ONLY AFTER ADC When 1 BUSY NOT USED NOT USED

ADC READING_LO, ADDRESS = 20, READ ONLY Bit Name D7 D6 D5 D4 D3 D2 D1 D0_LSB Function ADC CONVERSION OUTPUT BITS, VALID ONLY AFTER ADC CONVERSION ENDS Value VALUE=[B10*512 + B9*256 + B8*128 + B7*64 + B6*32 + B5*16 + B4*8 + B3*4 + B2*2 + B1] * [ VRNG(CHn) / 1023]; Unit=Volts,

DHILIM1, ADDRESS = 21, ALL BITS R/W Bit Name NOT USED NOT USED NOT USED NOT USED NOT USED DHILIM10 DHILIM9 DHILIM8 Function RESERVED ADC MAX INPUT LIMIT RANGE SETTING (3

DHILIM2, ADDRESS = 22, ALL BITS R/W Bit Name DHILIM7 DHILIM6 DHILIM5 DHILIM4 DHILIM3 DHILIM2 DHILIM1 DHILIM0_LSB Function ADC MAX INPUT LIMIT RANGE SETTING (8 LSBs) DLOLIM1, ADDRESS = 23, ALL BITS R/W Bit Name NOT USED NOT USED NOT USED NOT USED NOT USED DLOLIM10 DLOLIM9 DLOLIM8 Function RESERVED ADC MIN INPUT LIMIT RANGE SETTING (3 MSBs) DLOLIM2, ADDRESS = 24, ALL BITS R/W Bit Name DLOLIM7 DLOLIM6 DLOLIM5 DLOLIM4 DLOLIM3 DLOLIM2 DLOLIM1 DLOLIM0_LSB Function ADC MIN INPUT LIMIT RANGE SETTING (8 LSBs) ADC_DELAY, ADDRESS = 25,ALL BITS R/W Bit Name ADC_TRG_GPIO3 EDGE _GPIO3 HOLDOFF REPEAT Delay_3 Delay_2 Delay_1 Delay_0 Function USE GPIO3 AS GPIO3 ADC REPEAT ADC EXTERNAL TRIGGER DELAY SETTING

When 0 OFF Falling Edge OFF OFF t When 1 ON Rising Edge ON ON ADC_WAIT, ADDRESS = 26, ALL BITS R/W Bit Name ADC_cH2I_D1 ADC_cH2I_D0 BATIDI_D1 BATIDI_D0 WAIT_D3 WAIT_D2 WAIT_D1 WAIT_LSB Function ANLG2 PULLUP CURRENT ANLG1 PULLUP CURRENT ADC SAMPLE WAIT TIME, MULTIPLE SAMPLES MODE

When 0 11:60 µ A, 10:50 µ A, 01:10 µ A, 00: 0 11:60 µ A, 10:50 µ A, 01:10 µ A, 0000 = 0 0100 = 0.08 1000 = 0.64 1100 = 5.12 When 1

CONTROL REFERENCE

CONVERSION SELECTION AVERAGE BITS

STATUS CARRYOVER

ADC TRIGGER TRIGGER HOLDOFF MODE

SOURCE VALUE SOURCE VALUE

Default= 00 00: WEAK PULLUP 0001 = 0.02 0101 = 0.16 1001 = 1.28 1101 = 10.24

SELECTION

001 = ANLG2 100 = Tj 111 = V(BAT) 001 = 4 100 = 32 111 = 256 010 = V(ISET1) 101 = Default = 010 = 8 101 = 64 Default = 1

The LSB bit value is proportional to the ADC reference voltage - See V

MODE ON/OFF ON/OFF

CONTROL

V(RTC_OUT) ANLG1

01=AVERAGE 11 = MINIMUM CONVERSION ENDS SEE Default= LAST ADC_READING_LO

= B4*400 + B3 * 200 + B2*100 + B1* 50, Units= µ s Default=0

DLY(TRIG)

Default: 00 0010 = 0.04 0110 = 0.24 1010 = 1.92 1110 = 15.36

0011 = 0.06 0111 = 0.32 1011 = 2.56 1111 = 20.48 Units = ms Default = 0

BIT

in electrical parameters

RNG(CHn)

MSBs)

µ s

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SM3

PGND3

4.7 Hm

PWM

LED_PWM

RED

BLUE

GREEN

AGND0

PWM

DRIVER

RGB

DRIVER

WHITELED

DRIVER

DISPLAY ANDI/O

SM3_SW

OUT

TPS65800

WHITELEDS

LSM3

EXTERNAL

PERIPHERALS

RGBLED

FB3

C27 1 Fm

C18 100pF

FB3

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

FUNCTIONALITY GUIDE — LED AND PERIPHERAL DRIVERS

WHITE LED CONSTANT CURRENT DRIVER

Driver PWM Output LED Current Eff (%) Power Up

Duty Cycle # of Steps Io(Typ) Max Acc (%)

Range

SM3 Off (0%), 256 5 V–25 V Set by external resistor 25 mA 25 80 Off (0%)

0.4% -99.6% Set via I2C

OPEN DRAIN PWM DRIVERS

Driver PWM Freq (kHz) PWM Duty Cycle Io(max) Power Up Default

PWM 0.5/1/1.5/2/3/ 4.5/7.8/15.6 Off (0%), 8 6.25% 150 Off(0%)

Set via I2C 6.25% to 100

LED_PWM 15.625 or 23.4 , set via I2C Off(0%), 256 0.4% 150 Off (0%)

RGB OPEN DRAIN LED DRIVER

Driver Flash Period (same for RGB) Flash On time (same for RGB) Brightness Io mA Power Up

Range # of Min Step Range # of Min Step Duty (%) # of Min

Steps Steps Steps Steps

RED, No flash, 16 0.5 s 0.1–0.6 s 8 0.1 s Off (0%), 32 3.125% 0/4/8/12 Flash Off, 0 GREEN, or 1–8 s Set via I2C 3.125 to mA, BLUE Set via I2C 96.87 0%

Voltage Default

Range # of Steps Min Step

Set via I2C

0.4% to 99.6% Set via I2C

(Individual R/G/B Control) Default

Set via I2C brightness

duty cycle

Figure 52. Required External Components, Recommended Values, External Connections

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3.3 Hm

SM3

PGND3

FB3

OUT

GATE

DRIVE

GATE

DRIVE

500 mA

INDUCTORPEAK

CURRENT

DETECTION

LEDLOWCURRENT

DETECTION

OUTPUT OVP

DETECTION

CONTROL LOGIC AND

MINIMUMOFF TIME

MAXIMUMON TIME

SOFT

START

DUTY CYCLE

CONTROL

OFF

OFFON EN

LEDSWITCH FREQUENCY

ANDDUTY

CYCLE

TPS65800

250 mV

I2CREGISTER

28V

LED

SWITCH

POWER

STAGE

SWITCH

LSM3

SM3_SW

FB3

C27

1 Fm

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

WHITE LED CONSTANT CURRENT DRIVER

The TPS65800 has an integrated boost converter (SM3) that is optimized to drive white LEDs connected in a series configuration. Up to six series white LEDs can be driven, with programmable current and duty cycle adjustable via a dedicated I2C register.

