TEXAS INSTRUMENTS bq24090, bq24091, bq24092, bq24093 Technical data

1 Fm

1kW

1.5kW

2kW

Disconnect after Detection

Battery Pack

VBUS

GND

D+

D-

USB Port

DC+

GND

Adaptor

VDD

D-

D+

GND

TTDM

Host

System Load

ISET/100/500mA

ISET

VSS

PRETERM

ISET2

CHG

OUT

bq2409x

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bq24090, bq24091 bq24092, bq24093

SLUS968B –JANUARY 2010–REVISED JUNE 2010

1A, Single-Input, Single Cell Li-Ion Battery Charger

Check for Samples: bq24090, bq24091, bq24092, bq24093

FEATURES

• CHARGING – 1% Charge Voltage Accuracy – 10% Charge Current Accuracy – Pin Selectable USB 100mA and 500mA

Maximum Input Current Limit

– Programmable Termination and Precharge

Threshold

• PROTECTION – 6.6V Over-Voltage Protection – Input Voltage Dynamic Power Management – 125°C Thermal Regulation; 150°C Thermal

Shutdown Protection

– OUT Short-Circuit Protection and ISET

Short Detection

– Operation Over JEITA Range via Battery

NTC – ½ Fast-Charge-Current at Cold,

4.06V at Hot, bq24092/3

– Fixed 10 Hour Safety Timer

• SYSTEM – Automatic Termination and Timer Disable

Mode (TTDM) for Absent Battery Pack With

Thermistor – Status Indication – Charging/Done – Available in Small 10-Pin MSOP Package

APPLICATIONS

• Smart Phones

• PDAs

• MP3 Players

• Low-Power Handheld Devices

DESCRIPTION

The bq2409x series of devices are highly integrated Li-ion linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The bq2409x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10 hour safety timer.

The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.

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.

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.

bq24090, bq24091 bq24092, bq24093

SLUS968B –JANUARY 2010–REVISED JUNE 2010

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

DESCRIPTION CONTINUED

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The pre-charge current and termination current threshold are programmed via an external resistor. The fast charge current value is also programmable via an external resistor.

ORDERING INFORMATION

PART # V

bq24090 4.20 V 6.6 V No 10kΩ NTC Yes 10 PIN 5x3mm bq24091 4.20 V 6.6 V No 100kΩ NTC Yes 10 PIN 5x3mm bq24092 4.20 V 6.6 V Yes 10kΩ NTC Yes 10 PIN 5x3mm bq24093 4.20 V 6.6 V Yes 100kΩ NTC Yes 10 PIN 5x3mm

O(REG)

OVP

JEITA TS/CE PG PACKAGE Marking

2 2 2 2

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bq24090 bq24091 bq24092 bq24093

ABSOLUTE MAXIMUM RATINGS

(1)

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

VALUE UNIT

IN (with respect to VSS) –0.3 to 7 V

Input Voltage

Input Current IN 1.25 A Output Current (Continuous) OUT 1.25 A

Output Sink Current CHG 15 mA T T

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

Junction temperature –40 to 150 °C

Storage temperature –65 to 150 °C

STG

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. All voltage values are with respect to the network ground terminal unless otherwise noted.

PACKAGE DISSIPATION RATINGS

PACKAGE R

5x3mm MSOP 52°C/W 48°C/W 1.92 W 19.2 mW/°C

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

connected to the ground plane by a 2×3 via matrix

OUT (with respect to VSS) –0.3 to 7 V PRE-TERM, ISET, ISET2, TS, CHG, PG, ASI, ASO (with respect to

VSS)

(1) (2)

qJA

qJC

TA≤ 25°C DERATING FACTOR

POWER RATING TA> 25°C

–0.3 to 7 V

Product Folder Link(s): bq24090 bq24091 bq24092 bq24093

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bq24090, bq24091 bq24092, bq24093

SLUS968B –JANUARY 2010–REVISED JUNE 2010

RECOMMENDED OPERATING CONDITIONS

(1)

MIN MAX UNIT

OUT

PRE-TERM

ISET

IN voltage range 3.5 7 V IN operating voltage range, Restricted by V

DPM

and V

OVP

4.45 6.45 V Input current, IN pin 1.0 A Current, OUT pin 1.0 A Junction temperature 0 125 °C Programs precharge and termination current thresholds 1 10 kΩ Fast-charge current programming resistor 0.675 49.9 kΩ 10k NTC thermistor range without entering BAT_EN or TTDM 1.66 258 kΩ

(1) Operation with VINless than 4.5V or in drop-out may result in reduced performance.

