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FEATURES

DESCRIPTION

APPLICATIONS

TYPICAL APPLICATION

AC

USB

BAT

OUT

bq2403x

PACK+

PACK−

System

VDC

GND

VBUS

GND

D+

D −

USB Port

AC Adapter

+

Q1

Q2

Q3

UDG−04082

30 m

Ω

bq24030, bq24032, bq24035

SLUS618 – AUGUST 2004

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

•

Small 3.5 mm

× 4.5 mm QFN package

The bqTINY-III series are highly integrated and flex-

ible Li-Ion linear charge and system power path

•

Designed for single-cell Li-Ion or Li-Pol based

management devices targeted at space limited port-

portable applications

able applications. The bqTINY-III series offer inte-

•

Integrated dynamic power-path management

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

(DPPM) feature allowing the AC adapter or the

power-path

management

with

autonomous

USB port to simultaneously power the system

power-source selection, power FET and current

and charge the battery

sensor, high accuracy current and voltage regulation,

charge status, and charge termination, in a single

•

Power supplement mode allows battery to

monolithic device.

supplement the USB or AC input current

•

Autonomous power source selection (AC

The bqTINY-III powers the system while indepen-

Adapter or USB)

dently charging the battery. This features reduces the

charge and discharge cycles on the battery, allows

•

Integrated USB charge control with selectable

for proper charge termination and allows the system

100-mA and 500-mA charge rates

to run with an absent or defective battery pack. This

•

Dynamic total current management for USB

feature also allows for system to instantaneously turn

on from an external power source in the case of a

•

Supports up to 2-A total current

deeply discharged battery pack.

•

3.3 V Integrated LDO output

The bqTINY-III automatically selects the USB-Port or

•

Thermal regulation for charge control

the AC-adapter as the power source for the system.

•

Charge status outputs for LED or system

In the USB configuration, the host can select from the

interface indicates charge and fault

2 preset charge rates of 100 mA and 500 mA. The

conditions

bqTINY-III dynamically adjusts the USB charge rate

•

Reverse current, short-circuit and thermal

based on system load to stay within the 100 mA or

protection

500 mA charge rates. In the ac-adapter configuration

an external resistor sets the magnitude of the charge

•

Power Good (AC adapter and USB port

current. The AC input can also be programmed using

present) Status outputs

the PSEL pin to perform like a USB input.

•

Smartphones and PDA

•

MP3 players

•

Digital cameras Handheld devices

•

Internet appliances

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 © 2004, 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.