The SM3 boost converter (SM3) has a 30-V, 500-mA, low-side integrated power stage switch that drives the external inductor. Another integrated 30-V, 25-mA switch (LED switch) is used to modulate the brightness of the external white LEDs. A simplified block diagram is shown in Figure 53

Figure 53. Simplified Block Diagram

The SM3 converter operates like a standard boost converter. The LED current is defined by the value of the external resistor R

, connected from pin FB3 to AGND1. The integrated power stage switch control monitors

FB3

the LED switch current (FB3) and the integrated power stage switch current, implementing a topology that effectively regulates the LED current independently of the input voltage and number of LEDs connected. The high voltage rating of the integrated switches enables driving up to six white LEDs, connected in a series configuration.

The internal LED switch, in series with the external LEDs, disconnects the LEDs from ground during shutdown. In addition, the LED switch is driven by a PWM signal that sets the duty cycle, enabling adjustment to the average LED current by modifying the settings of the I2C register SM3_SET. With this control method, the LED brightness depends on the LED switch duty cycle only, and is independent of the PWM control signal.

The duty cycle control used in the SM3 converter LED switch is implemented by generating a burst of high frequency pulses, with a pattern that is repeated periodically. For a duty cycle of 50%, all of the high frequency pulses have a 50% duty cycle. The duty cycle control sets individual pulses to 100% duty cycle when increasing the LED_PWM output duty cycle; for decreasing LED_PWM output duty cycles, individual pulses are set to 0% duty cycle. An example of distinct duty cycles is shown in Figure 54 , the sum of the individual pulses on/off time over the repetition period are equivalent to the duty cycle obtained with traditional single-pulse duty cycle circuits.

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SM3CONVERTER

>50%DUTY CYCLE

REPETITIONPERIOD

SM3CONVERTER 50%DUTY CYCLE

SM3CONVERTER

<50%DUTY CYCLE

P(typ)

+ I

MAX(L3)

)

V(OUT)

100 ns, or : I

P(typ)

+ 500 mA )

V(OUT)

100 ns

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Figure 54. Example of Distinct Duty Cycles

The repetition period can be set using the register SOFT_RESET control bit SM3_LF_OSC to either 180 Hz (HI) or 122 Hz (LO). Each repetition period has a total of 256 pulses, enabling a resolution of 0.4% when programming the duty cycle.

SM3 Control Logic Overview

The SM3 boost converter operates in a pulse frequency modulation (PFM) scheme with constant peak current control. This control scheme maintains high efficiency over the entire load current range and enables the use of small external components, as the switching frequency can reach up to 1 MHz depending on the load conditions. The LED current ripple is defined by the external inductor size.

The converter monitors the sense voltage at pin FB3, and turns on the integrated power stage switch when V

is below the 250-mV (typ) internal reference voltage and the LED Switch is ON, starting a new cycle. The

(FB3)

integrated power switch turns off when the inductor current reaches the internal 500-mA (typ) peak current limit, or if the switch is on for a period longer than the maximum on-time of 6 µ s (typ). The integrated power switch also turns off when the LED switch is set to OFF. As the integrated power switch is turned off, the external Schottky diode is forward biased, delivering the stored inductor energy to the output. The main switch remains off until the FB3 pin voltage is below the internal 250-mV reference voltage and the LED switch is turned ON, when it is turned on again.

This PFM peak current control scheme sets the converter in discontinuous conduction mode (DCM), and the switching frequency depends on the inductor, input/output voltage and LED current. Lower LED currents reduce the switching frequency, with high efficiency over the entire LED current range. This regulation scheme is inherently stable, allowing a wide range for the selection of the inductor and output capacitor.

Peak Current Control (Boost Converter)

The SM3 integrated power stage switch is turned on until the inductor current reaches the DC current limit I

MAX(L3)

(500 mA, typ). Due to internal delays, typically around 100 ns, the actual current exceeds the DC current

limit threshold by a small amount. The typical peak current limit can be calculated as shown in Equation 8

The current overshoot is directly proportional to the input voltage, and inversely proportional to the inductor value.

Soft Start

All inductive step-up converters exhibit high in-rush current during start-up. If no special precautions are taken, voltage drops can be observed at the input supply rail during start-up, with unpredictable results in the overall system operation.

The SM3 boost converter limits the inrush current during start-up by increasing the current limit in three steps:

1. 125 mA (typ),

2. 250 mA (typ) and

3. 500 mA (typ)

The two initial steps (125 mA and 250 mA) are active for 256 power stage switching cycles.

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LED_PWM,>50%DUTY CYCLE

LED_PWM,50%DUTY CYCLE

LED_PWM,<50%DUTY CYCLE

REPETITIONPERIOD

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Enabling the SM3 Converter

The SM3_SET I2C register controls the SM3 LED switch duty cycle. If the register is set to all zeros SM3 is set to OFF mode. When the host writes a value other than 00 in SM3_SET the SM3 converter is enabled, entering the soft start phase and then normal operation. The SM3 converter can operate with duty cycles varying from

0.4% to 99.6%, with LED switch frequencies of 122 Hz or 180 Hz. The LED switch operating frequency is set by bit SM3_LF, in the SOFT_RESET register.

Overvoltage Protection

The output voltage of the boost converter is sensed at pin SM3, and the integrated power stage switch is turned OFF when V(SM3) exceeds the internal overvoltage threshold V when V(SM3) < V

– V

OVP3

HYS(OVP3)

Under Voltage Lockout Operation

When the TPS65800 enters the UVLO mode, the SM3 converter is set to OFF mode with the power stage MOSFET switch and the LED switch open (off).

Thermal Shutdown Operation

When the TPS65800 enters the thermal shutdown mode, the SM3 converter is set to OFF mode with the power stage MOSFET switch and the LED switch open (off).

PWM DRIVERS

. The converter returns to normal operation

OVP3

PWM Pin Driver

The TPS65800 offers one low-frequency, open-drain PWM driver, capable of driving up to 150 mA. The PWM frequency and duty cycle are defined by the PWM I2C register settings. The PWM parameters are set in I2C register PWM. Available frequency values range from 500 Hz to 15 kHz, with 8 frequency values and 16 duty cycle options (6.25% each).

LED_PWM Pin Driver

The TPS65800 has another PWM driver output (pin LED_PWM), which is optimized to drive a backlight LED. The LED_PWM driver controls the external LED current intensity using a pulse-width control method, with duty cycle being set by the I2C register LED_PWM.

The pulse width method implemented generates a burst of high frequency pulses, with a pattern that is repeated periodically. For a duty cycle of 50%, all of the high -frequency pulses have a 50% duty cycle. The duty cycle control sets individual pulses to 100% duty cycle when increasing the LED_PWM output duty cycle; for decreasing LED_PWM output duty cycles individual pulses are set to 0% duty cycle. An example of distinct duty cycles is shown in Figure 55 ; the sum of the individual pulses on/off time over the repetition period is equivalent to the duty cycle obtained with traditional single-pulse duty cycle circuits.

The repetition period can be set using the register SOFT_RESET control bit SM3_LF_OSC to either 183 Hz (HI) or 122 Hz (LO). Each repetition period has a total of 256 pulses, enabling a resoltuion of 0.4% when programming the duty cycle. The LED_SET register enables control of the duty cycle via I2C, with duty cycle ranging from 0.4% to 99.6%. Setting the LED_SET register to all zeros forces the LED_PWM pin to 0% duty cycle (OFF).