ELECTRICAL CHARACTERISTICS

Over junction temperature range 0°C ≤ TJ≤ 125°C and recommended supply voltage (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

INPUT

UVLO Undervoltage lock-out Exit VIN: 0V → 4V Update based on sim/char 3.15 3.3 3.45 V V

HYS_UVLO

IN-DT

HYS-INDT

DGL(PG_PWR)

DGL(PG_NO-

PWR)

OVP

DGL(OVP-SET)

HYS-OVP

DGL(OVP-REC)

IN-DPM

IN-USB-CL

Hysteresis on V Input power good detection threshold

is V

+ V

OUT

IN-DT

Hysteresis on V Deglitch time on exiting sleep. 45 ms Deglitch time on V

down. Same as entering sleep. PG = OC, V Input over-voltage protection threshold VIN: 5V → 7V 6.5 6.65 6.8 V Input over-voltage blanking time VIN: 5V → 7V 113 ms Hysteresis on OVP VIN: 7V → 5V 95 mV

Deglitch time exiting OVP 30 ms

USB/Adaptor low input voltage protection. Restricts lout at V

USB input I-Limit 100mA ISET2 = Float; R USB input I-Limit 500mA ISET2 = High; R

ISET SHORT CIRCUIT TEST

ISET_SHORT

DGL_SHORT

OUT_CL

Highest Resistor value considered a Riset: 600Ω → 250Ω, I fault (short). Monitored for Iout>90mA Reset.

Deglitch time transition from ISET short to Iout disable

Maximum OUT current limit Regulation (Clamp)

BATTERY SHORT PROTECTION

OUT(SC)

OUT(SC-HYS)

OUT(SC)

OUT pin short-circuit detection threshold/ precharge threshold

OUT pin Short hysteresis 77 mV Source current to OUT pin during

short-circuit detection

UVLO_RISE

IN-DT

falling 175 227 280 mV

falling V

power Time measured from VIN: 5V → 3.2V 1ms fall-time to

HYS-INDT

IN-DPM

VIN: 4V→0V, V

UVLO_FALL

(Input power good if VIN> V V

OUT OUT

= V

UVLO_RISE–VHYS-UVLO

+ V

= 3.6V, VIN: 3.5V → 4V

OUT

IN-DT

);

30 80 145 mV

= 3.6V, VIN: 4V → 3.5V 31 mV

Time measured from VIN: 0V → 5V 1ms rise-time to PG = low, V

OUT

= 3.6V

29 ms

Time measured from VIN: 7V → 5V 1ms fall-time to PG = LO

Feature active in USB mode; Limit Input Source Current to 50mA; V

OUT

= 3.5V; R

ISET

= 825Ω

Feature active in Adaptor mode; Limit Input Source Current to 50mA; V

= 3.5V; R

OUT

= 825Ω 85 92 100

ISET

= 825Ω 430 462 500

ISET

latches off. Cycle power to

OUT

ISET

= 825Ω

4.34 4.4 4.46

4.24 4.3 4.36

280 500 Ω

Clear fault by cycling IN or TS/BAT_EN 1 ms VIN= 5V, V

600Ω → 250Ω, Iout latches off after t

:3V → 0.5V, no deglitch 0.75 0.8 0.85 V

OUT

Recovery ≥ V Deglitch

OUT

OUT(SC)

= 3.6V, V

+ V

= Low, R

ISET2

OUT(SC-HYS)

ISET

DGL-SHORT

; Rising, no

1.05 1.4 A

10 15 20 mA

Product Folder Link(s): bq24090 bq24091 bq24092 bq24093

bq24090, bq24091 bq24092, bq24093

SLUS968B –JANUARY 2010–REVISED JUNE 2010

ELECTRICAL CHARACTERISTICS (continued)

Over junction temperature range 0°C ≤ TJ≤ 125°C and recommended supply voltage (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

