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FEATURES

APPLICATIONS

DESCRIPTION

POWER FLOW DIAGRAM

(1)

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, bq24032A

bq24035, bq24038

SLUS618F – AUGUST 2004 – REVISED NOVEMBER 2006

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

• 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

• Power Supplement Mode Allows Battery to

integrated

Li-ion

linear

chargers

and

system

power-path

management

devices

targeted

at

Supplement the USB or AC Input Current

space-limited portable applications. The bqTINY

• Autonomous Power Source Selection (AC

III-series offer integrated USB-port and DC supply

Adapter or USB)

(AC

adapter),

power-path

management

with

• Integrated USB Charge Control With

autonomous power-source selection, power FETs

Selectable 100-mA and 500-mA Maximum

and current sensors, high accuracy current and

Input Current Regulation Limits

voltage

regulation,

charge

status,

and

charge

termination, in a single monolithic device.

• Dynamic Total Current Management

for USB

The bqTINY III-series powers the system while

independently charging the battery. This feature

• Supports Up to 2-A Total Current

reduces the charge and discharge cycles on the

• 3.3-V Integrated LDO Output

battery, allows for proper charge termination and

• Thermal Regulation for Charge Control

allows the system to run with an absent or defective

battery pack. This feature also allows for the system

• Charge Status Outputs for LED or System

to instantaneously turn on from an external power

Interface Indicates Charge and Fault

source in the case of a deeply discharged battery

Conditions

pack. The IC design is focused on supplying

• Reverse Current, Short-Circuit, and Thermal

continuous power to the system when available from

Protection

the AC, USB, or battery sources.

• Power Good (AC Adapter and USB Port

Present) Status Outputs

• Charge Voltage Options: 4.1V, 4.2V, or 4.36V

(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

Copyright © 2004–2006, Texas Instruments Incorporated

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.