Figure 55. Example of Distinct Duty Cycles

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GREEN

LEDB

RED

BLUE

FLASH

CONTROL

LED

CURRENT

SETTINGS

RGB DUTY

CYCLE

CONTROL

LED

CONTROL

LOGIC

OUT

RED

GRN

BLUE

LEDR

LEDG

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

RGB Driver

The TPS65800 has a dedicated driver for an RGB external LED. Three outputs are available (pins RED, GREEN, BLUE), with common settings for operation mode (flash on/off, flash period, flash on time), LED current and phase delay between outputs. The TPS65800 RGB driver continually flashes the external LEDs connected to the RED, GREEN and BLUE pins using the flash operation parameters defined in register RGB_FLASH.

The currents for the external LEDs can be programmed via I2C, and external resistors are not required to limit the LED current. However, they can be added to set the LED current if the available I2C values are not compatible with the current application, as shown in the circuit below:

Figure 56. Limiting the External LED Current

The flashing-mode parameters defined in register RGB_FLASH enable setting the flashing period from 1 to 8 seconds in 0.5-s steps, or to continuous operation. Flashing operation is enabled by setting the FLASH_EN bit in register RGB_FLASH to HI. This bit must be set HI to enable the RGB current-sink channels.

Each driver has an individual duty cycle control. The duty cycle modulation method used is similar to the PWM_LED duty cycle control, with high frequency pulses being generated when the driver (RED, GREEN, or BLUE pins) is ON. The repetition period for the RGB drivers has a total of 32 pulses, enabling a 3.125% resolution when programming the individual RED, GREEN and BLUE drivers duty cycles. The duty cycles for each driver can be set individually using control bits on registers RGB_RED, RGB_GREEN and RGB_BLUE.

The RGB drivers can be programmed to sink 4, 8, or 12 mA, with no external current limiting resistor.

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

White LED, PWM Drivers — I2C Registers

The I2C registers that control LED AND PWM driver related functions are shown below. The HEX address for each register is shown by the register name, together with the R or W functionality for the register bits. Shaded values indicate default initial power-up values. In the equations replace Bn with 1 for HI state, and 0 for LO state.

B7 B6 B5 B4 B3 B2 B1 B0

SM3_SET, ADDRESS=16, ALL BITS R/W Bit Name SM3_I7 set SM3_I6 set SM3_I5 set SM3_I4 set SM3_I3 set SM3_I2 set SM3_I1 set SM3_I0 set Function SM3 DUTY CYCLE CONTROL Value See Table 11 for SM3 duty cycle settings, default = 0 (OFF) RGB_FLASH, ADDRESS= 17, ALL BITS R/W Bit Name FLASH_EN FLASH_ON2 FLASH_ON1 FLASH_ON0 FLASH_PER3 FLASH_PER2 FLASH_PER1 FLASH_PER0 Function FLASH MODE FLASH MODE ON TIME FLASH MODE PERIOD

When 0 OFF See Table 12 for RGB ON TIME settings, See Table 12 for RGB FLASH settings, default = 1 When 1 ON RGB_RED, ADDRESS=18, ALL BITS R/W Bit Name RGB_ISET1 RGB_ISET0 PHASE PWMR_D4 PWMR_D3 PWMR_D2 PWMR_D1 PWMR_D0 Function RGB LED CURRENT SETTINGS PHASE REG DRIVER DUTY CYCLE CONTROL

When 0 00= 0 10= 8 mA GREEN out of See Table 12 for RGB_RED DUTY settings, default = 0

When 1 BLUE out of Φ

RGB_GREEN, ADDRESS=19, ALL BITS R/W Bit Name NOT USED NOT USED NOT USED PWMG_D4 PWMG_D3 PWMG_D2 PWMG_D1 PWMG_D0 Function NOT USED NOT USED NOT USED GREEN DRIVER DUTY CYCLE CONTROL Value NOT USED NOT USED NOT USED See Table 12 for RGB_GREEN DUTY settings, default = 0 RGB_BLUE, ADDRESS=1A, ALL BITS R/W Bit Name NOT USED NOT USED NOT USED PWMB_D4 PWMB_D3 PWMB_D2 PWMB_D1 PWMB_D0 Function NOT USED NOT USED NOT USED BLUE DRIVER DUTY CYCLE CONTROL Value NOT USED NOT USED NOT USED See Table 12 for RGB_BLUE DUTY settings, default = 0 PWM, ADDRESS=1D, ALL BITS R/W Bit Name PWM_EN PWM1_F2 PWM_F1 PWM_F0 PWM_D3 PWM_D2 PWM_D1 PWM_D0 Function PWM ON/OFF PWM DRIVER FREQUENCY SETTINGS PWM DRIVER DUTY CYCLE SETTINGS

When 0 Disabled 000 = 15.6 kHz 011 = 3 kHz 110 = 1 kHz See Table 13 for PWM DUTY settings, default = 0.0625 When 1 Enabled

LED_PWM, ADDRESS=27, ALL BITS R/W Bit Name LPWM_7 set LPWM_6 set LPWM_5 set LPWM_4 set LPWM_3 set LPWM_2 set LPWM_1 set LPWM_0 set Function LED_PWM DRIVER DUTY CYCLE CONTROL Value See Table 11 for LED_PWM DUTY settings, default=0 (OFF)

ON/OFF CTRL

default=0.1

CONTROL

01= 4 mA 11=12 mA Φ with RED &

BLUE

with RED &

GREEN

CONTROL

001 = 7.8 kHz 100 = 2 kHz 111 = 500 Hz 010 = 4.5 101 = 1.5 kHz Default = 15.6 kHz kHz

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Table 11. SM3 Duty Cycle Settings

Dec B7–B0 Dcpu Dec B7–B0 Dcpu Dec B7–B0 Dcpu Dec B7–B0 Dcpu Dec B7–B0 Dcpu

0 0000 0000 – 52 0011 0100 0.203 104 0110 1000 0.406 156 1001 1100 0.609 208 1101 0000 0.813 1 0000 0001 0.004 53 0011 0101 0.207 105 0110 1001 0.410 157 1001 1101 0.613 209 1101 0001 0.816 2 0000 0010 0.008 54 0011 0110 0.211 106 0110 1010 0.414 158 1001 1110 0.617 210 1101 0010 0.820 3 0000 0011 0.012 55 0011 0111 0.215 107 0110 1011 0.418 159 1001 1111 0.621 211 1101 0011 0.824 4 0000 0100 0.016 56 0011 1000 0.219 108 0110 1100 0.422 160 1010 0000 0.625 212 1101 0100 0.828 5 0000 0101 0.020 57 0011 1001 0.223 109 0110 1101 0.426 161 1010 0001 0.629 213 1101 0101 0.832 6 0000 0110 0.023 58 0011 1010 0.227 110 0110 1110 0.430 162 1010 0010 0.633 214 1101 0110 0.836 7 0000 0111 0.027 59 0011 1011 0.230 111 0110 1111 0.434 163 1010 0011 0.637 215 1101 0111 0.840 8 0000 1000 0.031 60 0011 1100 0.234 112 0111 0000 0.438 164 1010 0100 0.641 216 1101 1000 0.844