QUIESCENT CURRENT

OUT(PDWN)

OUT(DONE)

IN(STDBY)

BATTERY CHARGER FAST-CHARGE

OUT(REG)

O_HT(REG)

OUT(RANGE)

DO(IN-OUT)

OUT

ISET

PRECHARGE – SET BY PRETERM PIN

LOWV

DGL1(LOWV)

DGL2(LOWV)

PRE-TERM

PRECHG

PRE-CHG

TERMINATION – SET BY PRE-TERM PIN

TERM

PRE-TERM

%TERM Termination current formula R t

DGL(TERM)

Term-Start

Battery current into OUT pin VIN= 0V 1 OUT pin current, charging terminated VIN= 6V, V

OUT

> V

OUT(REG)

Standby current into IN pin TS = LO, VIN≤ 6V 125 mA Active supply current, IN pin 0.8 1.0 mA

Battery regulation voltage VIN= 5.5V, I Battery hot regulation Voltage,

bq24092/3 Programmed Output “fast charge”

current range Drop-Out, VIN – VOUT 325 520 mV Output “fast charge” formula V

Fast charge current factor R

Pre-charge to fast-charge transition threshold

Deglitch time on pre-charge to fast-charge transition

Deglitch time on fast-charge to pre-charge transition

TS = open, VIN= 6V, TTDM – no load on OUT pin, V

> V

OUT

VIN= 5.5V, I V

OUT(REG)

= 675 to 10.8kΩ

ISET

Adjust VIN down until I R

= 675 , ISET2=Lo (adaptor mode); TJ≤ 100°C

ISET OUT(REG)

= K

ISET

= K

ISET

= K

ISET

OUT(REG)

OUT

> V

OUT

> V

OUT ISET/IOUT ISET/IOUT ISET/IOUT

, IC enabled

= 25mA, (V = 25mA, V

> V

LOWV

OUT

> V

LOWV

; 50 < I ; 25 < I ; 10 < I

≤ VTS≤ V

TS-45°C

TS-60°C

≤ VTS≤ V

TS-0°C

TS-45°C

; VIN= 5V, ISET2=Lo,

= 0.5A, V

OUT

= 4.15V,

; VIN= 5V, ISET2 = Lo K

< 800 mA 510 540 565

OUT

< 50 mA 480 527 580 AΩ

OUT

< 25 mA 350 520 680

OUT

) 4.16 4.2 4.23 V

4.02 4.06 4.1 V

10 1000 mA

ISET/RISET

2.4 2.5 2.6 V

70 ms

32 ms

Refer to the Termination Section

< V

; R

OUT

Pre-charge current, default setting 18 20 22 Pre-charge current formula R

% Pre-charge Factor

Termination Threshold Current, default V setting R

Termination Current Threshold Formula

% Term Factor Ω/%

LOWV

PRE-TERM

< V

OUT

LOWV

= 1080Ω , R

ISET

where %I

FAST-CHG

< V

OUT

LOWV

= 1080Ω, R

ISET

where %I

FAST-CHG

> V

OUT

RCH

PRE-TERM

> V

OUT

RCH

= 750Ω K

ISET

is 10 to 50% V

> V

OUT

RCH

= 750Ω K

TERM

= High Z

= K

= High Z

= K

= 1080Ω; %I

ISET

(Ω/%) × %

PRE-CHG

, VIN= 5V, R

; R

ISET

TERM

, VIN= 5V, R

TERM

, VIN= 5V, R

× %Iset, where %Iset is 5 to 10%

PRE-TERM

= K

PRE-TERM

is 20 to 100%

PRE-TERM

is 10% to 20%

PRE-CHG

PRE-TERM

= K

PRE-CHG

= 1k; %I

(Ω/%) × %TERM (%) R

PRE-TERM

× %I

FAST-CHG

PRE-TERM

(%) R

PRE-CHG

= 2k to 10kΩ;

× %I

FAST-CHG

= 1k to 2kΩ;

× %I

FAST-CHG

= 2k to 10kΩ ;

, where %I

FAST-CHG

= 1k to 2kΩ ; R

PRE-TERM/KPRE-CHG%

, 90 100 110 Ω/%

, 84 100 117 Ω/%

9 10 11

/ K

PRE-TERM

TERM

182 200 216

ISET

174 199 224

Current for programming the term. and pre-chg with resistor. I initial PRE-TERM current.

