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FEATURES

APPLICATIONS

DESCRIPTION

AC

USB

BAT

OUT

bq2403x

PACK+

PACK−

System

VDC

GND

VBUS

GND

D+

D −

USB Port

AC Adapter

+

Q1

Q2

Q3

UDG−04082

40 m

Ω

(2)

bq24030, bq24031, bq24032,

bq24032A, bq24035, bq24038, bq24039

SLUS618C – AUGUST 2004 – REVISED JUNE 2005

SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC (bqTINY™-III)

•

Smart Phones and PDA

•

Small 3,5 mm × 4,5 mm QFN Package

•

MP3 Players

•

Designed for Single-Cell Li-Ion- or

•

Digital Cameras Handheld Devices

Li-Polymer-Based Portable Applications

•

Internet Appliances

•

Integrated Dynamic Power-Path Management

(DPPM) Feature Allowing the AC Adapter or

the USB Port to Simultaneously Power the

System and Charge the Battery

The bqTINY™-III series of devices are highly inte-

•

Power Supplement Mode Allows Battery to

grated Li-ion linear chargers and system power-path

management devices targeted at space-limited port-

Supplement the USB or AC Input Current

able applications. The bqTINY-III series offer inte-

•

Autonomous Power Source Selection (AC

grated USB-port and DC supply (AC adapter),

Adapter or USB)

power-path

management

with

autonomous

•

Integrated USB Charge Control With

power-source selection, power FETs and current

Selectable 100-mA and 500-mA Maximum

sensors, high accuracy current and voltage regu-

Input Current Regulation Limits

lation, charge status, and charge termination, in a

single monolithic device.

•

USB High Current Regulation Limit, 1 A Max

(bq24039 Only)

The bqTINY-III powers the system while indepen-

dently charging the battery. This feature reduces the

•

Dynamic Total Current Management

charge and discharge cycles on the battery, allows

for USB

for proper charge termination and allows the system

•

Supports Up to 2-A Total Current

to run with an absent or defective battery pack. This

•

3.3-V Integrated LDO Output

feature also allows for the system to instantaneously

turn on from an external power source in the case of

•

Thermal Regulation for Charge Control

a deeply discharged battery pack. The IC design is

•

Charge Status Outputs for LED or System

focused on supplying continuous power to the system

Interface Indicates Charge and Fault

when available from the AC, USB, or battery sources.

Conditions

•

Reverse Current, Short-Circuit, and Thermal

Protection

•

Power Good (AC Adapter and USB Port

Present) Status Outputs

•

Charge Voltage Options: 4.2 V or 4.36 V

(1)

See Figure 2 and functional block diagram for more detailed feature information.

(2)

P-FET back gate body diodes are disconnected to prevent body diode conduction.

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.

bqTINY is a trademark of Texas Instruments.

UNLESS OTHERWISE NOTED this document contains PRO-

Copyright © 2004–2005, Texas Instruments Incorporated

DUCTION DATA information current as of publication date. Prod-

ucts conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily

include testing of all parameters.