1

FEATURES

APPLICATIONS

DESCRIPTION

AC Adapter

VDC

GND

1 F

m

1

2

7

5

4

6

8

bq24313

bq24315

bq24080

ChargerIC

SYSTEM

IN

OUT

VBAT

FAULT

CE

1 F

m

APPLICATIONSCHEMATIC

bq24313

bq24315

OVERVOLTAGE AND OVERCURRENT PROTECTION IC AND

Li+ CHARGER FRONT-END PROTECTION IC

• 5.5V LDO Mode Voltage Regulation

23

• Provides Protection for Three Variables:

• Available in Space-Saving Small 8 Lead 2mm

×2mm SON

–

Input Overvoltage, with Rapid Response in

< 1

µs

–

User-Programmable Overcurrent with

• Mobile Phones and Smart Phones

Current Limiting

• PDAs

–

Battery Overvoltage

• MP3 Players

• 30V Maximum Input Voltage

• Low-Power Handheld Devices

• Supports up to 1.5A Input Current

• Bluetooth™ Headsets

• Robust Against False Triggering Due to

Current Transients

• Thermal Shutdown

• Enable Input

• Status Indication – Fault Condition

The bq24313 and bq24315 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

the overvoltage threshold. If an input overvoltage condition occurs, 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 exceeds 140°C. 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.

3

Bluetooth is a trademark of Bluetooth SIG, Inc.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008, 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.