SW

SYS

BAT

DRV

PGND

BYP

/CE

BOOT

HOST

PMID

IN

System

Load

TEMP

PACK+

PACK–

VBUS

D+

D–

GND

CD

/PG

/CHG

TS

ILIM

ISET

VDPM

+

DRV_S

DRV_S

bq24278

www.ti.com

SLUSB04 – JUNE 2012

2.5A, Single Input, Single Cell Switchmode Li-Ion BATTERY CHARGER with Power Path

Management

Check for Samples: bq24278

1

FEATURES

•

Thermal Regulation Protection for Output

Current Control

•

High-Efficiency Switch Mode Charger with

•

Low Battery Leakage Current, BAT Short-

Separate Power Path Control

Circuit Protection

–

Instantly Startup System from a Deeply

•

Soft-Start feature to reduce inrush current

Discharged Battery or No Battery

•

Thermal Shutdown and Protection

•

20V input rating, with 10.5V Over-Voltage

Protection (OVP)

•

Available in small 49-ball WCSP or QFN-24

packages

•

Integrated FETs for Up to 2.5A Charge Rate

•

Highly Integrated Battery N-Channel MOSFET

APPLICATIONS

Controller for Power Path Management

•

Handheld Products

•

Safe and accurate Battery Management

Functions

•

Portable Media Players

–

0.5% Battery Regulation Accuracy

•

Portable Equipment

–

10% Charge Current Accuracy

•

Netbook and Portable Internet Devices

•

Voltage-based, NTC Monitoring Input (TS)

–

Standard Temp Range

APPLICATION SCHEMATIC

DESCRIPTION

The bq24278 highly integrated single cell Li-Ion battery charger and system power path management device

targeted for space-limited, portable applications with high capacity batteries. The single cell charger operates

from a dedicated charging source such as an AC adapter or Wireless Power.

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2012, 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.