Term-Start

is the R

PRE-TERM

= 2k, V

= 4.15V 71 75 81 mA

OUT

/ K

TERM

Deglitch time, termination detected 29 ms Elevated PRE-TERM current for,

, during start of charge to 80 85 92 mA

Term-Start

prevent recharge of full battery, Elevated termination threshold initially

active for t

Term-Start

1.25 min

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OUT-

Product Folder Link(s): bq24090 bq24091 bq24092 bq24093

bq24090, bq24091 bq24092, bq24093

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ELECTRICAL CHARACTERISTICS (continued)

Over junction temperature range 0°C ≤ TJ≤ 125°C and recommended supply voltage (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

RECHARGE OR REFRESH

Recharge detection threshold – V

RCH

Normal Temp -0.120 0.070 Recharge detection threshold – Hot V

Temp -0.130 0.080

DGL1(RCH)

DGL2(RCH)

Deglitch time, recharge threshold VIN= 5V, VTS= 0.5V, V detected t

Deglitch time, recharge threshold VIN= 5V, VTS= 0.5V, V detected in OUT-Detect Mode is time to ISET ramp

BATTERY DETECT ROUTINE

REG-BD

BD-SINK

DGL(HI/LOW

REG)

BD-HI

BD-LO

VOUT Reduced regulation during V battery detect -0.450 350

Sink current during V Regulation time at V

REG-BD

REG

or V

REG-BD

High battery detection threshold VIN= 5V, VTS= 0.5V, Battery Absent V

Low battery detection threshold VIN= 5V, VTS= 0.5V, Battery Absent V

BATTERY CHARGING TIMERS AND FAULT TIMERS

PRECHG

MAXCH

Pre-charge safety timer value 1700 1940 2250 s

Charge safety timer value 34000 38800 45000 s

BATTERY-PACK NTC MONITOR (Note 1); TS pin: 10k and 100k NTC

NTC-10k

NTC-100k

NTC-DIS-10k

NTC-DIS-100k

NTC bias current, bq24090/2 VTS= 0.3V 48 50 52 mA NTC bias current, bq24091/3 VTS= 0.3V 4.8 5.0 5.2 mA 10k NTC bias current when Charging

is disabled, bq24090/2 10k NTC bias current when Charging

is disabled, bq24091/3 INTC is reduced prior to entering

NTC-FLDBK-10k

TTDM to keep cold thermistor from VTS: Set to 1.525V 4 5 6.5 mA entering TTDM, bq24090/2

INTC is reduced prior to entering

NTC-FLDBK-100k

TTDM(TS)

HYS-TTDM(TS)

CLAMP(TS)

DGL(TTDM)

TS_I-FLDBK

TS-0°C

HYS-0°C

TS-10°C

HYS-10°C

TS-45°C

HYS-45°C

TTDM to keep cold thermistor from VTS: Set to 1.525V 1.1 1.5 1.9 mA entering TTDM, bq24091/3

Termination and timer disable mode Threshold – Enter

Hysteresis exiting TTDM VTS: 1.7V → 0.5V; Timer Enabled 100 mV TS maximum voltage clamp VTS= Open (Float) 1800 1950 2000 mV Deglitch exit TTDM between states 57 ms Deglitch enter TTDM between states 8 ms

TS voltage where INTC is reduce to keep thermistor from entering TTDM

Optional Capacitance – ESD 0.22 mF Low temperature CHG Pending 1205 1230 1255 mV

Hysteresis at 0°C 86 mV Low temperature, half charge, Normal charging to low temp charging;

bq24092/3 VTS: 0.5V → 1V Hysteresis at 10°C, bq24092/3 35 mV

High temperature at 4.1V 263 278 293 mV

Hysteresis at 45°C 10.7 mV

VIN= 5V, VTS= 0.5V, V

VIN= 5V, VTS= 0.2V, V

is time to ISET ramp

DGL(RCH)

: 4.25V → V

OUT

: 4.15V → V

OUT

: 4.25V → 3.5V in 1ms;

OUT

= 3.5V inserted; t

OUT

RCH

VIN= 5V, VTS= 0.5V, Battery Absent 7 10 mA

Restarts when entering Pre-charge; Always enabled when in pre-charge.

