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HDQ (bq27000) or I

2

C (bq27200)

Communication

Reports Accurate

Time-to-Empty

With

Measured Load and Historical Maximum and

Standby Loads

Reports Temperature, Voltage, and Current

High Accuracy Charge and Discharge Current

Integration with Automatic Offset Calibration

Requires No User Calibration

Programmable Input/Output Port

Internal User EEPROM Configuration Memory

Automatic Capacity Reduction With Age

Stable Oscillator Without External

Components

Dynamic End-of-Discharge Detection Delay to

Allow Use in a High-Dynamic Load

Environment

Automatic Sleep Mode When Communication

Lines are Low

Available in a Small 3 mm x 4 mm QFN

Package

Five Low-Power Operating Modes

鈥?Active: < 90 碌A(chǔ)

鈥?Sleep: < 2.5 碌A(chǔ)

鈥?Ship: < 2 碌A(chǔ) (bq27000 only)

鈥?Hibernate: < 1.5 碌A(chǔ)

鈥?Data Retention: < 20 nA

APPLICATIONS

鈥?/div>

PDA

Smart Phones

MP3 Players

Digital Cameras

Internet Appliances

Handheld Devices

鈥?/div>

DESCRIPTION

The bqJUNIOR鈩?series are highly accurate

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

capacity monitoring and reporting devices targeted at

space-limited, portable applications. The IC monitors

a voltage drop across a small current sense resistor

connected in series with the battery to determine

charge and discharge activity of the battery.

Compensations

for

battery

temperature,

self-discharge, and discharge rate are applied to the

capacity

measurments

to

provide

available

time-to-empty information across a wide range of

operating conditions. Battery capacity is automatically

recalibrated, or learned, in the course of a discharge

cycle from full to empty. Internal registers include

current, capacity, time-to-empty, state-of-charge, cell

temperature and voltage, status, and more.

The bqJUNIOR can operate directly from single-cell

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

system over a HDQ one-wire or I

2

C serial interface.

鈥?/div>

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.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

型號(hào)

版本

描述

廠商

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