1

FEATURES

APPLICATIONS

DESCRIPTION

AC Adapter

VDC

GND

1 F

m

1

2

7

5

4

6

8

bq24316DSG

bq24080

ChargerIC

SYSTEM

IN

OUT

VBAT

FAULT

CE

1 F

m

APPLICATIONSCHEMATIC

bq24314

bq24316

SLUS763C – JULY 2007 – REVISED OCTOBER 2007

www.ti.com

OVERVOLTAGE AND OVERCURRENT PROTECTION IC AND

Li+ CHARGER FRONT-END PROTECTION IC

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

SON and 12 Lead 4x3 SON Packages

2

• Provides Protection for Three Variables:

–

Input Overvoltage, with Rapid Response in

< 1

μs

• Mobile Phones and Smart Phones

–

User-Programmable Overcurrent with

• PDAs

Current Limiting

• MP3 Players

–

Battery Overvoltage

• Low-Power Handheld Devices

• 30V Maximum Input Voltage

• Bluetooth Headsets

• Supports up to 1.5A Input Current

• Robust Against False Triggering Due to

Current Transients

• Thermal Shutdown

• Enable Input

• Status Indication – Fault Condition

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.

Copyright © 2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.