Clears fault or resets at UVLO, TS/BAT_EN disable, OUT Short, exiting LOWV and Refresh

VTS= 0V 27 30 34 mA

VTS= 0V 4.4 5.0 5.8 mA

VTS: 0.5V → 1.7V; Timer Held in Reset 1550 1600 1650 mV

INTC adjustment (90 to 10%; 45 to 6.6uS) takes place near this spec threshold. VTS: 1.425V → 1475 mV

1.525V

Low Temp Charging to Pending; VTS: 1.0V → 1.5V

Charge pending to low temp charging; VTS: 1.5V → 1V

Low temp charging to normal CHG; VTS: 1.0V → 0.5V

Normal charging to high temp CHG; VTS: 0.5V → 0.2V

High temp charging to normal CHG; VTS: 0.2V → 0.5V

SLUS968B –JANUARY 2010–REVISED JUNE 2010

O(REG)

-0.095 V

O(REG)

-0.105 V

O(REG)

29 ms

DGL(RCH)

O(REG)

3.6 ms

-0.400 V

O(REG)

25 ms

O(REG)

-0.150 0.050

REG-BD

+0.50 +0.15

-0.100 V

O(REG)

+0.1 V

REG-BD

765 790 815 mV

O(REG)

REG-BD

Product Folder Link(s): bq24090 bq24091 bq24092 bq24093

bq24090, bq24091 bq24092, bq24093

SLUS968B –JANUARY 2010–REVISED JUNE 2010

ELECTRICAL CHARACTERISTICS (continued)

Over junction temperature range 0°C ≤ TJ≤ 125°C and recommended supply voltage (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

TS-60°C

HYS-60°C

DGL(TS_10C)

DGL(TS)

TS-EN-10k

TS-DIS_HYS-10k

TS-EN-100k

TS-DIS_HYS-

100k

High temperature Disable, bq24092/3 170 178 186 mV

Hysteresis at 60°C, bq24092/3 11.5 mV

Deglitch for TS thresholds: 10C, bq24092/3

Deglitch for TS thresholds: 0/45/60C. Battery charging 30 ms Charge Enable Threshold, (10k NTC) VTS: 0V → 0.175V; 80 88 96 mV HYS below V

NTC)

TS-EN-10k

Charge Enable Threshold, bq24090/2 VTS: 0V → 0.175V; 140 150 160 mV HYS below V

bq24091/3

TS-EN-100k

THERMAL REGULATION

J(REG)

J(OFF)

J(OFF-HYS)

Temperature regulation limit 125 °C Thermal shutdown temperature 155 °C Thermal shutdown hysteresis 20 °C

LOGIC LEVELS ON ISET2

FLT

Logic LOW input voltage Sink 8 mA 0.4 V Logic HIGH input voltage Source 8 mA 1.4 V Sink current required for LO V Source current required for HI V ISET2 Float Voltage 575 900 1225 mV

LOGIC LEVELS ON CHG AND PG

V I

LEAK

Output LOW voltage I Leakage current into IC V

to Disable, (10k

to Disable,

High temp charge to pending; VTS: 0.2V → 0.1V

Charge pending to high temp CHG; VTS: 0.1V → 0.2V

Normal to Cold Operation; VTS: 0.6V → 1V 50 Cold to Normal Operation; VTS: 1V → 0.6V 12

VTS: 0.125V → 0V; 12 mV

VTS: 0.125V → 0V; 50 mV

= 0.4V 2 9 mA

ISET2

= 1.4V 1.1 8 mA

ISET2

= 5 mA 0.4 V

SINK

= 5V, VPG= 5V 1 mA

CHG

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Product Folder Link(s): bq24090 bq24091 bq24092 bq24093

ISET

VSS

PRETERM

ISET2

CHG

OUT

bq2409x

bq24090, bq24091 bq24092, bq24093

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PIN CONFIGURATION

PIN FUNCTIONS

NAME PIN I/O DESCRIPTION

IN 1 I

OUT 10 O battery to charge within the 10 hour safety timer window. Expected range of bypass capacitors 1mF to