9 0000 1001 0.035 61 0011 1101 0.238 113 0111 0001 0.441 165 1010 0101 0.645 217 1101 1001 0.848 10 0000 1010 0.039 62 0011 1110 0.242 114 0111 0010 0.445 166 1010 0110 0.648 218 1101 1010 0.852 11 0000 1011 0.043 63 0011 1111 0.246 115 0111 0011 0.449 167 1010 0111 0.652 219 1101 1011 0.855 12 0000 1100 0.047 64 0100 0000 0.250 116 0111 0100 0.453 168 1010 1000 0.656 220 1101 1100 0.859 13 0000 1101 0.051 65 0100 0001 0.254 117 0111 0101 0.457 169 1010 1001 0.660 221 1101 1101 0.863 14 0000 1110 0.055 66 0100 0010 0.258 118 0111 0110 0.461 170 1010 1010 0.664 222 1101 1110 0.867 15 0000 1111 0.059 67 0100 0011 0.262 119 0111 0111 0.465 171 1010 1011 0.668 223 1101 1111 0.871 16 0001 0000 0.063 68 0100 0100 0.266 120 0111 1000 0.469 172 1010 1100 0.672 224 1110 0000 0.875 17 0001 0001 0.066 69 0100 0101 0.270 121 0111 1001 0.473 173 1010 1101 0.676 225 1110 0001 0.879 18 0001 0010 0.070 70 0100 0110 0.273 122 0111 1010 0.477 174 1010 1110 0.680 226 1110 0010 0.883 19 0001 0011 0.074 71 0100 0111 0.277 123 0111 1011 0.480 175 1010 1111 0.684 227 1110 0011 0.887 20 0001 0100 0.078 72 0100 1000 0.281 124 0111 1100 0.484 176 1011 0000 0.688 228 1110 0100 0.891 21 0001 0101 0.082 73 0100 1001 0.285 125 0111 1101 0.488 177 1011 0001 0.691 229 1110 0101 0.895 22 0001 0110 0.086 74 0100 1010 0.289 126 0111 1110 0.492 178 1011 0010 0.695 230 1110 0110 0.898 23 0001 0111 0.090 75 0100 1011 0.293 127 0111 1111 0.496 179 1011 0011 0.699 231 1110 0111 0.902 24 0001 1000 0.094 76 0100 1100 0.297 128 1000 0000 0.500 180 1011 0100 0.703 232 1110 1000 0.906 25 0001 1001 0.098 77 0100 1101 0.301 129 1000 0001 0.504 181 1011 0101 0.707 233 1110 1001 0.910 26 0001 1010 0.102 78 0100 1110 0.305 130 1000 0010 0.508 182 1011 0110 0.711 234 1110 1010 0.914 27 0001 1011 0.105 79 0100 1111 0.309 131 1000 0011 0.512 183 1011 0111 0.715 235 1110 1011 0.918 28 0001 1100 0.109 80 0101 0000 0.313 132 1000 0100 0.516 184 1011 1000 0.719 236 1110 1100 0.922 29 0001 1101 0.113 81 0101 0001 0.316 133 1000 0101 0.520 185 1011 1001 0.723 237 1110 1101 0.926 30 0001 1110 0.117 82 0101 0010 0.320 134 1000 0110 0.523 186 1011 1010 0.727 238 1110 1110 0.930 31 0001 1111 0.121 83 0101 0011 0.324 135 1000 0111 0.527 187 1011 1011 0.730 239 1110 1111 0.934 32 0010 0000 0.125 84 0101 0100 0.328 136 1000 1000 0.531 188 1011 1100 0.734 240 1111 0000 0.938 33 0010 0001 0.129 85 0101 0101 0.332 137 1000 1001 0.535 189 1011 1101 0.738 241 1111 0001 0.941 34 0010 0010 0.133 86 0101 0110 0.336 138 1000 1010 0.539 190 1011 1110 0.742 242 1111 0010 0.945 35 0010 0011 0.137 87 0101 0111 0.340 139 1000 1011 0.543 191 1011 1111 0.746 243 1111 0011 0.949 36 0010 0100 0.141 88 0101 1000 0.344 140 1000 1100 0.547 192 1100 0000 0.750 244 1111 0100 0.953 37 0010 0101 0.145 89 0101 1001 0.348 141 1000 1101 0.551 193 1100 0001 0.754 245 1111 0101 0.957 38 0010 0110 0.148 90 0101 1010 0.352 142 1000 1110 0.555 194 1100 0010 0.758 246 1111 0110 0.961 39 0010 0111 0.152 91 0101 1011 0.355 143 1000 1111 0.559 195 1100 0011 0.762 247 1111 0111 0.965 40 0010 1000 0.156 92 0101 1100 0.359 144 1001 0000 0.563 196 1100 0100 0.766 248 1111 1000 0.969 41 0010 1001 0.160 93 0101 1101 0.363 145 1001 0001 0.566 197 1100 0101 0.770 249 1111 1001 0.973 42 0010 1010 0.164 94 0101 1110 0.367 146 1001 0010 0.570 198 1100 0110 0.773 250 1111 1010 0.977 43 0010 1011 0.168 95 0101 1111 0.371 147 1001 0011 0.574 199 1100 0111 0.777 251 1111 1011 0.980 44 0010 1100 0.172 96 0110 0000 0.375 148 1001 0100 0.578 200 1100 1000 0.781 252 1111 1100 0.984 45 0010 1101 0.176 97 0110 0001 0.379 149 1001 0101 0.582 201 1100 1001 0.785 253 1111 1101 0.988 46 0010 1110 0.180 98 0110 0010 0.383 150 1001 0110 0.586 202 1100 1010 0.789 254 1111 1110 0.992 47 0010 1111 0.184 99 0110 0011 0.387 151 1001 0111 0.590 203 1100 1011 0.793 255 1111 1111 0.996 48 0011 0000 0.188 100 0110 0100 0.391 152 1001 1000 0.594 204 1100 1100 0.797 49 0011 0001 0.191 101 0110 0101 0.395 153 1001 1001 0.598 205 1100 1101 0.801 50 0011 0010 0.195 102 0110 0110 0.398 154 1001 1010 0.602 206 1100 1110 0.805 51 0011 0011 0.199 103 0110 0111 0.402 155 1001 1011 0.605 207 1100 1111 0.809

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Table 12. RGB Duty Cycle Control Settings

RGB_D4 RGB_D3 RGB_D2 RGB_D1 RGB_D0 DC(%) FLASH_PER3 FLASH_PER2 FLASH_PER1 FLASH_PER0 P(s)

