1 F

m

1 F

m

1kW

1.5kW

1.5kW

2kW

Disconnect after Detection

+

Battery Pack

VBUS

GND

D+

D-

USB Port

DC+

GND

Adaptor

VDD

D-

D+

GND

TTDM

Host

System Load

OR

ISET/100/500mA

1

2

3

4

5

10

9

8

7

6

IN

ISET

VSS

PRETERM

PG

NC

ISET2

CHG

TS

OUT

bq2409x

+

bq24090, bq24091

bq24092, bq24093

www.ti.com

SLUS968B – JANUARY 2010 – REVISED JUNE 2010

1A, Single-Input, Single Cell Li-Ion Battery Charger

Check for Samples: bq24090, bq24091, bq24092, bq24093

1

FEATURES

APPLICATIONS

•

Smart Phones

•

CHARGING

•

PDAs

–

1% Charge Voltage Accuracy

•

MP3 Players

–

10% Charge Current Accuracy

•

Low-Power Handheld Devices

–

Pin Selectable USB 100mA and 500mA

Maximum Input Current Limit

DESCRIPTION

–

Programmable Termination and Precharge

The bq2409x series of devices are highly integrated

Threshold

Li-ion

linear

chargers

devices

targeted

at

•

PROTECTION

space-limited

portable

applications.

The

devices

–

6.6V Over-Voltage Protection

operate from either a USB port or AC adapter. The

high input voltage range with input overvoltage

–

Input Voltage Dynamic Power Management

protection supports low-cost unregulated adapters.

–

125°C Thermal Regulation; 150°C Thermal

Shutdown Protection

The bq2409x has a single power output that charges

the battery. A system load can be placed in parallel

–

OUT Short-Circuit Protection and ISET

with the battery as long as the average system load

Short Detection

does not keep the battery from charging fully during

–

Operation Over JEITA Range via Battery

the 10 hour safety timer.

NTC – ½ Fast-Charge-Current at Cold,

The battery is charged in three phases: conditioning,

4.06V at Hot, bq24092/3

constant current and constant voltage. In all charge

–

Fixed 10 Hour Safety Timer

phases, an internal control loop monitors the IC

•

SYSTEM

junction temperature and reduces the charge current

if an internal temperature threshold is exceeded.

–

Automatic Termination and Timer Disable

Mode (TTDM) for Absent Battery Pack With

Thermistor

–

Status Indication – Charging/Done

–

Available in Small 10-Pin MSOP Package

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 © 2010, 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.