Texas Instruments bq24314DSG, bq24314DSJ, bq24316DSG, bq24316DSJ Schematic

AC Adapter

VDC

GND

1 Fm

1

2

7

5

4

6

8

bq24316DSG

bq24080

ChargerIC

SYSTEM

IN

OUT

VBAT

FAULT

CE

VSS

ILIM

1 Fm

APPLICATIONSCHEMATIC

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OVERVOLTAGE AND OVERCURRENT PROTECTION IC AND

Li+ CHARGER FRONT-END PROTECTION IC

1

FEATURES

2

• Provides Protection for Three Variables:

– Input Overvoltage, with Rapid Response in

< 1 μ s

– User-Programmable Overcurrent with

Current Limiting

– Battery Overvoltage

• 30V Maximum Input Voltage

• Supports up to 1.5A Input Current

• Robust Against False Triggering Due to

Current Transients

• Thermal Shutdown

• Enable Input

• Status Indication – Fault Condition

bq24314 bq24316

SLUS763C – JULY 2007 – REVISED OCTOBER 2007

• Available in Space-Saving Small 8 Lead 2 × 2

SON and 12 Lead 4x3 SON Packages

APPLICATIONS

• Mobile Phones and Smart Phones

• PDAs

• MP3 Players

• Low-Power Handheld Devices

• Bluetooth Headsets

DESCRIPTION

The bq24314 and bq24316 are highly integrated circuits designed to provide protection to Li-ion batteries from failures of the charging circuit. The IC continuously monitors the input voltage, the input current, and the battery voltage. In case of an input overvoltage condition, the IC immediately removes power from the charging circuit by turning off an internal switch. In the case of an overcurrent condition, it limits the system current at the threshold value, and if the overcurrent persists, switches the pass element OFF after a blanking period. Additionally, the IC also monitors its own die temperature and switches off if it becomes too hot. The input overcurrent threshold is user-programmable.

The IC can be controlled by a processor and also provides status information about fault conditions to the host.

1

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.

2 PowerPAD is a trademark of Texas Instruments.

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.

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bq24314 bq24316

SLUS763C – JULY 2007 – REVISED OCTOBER 2007

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.

ORDERING INFORMATION

DEVICE

bq24314DSG 5.85 V 2mm x 2mm SON CBV bq24314DSJ 5.85 V 4mm x 3mm SON CBX bq24316DSG 6.80 V 2mm x 2mm SON CBW bq24316DSJ 6.80 V 4mm x 3mm SON BZC

(1) For the most current package and ordering information, see the

(2) To order a 3000 pcs reel add R to the part number, or to order a 250

(2)

OVP THRESHOLD PACKAGE MARKING

Package Option Addendum at the end of this document, or see the TI website at www.ti.com.

pcs reel add T to the part number.

(1)

PACKAGE DISSIPATION RATINGS

PART NO. PACKAGE R

BQ24314DSG BQ24316DSG

BQ24314DSJ BQ24316DSJ

ABSOLUTE MAXIMUM RATINGS

2 × 2 SON 5 ° C/W 75 ° C/W

4 × 3 SON 5 ° C/W 40 ° C/W

(1)

θ JC

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

PARAMETER PIN VALUE UNIT

IN (with respect to VSS) – 0.3 to 30

Input voltage OUT (with respect to VSS) – 0.3 to 12 V

ILIM, FAULT, CE, VBAT (with respect to VSS) – 0.3 to 7 Input current IN 2.0 A Output current OUT 2.0 A Output sink current FAULT 15 mA Junction temperature, T Storage temperature, T Lead temperature (soldering, 10 seconds) 300 ° C

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

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.