0 0 0 0 0 0.00 0 0 0 0 1 0 0 0 0 1 3.23 0 0 0 1 1.5 0 0 0 1 0 6.45 0 0 1 0 2 0 0 0 1 1 9.68 0 0 1 1 2.5 0 0 1 0 0 12.90 0 1 0 0 3 0 0 1 0 1 16.13 0 1 0 1 3.5 0 0 1 1 0 19.35 0 1 1 0 4 0 0 1 1 1 22.58 0 1 1 1 4.5 0 1 0 0 0 25.80 1 0 0 0 5 0 1 0 0 1 29.03 1 0 0 1 5.5 0 1 0 1 0 32.25 1 0 1 0 6 0 1 0 1 1 35.48 1 0 1 1 6.5 0 1 1 0 0 38.70 1 1 0 0 7 0 1 1 0 1 41.93 1 1 0 1 7.5 0 1 1 1 0 45.15 1 1 1 0 8 0 1 1 1 1 48.38 1 1 1 1 Continuous 1 0 0 0 0 51.60 1 0 0 0 1 54.83 1 0 0 1 0 58.05 FLASH_ON2 FLASH_ON1 FLASH_ON0 ON_TIME (s) 1 0 0 1 1 61.23 0 0 0 0.1 1 0 1 0 0 64.50 0 0 1 0.15 1 0 1 0 1 67.73 0 1 0 0.2 1 0 1 1 0 70.95 0 1 1 0.25 1 0 1 1 1 74.18 1 0 0 0.3 1 1 0 0 0 77.40 1 0 1 0.4 1 1 0 0 1 80.63 1 1 0 0.5 1 1 0 1 0 83.85 1 1 1 0.6 1 1 0 1 1 87.08 1 1 1 0 0 90.30 1 1 1 0 1 93.53 1 1 1 1 0 96.75 1 1 1 1 1 99.98

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Table 13. PWM Frequency and Duty Cycle Settings

PWM FREQUENCY TABLE PWM_D DUTY CYCLE

PWM_F2 PWM_F1 PWM_F0 F (Hz) PWM2_D3 PWM2_D2 PWM2_D1 PWM2_D0 D_cycle (pu)

0 0 0 15600 0 0 0 0 0.0625 0 0 1 7800 0 0 0 1 0.125 0 1 0 4500 0 0 1 0 0.1875 0 1 1 3000 0 0 1 1 0.25 1 0 0 2000 0 1 0 0 0.3125 1 0 1 1500 0 1 0 1 0.375 1 1 0 1000 0 1 1 0 0.4375 1 1 1 500 0 1 1 1 0.5

1 0 0 0 0.5625 1 0 0 1 0.625 1 0 1 0 0.6875 1 0 1 1 0.75 1 1 0 0 0.8125 1 1 0 1 0.875 1 1 1 0 0.9375 1 1 1 1 1

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GPIO1

GPIO

CONTROL

GPIO2

GPIO3

I2C

SETTINGS

GPIO FUNCTION

ANDMODE

TPS65800

CONFIGURATIONMODES: 1-OUTPUT 2-ADC TRIGGERCONTROL 3-LDC0ENABLE 4-CHARGEVOLTAGESELECTION

CONFIGURATIONMODES: 1-OUTPUT 2-SM1/SM2STANDBY CONTROL INPUT 3-SM1ON/OFFCONTROL INPUT 4-INTERRUPT REQUEST CONTROL INPUT

GENERATES PINHI LO TRANSITIONINT ®

CONFIGURATIONMODES: 1-OUTPUT 2-SM2 CONTROL 34-GENERATES PINHI LO TRANSITION

ON/OFF

INTERRUPT REQUEST CONTROL INPUT

INT ®

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

FUNCTIONALITY GUIDE – GENERAL PURPOSE INPUTS/OUTPUTS

GPIO3 FUNCTIONS

CONFIGURED AS OUTPUT CONFIGURED AS INPUT POWER-UP

OUTPUT LEVEL Io(max) A/D CONVERSION START TRIGGER

HI or LO at output set 5 Falling or rising edge selected via I2C Input, no mode

via I2C selected

GPIO2 FUNCTIONS

CONFIGURED AS OUTPUT CONFIGURED AS INPUT POWER-UP

OUTPUT LEVEL Io(max) HOST INTERRUPT SM2 ENABLE

mA REQUEST

HI or LO at output set 5 Set INT pin to LO via I2C GPIO2 level sets SM2 converter ON/OFF operation. Input, no mode

via I2C when GPIO2 pin edge is GPIO2 pin level (HI or LO) for ON operation selected

detected. Rising or falling selected via I2C

edge detection selected via

I2C

The host interrupt request and SM2 enable GPIO2 functions are mutually exclusive,

and they should NOT be configured simultaneously

GPIO1 FUNCTIONS

CONFIGURED AS OUTPUT CONFIGURED AS INPUT POWER-UP

OUTPUT LEVEL Io(max) HOST INTERRUPT SM1 ENABLE SM1 AND SM2 STANDBY

mA REQUEST CONTROL

HI or LO at output set 5 Set INT pin to LO via I2C GPIO1 level sets SM1 GPIO1 level sets SM2 and Input, no mode

via I2C when GPIO1 pin edge is converter ON/OFF SM1 converters in standby selected

detected. Rising or falling operation. GPIO2 pin mode. GPIO1 pin level (HI

edge detection set via I2C level (HI or LO) for ON or LO) for standby mode

operation set via I2C set selected via I2C

The host interrupt request, SM1 enable and SM1/SM2 standby control GPIO1

functions are mutually exclusive, and they should NOT be configured

simultaneously.

DEFAULT

Figure 57. Required External Components, Recommended Values, External Connections

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C ENB

Multiplexer

SET

CLR

GPIO

SignalPin

HI=RisingEdge,

LO=FallingEdge

UVLO

GPIOConfig= OUTPUT

Equivalentcircuitforinternal

logicwhenconfiguredasedge

interruptwithnomasking

I CINTACKREAD

ommand?

INT INT

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

General Purpose I/Os — GPIO 1, 2, 3

The TPS65800 integrates 3 general purpose open drain ports (GPIOs) that can be configured as selectable inputs or outputs. When configured as outputs the output level can be set to LO or HI via I2C commands. When the GPIOs are configured as inputs the action to be taken when a transition or HI/LO level is detected at the GPIO pin is selectable via I2C.

When configured as inputs the GPIOs can be set in the following modes:

1. Interrupt request: In this mode of operation, a transition at the GPIO pin generates an interrupt request at the interrupt controller. The GPIO interrupt request can be masked at the INT_MASK register. This operation mode is available for GPIO’s 1 and 2.

2. SM1 and SM2 control: The GPIO’s can be used to turn the converters SM1 and SM2 ON/OFF, as well as setting them in standby mode. This control mode is available for GPIO1 (SM1 on/off and SM1/SM2 standby) and GPIO2 (SM2 on/off control).

3. ADC trigger: GPIO3 can be configured as an external ADC trigger. The GPIO3 trigger configuration bit is located at the ADC register ADC_DELAY.

GPIOs Input Level Configuration

When using I2C commands, the GPIO1 and GPIO2 pins can be configured as logic output signals or as level-controlled inputs which enables (or disables) the switch mode converters SM1 and/or SM2. These pins may also be configured as rising- or falling-edge-triggered inputs to externally control the generation of an interrupt signal ( INT), if desired.

The GPIO3 pin may be used as an external trigger source to start an A/D conversion cycle or as a logic output. See Figure 58 for a description of the logic used for GPIO1 and GPIO2 inputs when configured for

edge-triggered interrupt generation. The signal from the GPIO pin input is double-latched before being sent to the interrupt contoller logic. The inversion of the Q output from the first flip-flop must be HI to allow the output latch to be cleared when a READ command occurs. On the initial edge of the GPIO signal, the Q output of the flip-flop is set (HI). The INT line is asserted (LO) after the initial selected edge from the GPIO pin. On the next falling (or rising) edge of the GPIO pin, the interrupt can again be cleared (which allows the INT pin to go back high). The INT signal is cleared (set back HI) after an I2C READ operation is performed.