PRE-TERM 4 I

ISET 2 I

ISET2 7 I

TS 9 I Mode and disable TS monitoring, Timers and Termination. Pulling pin Low disables the IC. If NTC

VSS 3 – Ground terminal CHG 8 O Low (FET on) indicates charging and Open Drain (FET off) indicates no Charging or Charge complete. PG 5 O Low (FET on) indicates the input voltage is above UVLO and the OUT (battery) voltage. NC 6 NA Do not make a connection to this pin (for internal use) – Do not route through this pin

Thermal PAD Pad device. The thermal pad must be connected to the same potential as the VSS pin on the printed circuit and Package 5x3mm

Input power, connected to external DC supply (AC adapter or USB port). Expected range of bypass capacitors 1mF to 10mF, connect from IN to VSS.

Battery Connection. System Load may be connected. Average load should not be excessive, allowing 10mF.

Programs the Current Termination Threshold (5 to 50% of Iout which is set by ISET) and Sets the Pre-Charge Current to twice the Termination Current Level.

Expected range of programming resistor is 1k to 10kΩ (2k: Ipgm/10 for term; Ipgm/5 for precharge) Programs the Fast-charge current setting. External resistor from ISET to VSS defines fast charge current

value. Range is 10.8k (50mA) to 675 Ω (800mA). Programming the Input/Output Current Limit for the USB or Adaptor source:

High = 500mAmax, Low = ISET, FLOAT = 100mAmax. Temperature sense pin connected to bq24090/2 -10k at 25°C NTC thermistor & bq24091/3 -100k at

25°C NTC thermistor, in the battery pack. Floating TS Pin or pulling High puts part in TTDM “Charger” sensing is not needed, connect this pin to VSS through an external 10 kΩ/100kΩ resistor. A 250kΩ from

TS to ground will prevent IC entering TTDM mode when battery with thermistor is removed.

There is an internal electrical connection between the exposed thermal pad and the VSS pin of the

–

board. Do not use the thermal pad as the primary ground input for the device. VSS pin must be connected to ground at all times

SLUS968B –JANUARY 2010–REVISED JUNE 2010

Product Folder Link(s): bq24090 bq24091 bq24092 bq24093

BatteryPack

VBUS

GND

D+

D-

USBPort

DC+

GND

Adaptor

VDD

D-

D+

GND

Host

SystemLoad

ISET/100/500 mA

ISET

VSS

PRETERM

ISET2

CHG

OUT

bq2409x

1 Fm

1kW

1.5kW

2kW

DisconnectafterDetection

TTDM

bq24090, bq24091 bq24092, bq24093

SLUS968B –JANUARY 2010–REVISED JUNE 2010

Typical Application Circuit: bq2409x

OUT_FAST_CHG

= 540mA; I

OUT_PRE_CHG

= 108mA; I

OUT_TERM

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= 54mA

Product Folder Link(s): bq24090 bq24091 bq24092 bq24093

OUT

Charge

Pump

IN OUT

OUTREG

REF

TJ°C

125°C

REF

ISET

Charge

Pump

PRE-TERM

75mA

CHARGE

CONTROL

OUT

TERM_EN

ISET2 (LO=ISET,HI=USB500,

FLOAT =USB100)

COLD-FLT

HOT-45 C

TTDM

5 Am 45 Am

CLAMP

= 1.4V

ColdTemperature

SinkCurrent

=45 Am

LO =TTDMMODE

HI=CHIP DISABLE

OUT

CHG

ON:

OnDuring

1stChargeOnly

OFF:

Increasedfrom 75 A to85 A form m

1stminuteofcharge.