J

STG

– 40 to 150 ° C – 65 to 150 ° C

R

θ JA

RECOMMENDED OPERATING CONDITIONS

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

V

IN

I

IN

I

OUT

R

ILIM

T

J

Input voltage range 3.3 26 V Input current, IN pin 1.5 A Output current, OUT pin 1.5 A OCP Programming resistor 15.0 90.0 k Ω Junction temperature 0 125 ° C

Product Folder Link(s): bq24314 bq24316

MIN MAX UNIT

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SLUS763C – JULY 2007 – REVISED OCTOBER 2007

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

IN

V

UVLO

V

HYS-UVLO

T

DGL(PGOOD)

I

DD

I

STDBY

INPUT TO OUTPUT CHARACTERISTICS

VDO Drop-out voltage IN to OUT CE = Low, VIN= 5V, I

INPUT OVERVOLTAGE PROTECTION

V

OVP

t

PD(OVP)

V

HYS-OVP

t

ON(OVP)

INPUT OVERCURRENT PROTECTION

I

OCP

I

OCP

t

BLANK(OCP)

t

REC(OCP)

BATTERY OVERVOLTAGE PROTECTION

BV

OVP

V

HYS-BOVP

I

VBAT

T

DGL(BOVP)

THERMAL PROTECTION

T

J(OFF)

T

J(OFF-HYS)

LOGIC LEVELS ON CE

V

IL

V

IH

I

IL

I

IH

LOGIC LEVELS ON FAULT

V

OL

I

HI-Z

(1) Not tested in production. Specified by design.

Under-voltage lock-out, input power detected threshold

CE = Low, VINincreasing from 0V to 3V 2.6 2.7 2.8 V

Hysteresis on UVLO CE = Low, VINdecreasing from 3V to 0V 200 260 300 mV Deglitch time, input power CE = Low. Time measured from VIN0V → 5V 1 μ s rise-time,

detected status to output turning ON Operating current 400 600 μ A

CE = Low, No load on OUT pin, VIN= 5V, R

= 25k Ω

ILIM

Standby current CE = High, VIN= 5.0V 65 95 μ A

= 1A 170 280 mV

OUT

Input overvoltage bq24314 5.71 5.85 6.00 V protection CE = Low, VINincreasing from 5V to 7.5V threshold

Input OV propagation delay

bq24316

(1)

CE = Low 1 μ s Hysteresis on OVP CE = Low, VINdecreasing from 7.5V to 5V 25 60 110 mV Recovery time from input CE = Low, Time measured from

overvoltage condition VIN7.5V → 5V, 1 μ s fall-time

Input overcurrent protection threshold range

Input overcurrent protection CE = Low, R threshold

= 25k Ω

ILIM

Blanking time, input overcurrent detected

Recovery time from input overcurrent condition

Battery overvoltage protection CE = Low, VIN> 4.4V threshold

Hysteresis on BV

OVP

DSG V

Input bias current on VBAT pin

Package DSJ V

Package

Deglitch time, battery overvoltage CE = Low, VIN> 4.4V. Time measured from V detected 4.1V to 4.4V to FAULT going low.

CE = Low, VIN> 4.4V 200 275 320 mV

= 4.4V, TJ= 25 ° C

BAT

= 4.4V, TJ= 85 ° C

BAT

rising from

VBAT

Thermal shutdown temperature 140 150 ° C Thermal shutdown hysteresis 20 ° C

Low-level input voltage 0 0.4 V High-level input voltage 1.4 V Low-level input current V High-level input current V

Output low voltage I Leakage current, FAULT pin HI-Z V

= 0V 1 μ A

CE

= 1.8V 15 μ A

CE

= 5mA 0.2 V

SINK

= 5V 10 μ A

FAULT

bq24314 bq24316

8 ms

6.60 6.80 7.00 V

8 ms

300 1500 mA

930 1000 1070 mA

176 μ s

64 ms

4.30 4.35 4.4 V

10

nA

10

176 μ s

Product Folder Link(s): bq24314 bq24316

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OUT

FAULT

VSS

THERMAL

SHUTDOW

CE

COUNTERS,

CONTROL,

AND STATUS

ILIM

VBAT

V

IN

ILIMREF

ILIMREF - Δ

t

BLANK(OCP)

t

DGL(PGOOD)

I

SNS

I

SNS

OFF

t

DGL(BOVP)