Thus, two successive edges of the GPIO signal, followed by an I2C READ command, are required to clear the INT pin output. If no I2C READ commands occur, repeatedly applying edges to the GPIO pin does not toggle the state of the INT pin output.

In addition to an I2C READ command after two GPIO edges, a UVLO event or reconfiguration of the GPIO pins as outputs also de-asserts the INT signal.

Figure 58. GPIO 1 or GPIO2 Configured as an Interrupt Request Input

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Function Implementation: I2C Commands × GPIO Commands

Some of the GPIO SM1/SM2 control functions overlap I2C register control functions. Table 14 describes the TPS65800 action when the GPIO’s command and I2C registers commands are not compatible with each other.

Table 14. GPIO Commands and I2C Registers Commands

SM1 AND SM2 ON/OFF I2C COMMAND GPIO COMMAND SM1 OR SM2 MODE SET

CONVERTER DISABLED DON’T CARE DISABLED

CONVERTER ENABLED CONVERTER ENABLED ENABLED

DON’T CARE CONVERTER DISABLED DISABLED

SM1 AND SM2 STANDBY I2C COMMAND GPIO COMMAND SM1 OR SM2 MODE SET

DO NOT SET STANDBY DON’T CARE NORMAL

SET STANDBY SET STANDBY STANDBY

DON’T CARE DO NOT SET STANDBY NORMAL

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GPIO Configuration Table

Table 15 describes the I2C register settings required to program the available GPIO modes.

Table 15. Recommended GPIO Configuration Procedure

GPIO MODE I2C I2C REGISTER BIT SETTING ADDITIONAL DETAILS

GPIO3 = OUTPUT GPIO3 GPIO3I/O=HI AND GPIO3OUT=HI GPIO3 PIN SET TO HIGH IMPEDANCE

GPIO3 =INPUT GPIO3 AND GPIO3I/O=LO AND ADC_TRG_GPIO3=HI AND GPIO3 pin rising edge triggers ADC ADC CONVERSION ADC_DELAY EDGE_GPIO3=HI conversion START TRIGGER

GPIO2 = OUTPUT GPIO12 GPIO2I/O=HI AND GPIO2OUT=HI GPIO2 PIN SET TO HIGH IMPEDANCE

GPIO2=INPUT, GPIO12 AND GPIO2I/O=LO AND GPIO2INT=HI AND INT pin HI → LO → HI at V(GPIO2) falling HOST INTERRUPT GPIO3 GPIO2LVL=HI AND GPIO2SM2=LO edge REQUEST

GPIO2=INPUT, GPIO12 AND GPIO2I/O=LO AND GPIO2INT=LO AND SM2 converter ON at V(GPIO2) = HI SM2 ENABLE GPIO3 GPIO2LVL=HI AND GPIO2SM2=HI

GPIO1 = OUTPUT GPIO12 GPIO1I/O=HI AND GPIO1OUT=HI GPIO1 PIN SET TO HIGH IMPEDANCE

GPIO1=INPUT, GPIO12 AND GPIO1I/O=LO AND GPIO1INT=HI AND INT pin HI → LO → HI at V(GPIO1) falling HOST INTERRUPT GPIO3 GPIO1LVL=HI AND GPIO1SM1=LO AND edge REQUEST GPIO1SMSBY=LO

GPIO1=INPUT, GPIO12 AND GPIO1I/O=LO AND GPIO1INT=LO AND SM1 converter ON at V(GPIO1) = HI SM1 ENABLE GPIO3 GPIO1LVL=HI AND GPIO1SM1=HI AND

GPIO1=INPUT, GPIO12 AND GPIO1I/O=LO AND GPIO1INT=LO AND SM1/SM2 converter standby set at SM1/SM2 STANDBY GPIO3 GPIO1LVL=HI AND GPIO1SM1=LO AND V(GPIO1) = HI CONTROL GPIO1SMSBY=HI

REGISTERS

MODE

GPIO3I/O=HI AND GPIO3OUT=LO V(GPIO3) = V

GPIO3I/O=LO AND ADC_TRG_GPIO3=HI AND GPIO3 pin falling edge triggers ADC EDGE_GPIO3=LO conversion

MODE

GPIO2I/O=HI AND GPIO2OUT=LO V(GPIO2) = V

GPIO2I/O=LO AND GPIO2INT=HI AND INT pin HI → LO → HI at V(GPIO2) rising GPIO2LVL=HI AND GPIO2SM2=LO edge

GPIO2I/O=LO AND GPIO2INT=LO AND SM2 converter ON at V(GPIO2) = LO GPIO2LVL=LO AND GPIO2SM2=HI

MODE

GPIO1I/O=HI AND GPIO1OUT=LO V(GPIO1) = V

GPIO1I/O=LO AND GPIO1INT=HI AND INT pin HI → LO → HI at V(GPIO1) rising GPIO1LVL=LO AND GPIO1SM1=LO AND edge GPIO1SMSBY=LO

GPIO1SMSBY=LO GPIO1I/O=LO AND GPIO1INT=LO AND SM1 converter ON at V(GPIO1) = LO

GPIO1LVL=LO AND GPIO1SM1=HI AND GPIO1SMSBY=LO

GPIO1I/O=LO AND GPIO1INT=LO AND SM1/SM2 converter standby set at GPIO1LVL=LO AND GPIO1SM1=LO AND V(GPIO1) = LO GPIO1SMSBY=HI

TPS65800

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TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

GPIOs — I2C Registers

The I2C registers that control GPIO-related functions are shown below. The HEX address for each register is shown by the register name, together with the R or W functionality for the register bits. Shaded values indicate default initial power-up values.

B7 B6 B5 B4 B3 B2 B1 B0

GPIO12, ADDRESS=1B, ALL BITS R/W Bit Name GPIO2I/O GPIO1I/O GPIO2OUT GPIO1OUT GPIO2LVL GPIO1LVL GPIO1SMSBY GPIO1SM1 Function GPIO2 MODE GPIO1 MODE SET GPIO2 SET GPIO1 GPIO2 EDGE GPIO1 EDGE GPIO 1 GPIO1

When 0 INPUT INPUT LOW LOW RISING EDGE, RISING EDGE, DISABLED DISABLED

When 1 OUTPUT OUTPUT HIGH HIGH FALLING FALLING ENABLED ENABLED

GPIO3, ADDRESS=1C, ALL BITS R/W Bit Name GPIO3I/O GPIO3OUT LDO0_EN CHG_VOLT NOT USED GPIO2 INT GPIO1 INT GPIO2SM2 Function GPIO3 MODE SET GPIO3 LDO0 ON/OFF CHARGE NOT USED GPIO2 GPIO1 SM2 ON/OFF

LEVEL CONTROL VOLTAGE TRIGGERS TRIGGERS CONTROL

(OUTPUT SAFETY BIT INT:HI → LO INT:HI → LO

ONLY)

When 0 INPUT LOW OFF 4.20 V NOT USED DISABLED DISABLED DISABLED When 1 OUTPUT HIGH ON 4.36 V NOT USED ENABLED ENABLED ENABLED

LEVEL LEVEL AND LEVEL AND LEVEL CONTROLS CONTROLS

(OUTPUT (OUTPUT DETECTION DETECTION SM1 AND SM2 SM1 ON/OFF

ONLY) ONLY) STANDBY

ON/OFF

LO LEVEL LO LEVEL

EDGE, HI EDGE, HI

LEVEL LEVEL

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F +

2p LC

+ 27.7 kHz (a) for L + 3.3 mH and C + 10 mF

target

OUT

0.3 I

OUT_MAX

1 *

OUT

IN_MAX

Dt +

OUT

1 *

OUT

Lmax

+ I

OUTmax

)

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

APPLICATION INFORMATION

INDUCTOR AND CAPACITOR SELECTION — CONVERTERS SM1 AND SM2

SM1 and SM2 are designed with internal voltage mode compensation and the stabilization is based on choosing an LC filter that has a corner frequency around 27 kHz. It is not recommended to use LC values that would be outside the range of 13 kHz to 40 kHz.

