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FEATURES 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 2 C (bq27200)
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 capacityAllow 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 fullLines 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 µ A The bqJUNIOR can operate directly from single-cell
– Sleep: < 2.5 µ A Li-Ion and Li-Pol batteries and communicates to the
system over a HDQ one-wire or I 2 C serial interface.– Ship: < 2 µ A (bq27000 only)
– Hibernate: < 1.5 µ A
– 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.