ChargePump, Bandgap, BiasGen

Q1

V

BG

V

BG

V

IN

V

BG

OVP

UVLO

V

BG

Currentlimiting loop

OCP comparator

IN

bq24314 bq24316

SLUS763C – JULY 2007 – REVISED OCTOBER 2007

Figure 1. Simplified Block Diagram

Product Folder Link(s): bq24314 bq24316

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NC

VSS

FAULT

IN

OUT

CE

1

2

3

6

8

7

4

5

VBAT

ILIM

bq24314DSG bq24316DSG

FAULT

NC

VSS

CE

3

4

5

8

10

9

6

7

VBAT

ILIM

2

IN

1

NC

12

OUT

11

bq24314DSJ bq24316DSJ

IN

NC

OUT

SLUS763C – JULY 2007 – REVISED OCTOBER 2007

TERMINAL FUNCTIONS

TERMINAL

NAME DSJ DSG

IN VSS. For the 12 pin (DSJ-suffix) device, ensure that pins 1 and 2 are connected together on the

OUT 10, 11 8 O Output terminal to the charging system. Connect external 1 μ F ceramic capacitor (minimum) to VSS. VBAT 8 6 I Battery voltage sense input. Connect to pack positive terminal through a resistor.

ILIM CE 7 5 I Chip enable input. Active low. When CE = High, the input FET is off. Internally pulled down. FAULT 4 4 O VSS 3 2 – Ground terminal NC 5, 6, 12 3

Thermal device. The thermal pad must be connected to the same potential as the VSS pin on the printed PAD circuit board. Do not use the thermal pad as the primary ground input for the device. The VSS pin

1, 2 1 I Input power, connect to external DC supply. Connect external 1 μ F ceramic capacitor (minimum) to

9 7 I/O Input overcurrent threshold programming. Connect a resistor to VSS to set the overcurrent

I/O DESCRIPTION

PCB at the device.

threshold.

Open-drain output, device status. FAULT = Low indicates that the input FET Q1 has been turned off due to input overvoltage, input overcurrent, battery overvoltage, or thermal shutdown.

These pins may have internal circuits used for test purposes. Do not make any external connections at these pins for normal operation.

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

–

must be connected to ground at all times.

bq24314 bq24316

Product Folder Link(s): bq24314 bq24316

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V

IN

V

OUT

I

OUT

V

IN

V

OUT

FAULT

V

IN

V

OUT

FAULT

MaxV =6.84V

OUT

V

IN

V

OUT

MaxV =6.76V

OUT

FAULT

V

IN

V

OUT

MaxV =6.84V

OUT

FAULT

V

IN

V

OUT

MaxV =6.76V

OUT

FAULT

bq24314 bq24316

SLUS763C – JULY 2007 – REVISED OCTOBER 2007

TYPICAL OPERATING PERFORMANCE

Test conditions (unless otherwise noted) for typical operating performance: V R

ILIM

= 25 k Ω , R

= 100 k Ω , TA= 25 ° C, V

BAT

= 3.3V (see Figure 23 for the Typical Application Circuit)

PU

IN

= 5 V, C

= 1 μ F, C

IN

= 1 μ F,

OUT

Figure 2. Normal Power-On Showing Soft-Start, Figure 3. OVP at Power-On, VIN= 0V to 9V, tr= 50 μ s

Figure 4. bq24316 OVP Response for Input Step, VIN= 5V Figure 5. bq24316 OVP Response for Input Step, VIN= 5V

R

= 6.6 Ω

OUT

to 12V, tr= 1 μ s to 12V, tr= 20 μ s

Figure 6. bq24314 OVP Response for Input Step, VIN= 5V Figure 7. bq24314 OVP Response for Input Step, VIN= 5V

to 12V, tr= 1 μ s to 12V, tr= 20 μ s

Product Folder Link(s): bq24314 bq24316

www.ti.com

V

IN

V

OUT

I

OUT

FAULT

V

IN

V

OUT

I

OUT

FAULT

V

IN

V

OUT

I

OUT

FAULT

V

IN

V

OUT

I

OUT

FAULT

V

OUT

V

VBAT

FAULT

V

VBAT

V

OUT

FAULT

Begin soft-stop

t

=220 s

DGL(BAT-OVP)

m

TYPICAL OPERATING PERFORMANCE (continued)

bq24314 bq24316

SLUS763C – JULY 2007 – REVISED OCTOBER 2007

Figure 8. Recovery from OVP, VIN= 7.5V to 5V, tf= 400 μ s Figure 9. OCP, Powering Up into a Short Circuit on OUT