Equation 9 calculates the corner frequency of the output LC filter. The standard recommended LC values are 3.3

µ H and 10 µ F.

The inductor value, along with the input voltage VIN, output voltage V ripple current. Typically the ripple current target is 30% of the full load current. At light loads it is desirable for ripple current to be less then 150% of the light load current.

The inductor should be chosen with a rating to handle the peak ripple current., if an inductor’s current gets higher than its rated saturation level (DCR), the inductance starts to fall off, and the inductor’s ripple current increases exponentially. The DCR of the inductor plays an important role in efficiency and size of the inductor. Larger diameter wire has less DCR but may increase the size of the inductor

Equation 10 calculates the target inductor value. If an inductor value has already been chosen, Equation 11 ,

calculates the inductor’s ripple current under static operating conditions. The ripple amplitude can be calculated during the on time (positive ramp) or during the off time (negative ramp). It is easiest to calculate the ripple using the off time, because the inductor’s voltage is the output voltage.

and switching frequency f define the

OUT

(9)

Equation 12 calculates the peak current due to the output load and ripple current

For a faster transient response, a lower inductor and higher capacitance allows the output current to ramp faster, while the addition capacitance holds up the output longer (a 2.2- µ H inductor in combination with a 22- µ F output capacitor are recommended).

The highest inductor current occurs at the maximum input voltage. The peak inductor current during a transient may be higher than the steady state peak current and should be considered when choosing an inductor. Monitoring the inductor current for non-saturation operation during a transient of 1.2 × I_loadmax at Vin_max ensures adequate saturation margin.

Table 16. Inductors for Typical Operation Conditions

DEVICE INDUCTOR VALUE TYPE COMPONENT SUPPLIER

DCDC3 converter 3.3 µ H CDRH2D14NP-3R3 Sumida

3.3 µ H PDS3010-332 Coilcraft

3.3 µ H VLF4012AT-3R3M1R3 TDK

2.2 µ H VLF4012AT-2R2M1R5 TDK

2.2 µ H NR3015T2R2 Taoup-Uidem

(10)

(11)

(12)

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RMSCout

1 *

OUT

2 L f

RMSCout

1 *

OUT

L f

8 Cout f

) ESR

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

APPLICATION INFORMATION (continued)

Table 16. Inductors for Typical Operation Conditions (continued)

DEVICE INDUCTOR VALUE TYPE COMPONENT SUPPLIER

DCDC2 converter 3.3 µ H CDRH2D18/HPNP-3R3 Sumida

3.3 µ H VLF4012AT-3R3M1R3 TDK

2.2 µ H VLCF4020-2R2 TDK

DCDC1 converter 3.3 µ H CDRH3D14/HPNP-3R2 Sumida

3.3 µ H CDRH4D28C-3R2 Sumida

3.3 µ H MSS5131-332 Coilcraft

2.2 µ H VLCF4020-2R2 TDK

OUTPUT CAPACITOR SELECTION, SM1, SM2 CONVERTERS

The advanced fast response voltage mode control scheme of the SM1, SM2 converters implemented in the TPS65020 allow the use of small ceramic capacitors with a typical value of 10 µ F for a 3.3- µ H inductor, without having large output voltage under and overshoots during heavy load transients.

Ceramic capacitors having low ESR values have low output voltage ripple, and recommended values and manufacturers are listed in Table 1 . Often, due to the low ESR, the ripple current rating of the ceramic capacitor is adequate to meet the inductor’s currents requirements.

The RMS ripple current is calculated as:

At nominal load current, the inductive converters operate in PWM mode. The overall output voltage ripple is the sum of the voltage spike caused by the output capacitor ESR plus the voltage ripple caused by charging and discharging the output capacitor: The output voltage ripple is maximum at the highest input voltage Vin.

At light load currents, the converters operate in PFM and the output voltage ripple is dependent on the output capacitor value. The output voltage ripple is set by the internal PFM output voltage comparator delay and the external capacitor. The typical output voltage ripple is less than 1% of the nominal output voltage.

Table 17. Input/Output Capacitors for Typical Operation Conditions

CAPACITOR VALUE CASE SIZE COMPONENT SUPPLIER COMMENTS

22 µ F 1260 TDK C3216X5R0J226M Ceramic 22 µ F 1260 Taiyo Yuden JMK316BJ226ML Ceramic 10 µ F 0805 Taiyo Yuden JMK212BJ106M Ceramic 10 µ F 0805 TDK C2012X5R0J106M Ceramic 22 µ F 0805 TDK C2012X5R0J226MT Ceramic 22 µ F 0805 Taiyo Yuden JMK212BJ226MG Ceramic

(13)

(14)

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R1 +

SMxOUT

* 1ƫR2

target

OUT

0.3 I

OUT_MAX

1 *

OUT

IN_MAX

fsw

+ 3.35 mH, 3.3 mH is a good target.

C +

L[2 p fc]

+ 10.5 mF 10 mF is a good target.

ISET

SET

PGM

+ 1 kW

DPPM

DPPM_OUT

DPPM

+ 3.74 kW

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

INPUT CAPACITOR SELECTION, SM1, SM2 CONVERTERS

Buck converters have a pulsating input current that can generate high input voltage spikes at V input capacitor is required to filter the input voltage, minimizing the interference with other circuits connected to the same power supply rail. Each dc-dc converter requires a 10- µ F ceramic input capacitor on its input pin.

OUTPUT VOLTAGE SELECTION, SM1, SM2 CONVERTERS

Typically the output voltage is programmed by the I2C. An external divider can be added to raise the output voltage, if the available I2C values do not meet the application requirements. Care must be taken with this special option, because this external divider (gain factor) would apply to any selected I2C output voltage value for this converter.

Equation 16 calculates R1, Let R2 = 20 k Ω :

Where V

is the I2C selected voltage, is the desired output voltage and R1/R2 is the feedback divider.

