1

FEATURES

DESCRIPTION

APPLICATIONS

IN

STAT1

CE

6

STAT2

V

SS

ISET

PG

TMR

BAT

bq24085

10

9

8

7

5

1

2

3

4

OUT

IN

STAT 1

CE

OUT

Li-IonorLi-Pol

BatteryPack

+

Pack-

Pack+

STAT 2

Vss

ISET

PG

RED

GREEN

RSET

TMR

1

2

3

4

5

6

7

8

9

10

BAT

ChargeEnable

andPowerGood

InputPower

R2

1.5kW

R1

1.5kW

bq24085

1 F

m

C2

49.9kW

1.13kW

C3

4.7 F

m

bq24085, bq24086

bq24087, bq24088

750 mA SINGLE-CHIP Li-Ion/Li-Pol CHARGE MANAGEMENT IC

WITH THERMAL REGULATION

• Ideal for Low-Dropout Designs for Single-Cell

Li-Ion or Li-Pol Packs in Space Limited

The bq24085/6/7/8 series are highly integrated Li-Ion

Applications

and Li-Pol linear chargers, targeted at space-limited

portable applications. The bq24085/6/7/8 series offers

• Integrated Power FET and Current Sensor for

a variety of safety features and functional options,

up to 750-mA Charge Applications

while still implementing a complete charging system

• Reverse Leakage Protection Prevents Battery

in a small package. The battery is charged in three

Drainage

phases: conditioning, constant or thermally regulated

• ±0.5% Voltage Regulation Accuracy

current, and constant voltage. Charge is terminated

based

on

minimum

current.

An

internal

• Thermal Regulation Maximizes Charge Rate

programmable charge timer provides a backup safety

• Charge Termination by Minimum Current and

feature for charge termination and is dynamically

Time

adjusted during the thermal regulation phase. The

• Precharge Conditioning With Safety Timer

bq24085/6/7/8 automatically restarts the charge if the

battery voltage falls below an internal threshold; sleep

• Status Outputs for LED or System Interface

mode is set when the external input supply is

Indicate Charge, Fault, and Power Good

removed. Multiple versions of this device family

Outputs

enable easy design of the bq24085/6/7/8 in cradle

• Short-Circuit and Thermal Protection

chargers or in the end equipment, while using low

cost or high-end AC adapters.

• Automatic Sleep Mode for Low Power

Consumption

Pin Out

• Small 3×3 mm MLP Package

(Top View)

• Selectable Battery Insertion and Battery

Absent Detection

• Input Overvoltage Protection

–

6.5 V and 10.5 V Options

• PDA, MP3 Players, Digital Cameras

• Internet Appliances and Handheld Devices

TYPICAL APPLICATION CIRCUIT

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 © 2007–2008, 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.