Pin, OCP Counter Counts to 15 Before Switching OFF the

Device

Figure 10. OCP, Zoom-in on the First Cycle of Figure 9 Figure 11. OCP, R

Current Limiting and Soft-Stop

Switches from 6.6 Ω to 3.3 Ω , Shows

OUT

Figure 12. BAT-OVP, V

Shows t

DGL(BAT-OVP)

Steps from 4.2V to 4.4V, Figure 13. BAT-OVP, V

VBAT

and Soft-Stop Shows BAT-OVP Counter

Product Folder Link(s): bq24314 bq24316

Cycles Between 4.1V and 4.4V,

VBAT

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2.4

2.45

2.5

2.55

2.6

2.65

2.7

2.75

-50 -30 -10 10 30 50 70 90 110 130

V Increasing

IN

V Decreasing

IN

Temperature- C°

V ,V -V

UVL

O HYS-UVLO

100

120

140

160

180

200

220

240

260

280

0 50 100 150

V =4V

IN

V

DO

@1A -mV

Temperature- C°

V =5V

IN

6.7

6.72

6.74

6.76

6.78

6.8

6.82

-50 -30 -10 10 30 50 70 90 110 130

V Increasing

IN

V Decreasing

IN

V ,V -V

OVP HYS-OVP

Temperature- C°

5.78

5.8

5.82

5.84

5.86

5.88

-50 -30 -10 10 30 50 70 90

110

130

V Increasing

IN

V Decreasing

IN

Temperature- C°

V ,V -V

OVP HYS-O

VP

0

200

400

600

800

1000

1200

1400

1600

0 10 20 30 40 50 60 70 80 90 100

I -mA

OCP

R -k

ILIM

W

975

976

977

978

979

980

981

982

983

984

985

-50 -30 -10 10 30 50 70 90 110 130

I -mA

OCP

Temperature- C°

bq24314 bq24316

SLUS763C – JULY 2007 – REVISED OCTOBER 2007

TYPICAL OPERATING PERFORMANCE (continued)

UNDERVOLTAGE LOCKOUT DROPOUT VOLTAGE (IN to OUT)

vs vs

FREE-AIR TEMPERATURE FREE-AIR TEMPERATURE

Figure 14. Figure 15.

OVERVOLTAGE THRESHOLD PROTECTION (bq24316) OVERVOLTAGE THRESHOLD PROTECTION (bq24314)

vs vs

FREE-AIR TEMPERATURE FREE-AIR TEMPERATURE

Figure 16. Figure 17.

INPUT OVERCURRENT PROTECTION INPUT OVERCURRENT PROTECTION

vs vs

ILIM RESISTANCE FREE-AIR TEMPERATURE

Figure 18. Figure 19.

Product Folder Link(s): bq24314 bq24316

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4.05

4.1

4.15

4.2

4.25

4.3

4.35

4.4

-50 -30 -10 10 30 50 70 90 110 130

BV (V Increasing)

OVP VBAT

Bat-OVP Recovery(V Decreasing)

VBAT

BV

-V

OVP

Temperature- C°

0

0.5

1

1.5

2

2.5

-50 -30 -10 10 30 50 70 90 110 130

Temperature- C°

I

-nA

VBAT

0

100

200

300

400

500

600

700

800

900

0 5 10 15 20 25 30 35

I ( =Low)

DD

CE

I ( =High)

STDBY

CE

I ,I - A

DD

STDBY

m

V -V

IN

TYPICAL OPERATING PERFORMANCE (continued)

bq24314 bq24316

SLUS763C – JULY 2007 – REVISED OCTOBER 2007

BATTERY OVERVOLTAGE PROTECTION LEAKAGE CURRENT (VBAT Pin)

vs vs

FREE-AIR TEMPERATURE FREE-AIR TEMPERATURE

Figure 20. Figure 21.

SUPPLY CURRENT (bq24314)

vs

INPUT VOLTAGE

Figure 22.

Product Folder Link(s): bq24314 bq24316

Texas Instruments bq24314DSG, bq24314DSJ, bq24316DSG, bq24316DSJ Schematic [ru]

FEATURES

APPLICATIONS

DESCRIPTION

PACKAGE DISSIPATION RATINGS

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED OPERATING CONDITIONS

ELECTRICAL CHARACTERISTICS

TERMINAL FUNCTIONS

TYPICAL OPERATING PERFORMANCE