DESIGN EXAMPLES

SM1, SM2 CONVERTER DESIGN EXAMPLE

. A low ESR

(16)

Design Conditions and Parametrs for SM1 or SM2:

Vin_SM1/2: 4.6V typical (May be less if input source is limited). Vout_SM1/2: 1.24 V Iout_max: 0.6 A fsw = 1500 kHz fc = 25 kHz

CHARGER DESIGN EXAMPLE Design Conditions and Parameters for Charger:

Vout: 4.6 V; (OUT pin is input to charger) Fast-charge current, I

: 1 A

PGM

DPPM-OUT threshold: 4.3 V; (charging current reduces when OUT falls to this level) Safety timer: 5 h Battery short circuit delay, t

: 47 µ s; (Delays BAT short circuit during hot plug of battery)

DELAY

TS temperature range: disabled K

=400; V

SET

=2.5 V; K

= 1.15; I

DPPM

= 100 µ A; K

TMR

=0.36 s/ Ω

Program Fast-Charge Current Level:

(17)

(18)

Program DPPM_OUT Voltage Level (Level at Which Charging Current Reduces)

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(19)

(20)

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DPPM

+ t

DELAY

DPPM

+ 4.7 Nf

TMR

SAFETY*HR

3600 secńhr

TMR

+ 50 kW

TPS65800

SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007

Program BAT Short-Circuit Delay (Used for Inserting Battery)

Program 5-Hour Safety Timer

Disable/Program TS

= 49.9 k Ω – fixed resistor to disable TS input.

= ITS× R

The TS pin has a 20- µ A current source output that biases the resistor or thermistor. If V

2.5-V window, normal operation is allowed. If a 503AT thermistor is used, the typical range is 4 ° C to 41 ° C.

= 20 µ A × 49.9 k Ω = 0.998 V

is within the 0.5- to

(21)

(22)

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PACKAGE OPTION ADDENDUM

www.ti.com

5-Feb-2007

PACKAGING INFORMATION

Orderable Device Status

(1)

Package

Type

Package Drawing

Pins Package

Qty

Eco Plan

TPS65800RTQR ACTIVE QFN RTQ 56 2000 Green (RoHS &

no Sb/Br)

TPS65800RTQRG4 ACTIVE QFN RTQ 56 2000 Green (RoHS &

no Sb/Br)

TPS65800RTQT ACTIVE QFN RTQ 56 250 Green (RoHS &

no Sb/Br)

TPS65800RTQTG4 ACTIVE QFN RTQ 56 250 Green (RoHS &

no Sb/Br)

(1)

The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in

a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device.

(2)

Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check

http://www.ti.com/productcontent for the latest availability information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements

for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(2)

Lead/Ball Finish MSL Peak Temp

CU NIPDAU Level-3-260C-168 HR

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder

temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Addendum-Page 1

PACKAGE MATERIALS INFORMATION

www.ti.com

TAPE AND REEL INFORMATION

11-Mar-2008

*All dimensions are nominal

Device Package

Type

TPS65800RTQR QFN RTQ 56 2000 330.0 16.4 8.3 8.3 2.25 12.0 16.0 Q2

TPS65800RTQT QFN RTQ 56 250 180.0 16.4 8.3 8.3 2.25 12.0 16.0 Q2

Package

Drawing

Pins SPQ Reel

Diameter

(mm)

Reel

Width

W1 (mm)

A0 (mm) B0 (mm) K0 (mm) P1

(mm)W(mm)

Pin1

Quadrant

Pack Materials-Page 1

PACKAGE MATERIALS INFORMATION

www.ti.com

11-Mar-2008

*All dimensions are nominal

Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)

TPS65800RTQR QFN RTQ 56 2000 346.0 346.0 33.0

TPS65800RTQT QFN RTQ 56 250 190.5 212.7 31.8

Pack Materials-Page 2

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TEXAS INSTRUMENTS TPS65800 Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual

FEATURES

APPLICATIONS

DESCRIPTION

FUNCTIONAL BLOCK DIAGRAM

ABSOLUTE MAXIMUM RATINGS

DISSIPATION RATINGS

RECOMMENDED OPERATING CONDITIONS

ELECTRICAL CHARACTERISTICS – I2C INTERFACE

ELECTRICAL CHARACTERISTICS – SYSTEM SEQUENCING AND OPERATING MODES

ELECTRICAL CHARACTERISTICS – POWER PATH AND CHARGE MANAGEMENT

ELECTRICAL CHARACTERISTICS – POWER PATH AND CHARGE MANAGEMENT (Continued)

ELECTRICAL CHARACTERISTICS – POWER PATH AND CHARGE MANAGEMENT (Continued)

ELECTRICAL CHARACTERISTICS – LINEAR REGULATORS

ELECTRICAL CHARACTERISTICS – LINEAR REGULATORS (continued)

ELECTRICAL CHARACTERISTICS – SWITCHED MODE SM1 STEP DOWN CONVERTER

ELECTRICAL CHARACTERISTICS – SWITCHED MODE SM2 STEP DOWN CONVERTER

ELECTRICAL CHARACTERISTICS – GPIOs

ELECTRICAL CHARACTERISTICS – ADC

ELECTRICAL CHARACTERISTICS – LED AND PWM DRIVERS

PIN ASSIGNMENT

PIN DESCRIPTION, REQUIRED EXTERNAL COMPONENTS

APPLICATION DIAGRAM

TYPICAL CHARACTERISTICS – POWER PATH MANAGEMENT

TYPICAL CHARACTERISTICS – LINEAR REGULATORS 0, 1, 2

TYPICAL CHARACTERISTICS – LINEAR REGULATORS 3, 4, 5

TYPICAL CHARACTERISTICS – SM1 AND SM2 BUCK CONVERTERS

TYPICAL CHARACTERISTICS – DRIVERS

SERIAL INTERFACE

Overview

Register Default Values

I2C Address

Incremental Read

I2C Bus Release

Sleep Mode Operation

I2C Bus Error Recovery

I2C Communication Protocol

I2C Read and Write Operations

Valid Write Sequences

One Byte Write

Valid Read Sequences

Non-Valid Sequences

TPS65800 INTERNAL REGISTER MAP

FUNCTIONALITY REFERENCE GUIDE – HOST INTERFACE AND SYSTEM SEQUENCING

INTERRUPT CONTROLLER AND SYSTEM SEQUENCING

Overview

SYSTEM SEQUENCING AND TPS65800 OPERATING MODES

TPS65800 OPERATING MODE CONTROLS

SEQUENCING AND OPERATING MODES – I2C REGISTERS

INTERRUPT CONTROLLER

SYSTEM STATUS — I2C REGISTERS

INTERRUPT CONTROLLER – I2C REGISTERS

FUNCTIONALITY GUIDE — SYSTEM POWER AND CHARGE MANAGEMENT

POWER PATH AND CHARGE MANAGEMENT

Overview

POWER PATH MANAGEMENT FUNCTION

Detecting the System Status

Power Path Logic: Priority Algorithm

Input Current Limit

System Voltage Regulation

Input Overvoltage Detection

Output Short-Circuit Detection

Battery Short Circuit Detection

Boot-Up Algorithm

No Battery Detection Circuit

Using the Input Power to Run the System and Charge the Battery Pack

BATTERY CHARGE MANAGEMENT FUNCTION

Operating Modes

Battery Preconditioning

CONSTANT-CURRENT CHARGING

CHARGE TERMINATION AND RECHARGE

BATTERY VOLTAGE REGULATION, CHARGE VOLTAGE

TEMPERATURE QUALIFICATION

DYNAMIC POWER PATH MANAGEMENT

CHARGER OFF MODE

PRECHARGE SAFETY TIMER

CHARGE SAFETY TIMER