+ _

InternalCharge

CurrentSense

w/ MultipleOutputs

USBSense

Resistor

USB100/500

REF

+ _

1.5V

FASTCHARGE

PRE-CHARGE

HI =SuspendCHG

COLD-10 C

HOT-FLT

HI =HalfCHG(JEITA)

HI =4.06Vreg(JEITA)

DISABLE

+ _

80 mV

Input Power Detect

+ _

IN-DPM

REF

0.9VFloat

TS - bq24090

+ _

Disable

SinkCurrent

=20 Am

Bq24090 isasshown

X2Gain(1:2) Term:Pre-CHGX2

TermReference

Pre-CHGReference

I x1.5V

540 A

OUT

T C

150 C ThermalShutdown

REF

OVP

REF

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FUNCTIONAL BLOCK DIAGRAM

bq24090, bq24091 bq24092, bq24093

SLUS968B –JANUARY 2010–REVISED JUNE 2010

Product Folder Link(s): bq24090 bq24091 bq24092 bq24093

Vin

Viset

Vchg

Vpg

t-time-20ms/div

2V/div

5V/div

2V/div

Vin

Viset

Vchg

Vpg

t-time-100ms/div

2V/div

5V/div

Vts

Viset

Vchg

Vpg

t-time-50ms/div

2V/div

500mV/div

Vin

Vchg

Vpg

Vout

BatteryDetectMode

t-time-20ms/div

2V/div

5V/div

2V/div

Vin

Viset

Vts

Vout

t-time-5ms/div

2V/div

1V/div

500mV/div

Viset

Vchg

Vts

Vout

1BatteryDetectCycle

Entered TTDM

t-time-10ms/div

5V/div

1V/div

bq24090, bq24091 bq24092, bq24093

SLUS968B –JANUARY 2010–REVISED JUNE 2010

TYPICAL OPERATIONAL CHARACTERISTICS

SETUP: bq2409x typical applications schematic; VIN= 5V, V

POWER UP, DOWN, OVP, DISABLE AND ENABLE WAVEFORMS

BAT

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= 3.6V (unless otherwise indicated)

Figure 1. OVP 8V Adaptor - Hot Plug Figure 2. OVP from Normal Power-up

Operation – VIN0V → 5V → 6.8V →5V

10kΩ resistor from TS to GND. 10kΩ is shorted to disable the IC. Fixed 10kΩ resistor, between TS and GND.

Figure 3. TS Enable and Disable Figure 4. Hot Plug Source w/No Battery – Battery

Detection

Figure 5. Battery Removal – GND Removed 1st, 42 Ω Load Figure 6. Battery Removal with OUT and

TS Disconnect 1st, With 100 Ω Load

Continuous battery detection when not in TTDM.

Product Folder Link(s): bq24090 bq24091 bq24092 bq24093

Viset

Vchg

V_0.1 _OUTW

Vout

BatteryDeclared Absent

t-time-20ms/div

100mV/div

1V/div

5V/div

Viset

Vchg

Vout

V_0.1 _OUTW

Battery

Threshold

Reached

t-time-500ms/div

1V/div

5V/div

1V/div

100mV/div

Viset

Vchg

Vout

V_0.1 _OUTW

I ClampedCurrent

OUT

I ShortDetected

andLatchedOff

SET

t-time-200 s/divm

1V/div

2V/div

500mV/div

100mV/div

Vin

Viset

Vchg

V_0.1 _OUTW

t-time-1ms/div

2V/div

20mV/div

500mV/div

Vin

Viset

Vchg

V_0.1 _OUTW

ShortDetectedin100mA

modeandLatchedOff

t-time-5ms/div

2V/div

500mV/div

20mV/div

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TYPICAL OPERATIONAL CHARACTERISTICS (continued)

SETUP: bq2409x typical applications schematic; VIN= 5V, V

Figure 7. Battery Removal with fixed TS = 0.5V

PROTECTION CIRCUITS WAVEFORMS

CH4: Iout (1A/Div) Battery voltage swept from 0V to 4.25V to 3.9V.

CH4: Iout (1A/Div)

SLUS968B –JANUARY 2010–REVISED JUNE 2010

= 3.6V (unless otherwise indicated)

BAT

bq24090, bq24091 bq24092, bq24093

Figure 8. Battery Charge Profile Figure 9. ISET Shorted During Normal Operation

CH4: Iout (0.2A/Div) CH4: Iout (0.2A/Div)

Figure 10. ISET Shorted Prior to USB Power-up Figure 11. DPM – Adaptor Current Limits – Vin Regulated

The IC temperature rises to 125°C and enters thermal regulation. Charge current is reduced to regulate the IC at 125°C. VIN is reduced, the IC temperature drops, the charge current returns to the programmed value.

Product Folder Link(s): bq24090 bq24091 bq24092 bq24093

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