IN

VSS

BAT

DC

GND

Adaptor

bq24075T

bq24079T

OUT

EN2

TS

TEMP

PACK-

SYSTEM

SYSOFF

System

ON /OFF

Control

13

8

15

1

2

3

5

10

11

1mF

4.7 mF

4.7 mF

1 kW

1.18 kW

1 kW

10 kW

1.13 kW

13 kW

VIN

PACK+

bq24075T

bq24079T

www.ti.com

SLUS937 – DECEMBER 2009

1.5A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC

Check for Samples: bq24075T, bq24079T

1

FEATURES

Current

•

Fully Compliant USB Charger

•

Status Indication – Charging/Done, Power

Good

•

Selectable 100mA and 500mA Maximum Input

Current

•

Small 3 mm × 3 mm 16 Lead QFN Package

•

100mA Maximum Current Limit Ensures

APPLICATIONS

Compliance to USB-IF Standard

•

Smart Phones

•

Input based Dynamic Power Management

•

PDAs

(VIN-DPM) for Protection Against Poor USB

•

MP3 Players

Sources

•

Low-Power Handheld Devices

•

28V Input Rating with Overvoltage Protection

•

Integrated Dynamic Power Path Management

DESCRIPTION

(DPPM) Function Simultaneously and

Independently Powers the System and

The bq2407xT series of devices are integrated Li-ion

Charges the Battery

linear chargers and system power path management

devices

targeted

at

space-limited

portable

•

Supports up to 1.5A Charge Current with

applications. The devices operate from either a USB

Current Monitoring Output (ISET)

port or AC adapter and support charge currents up to

•

Programmable Input Current Limit up to 1.5A

1.5A. The input voltage range with input overvoltage

for Wall Adapters

protection supports unregulated adapters. The USB

input current limit accuracy and start up sequence

•

Battery Disconnect Function with SYSOFF

allow the bq2407xT to meet USB-IF inrush current

Input

specification. Additionally, the input dynamic power

•

Reverse Current, Short-Circuit and Thermal

Protection

crashing

incorrectly

configure

USB

sources.

•

Flexible Voltage Based NTC Thermistor Input

(Description continued on next page)

•

Proprietary Start Up Sequence Limits Inrush

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 © 2009, 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.