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APPLICATIONS

DESCRIPTION

bq27000, bq27200

SLUS556B – SEPTEMBER 2004 – REVISED NOVEMBER 2004

SINGLE CELL Li-Ion AND Li-Pol BATTERY GAS GAUGE IC FOR PORTABLE

APPLICATIONS (bqJUNIOR™)

•

PDA

•

HDQ (bq27000) or I

Communication

•

Smart Phones

•

MP3 Players

•

Reports Accurate Time-to-Empty With

Measured Load and Historical Maximum and

•

Digital Cameras

Standby Loads

•

Internet Appliances

•

Reports Temperature, Voltage, and Current

•

Handheld Devices

•

High Accuracy Charge and Discharge Current

Integration with Automatic Offset Calibration

•

Requires No User Calibration

The

bqJUNIOR

series

are

highly

accurate

stand-alone single-cell Li-Ion and Li-Pol battery ca-

•

Programmable Input/Output Port

pacity monitoring and reporting devices targeted at

•

Internal User EEPROM Configuration Memory

space-limited, portable applications. The IC monitors

•

Automatic Capacity Reduction With Age

a voltage drop across a small current sense resistor

connected in series with the battery to determine

•

Stable Oscillator Without External

charge and discharge activity of the battery. Compen-

Components

sations for battery temperature, self-discharge, and

•

Dynamic End-of-Discharge Detection Delay to

discharge

rate

are

applied

to

the

capacity

Allow Use in a High-Dynamic Load

measurments to provide available time-to-empty in-

Environment

formation across a wide range of operating con-

•

Automatic Sleep Mode When Communication

ditions. Battery capacity is automatically recalibrated,

or learned, in the course of a discharge cycle from full

Lines are Low

to empty. Internal registers include current, capacity,

•

Small 3 mm x 4 mm QFN Package

time-to-empty, state-of-charge, cell temperature and

•

Five Low-Power Operating Modes

voltage, status, and more.

– Active: < 90 µA

The bqJUNIOR can operate directly from single-cell

– Sleep: < 2.5 µA

Li-Ion and Li-Pol batteries and communicates to the

system over a HDQ one-wire or I

– Ship: < 2 µA (bq27000 only)

– Hibernate: < 1.5 µA

– Data Retention: < 20 nA

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.

bqJUNIOR is a trademark of Texas Instruments.

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.