FEATURES
APPLICATIONS
DESCRIPTION
bq27010 , bq27210
SLUS707B – APRIL 2006 – REVISED JANUARY 2007
Li-Ion AND Li-Pol BATTERY GAS GAUGE IC FOR PORTABLE APPLICATIONS
(bqJUNIOR)
– Ship: < 2 µA (bq27010 only)
• HDQ (bq27010) or I
2
C (bq27210) – Hibernate: < 1.5 µA
Communication
– Data Retention: < 20 nA
• Reports Accurate Time-to-Empty At Both
Measured and Host-Requested Load Values
• PDA
• Reports Available Capacity Compensated for
Discharge Rate, Temperature, and Age
• Smart Phones
• MP3 Players
• End-of-Discharge Voltage Compensated for
Discharge Rate and Temperature
• Digital Cameras
• Internet Appliances
• Automatic Capacity Reduction with Age
• Handheld Devices
• Reports Temperature, Voltage, and Current
• High Accuracy Charge and Discharge Current
Integration with Automatic Offset Calibration
The bqJUNIOR™ series are highly accurate
• Requires No User Calibration
stand-alone single-cell Li-Ion and Li-Pol battery
• Programmable Input/Output Port
capacity monitoring and reporting devices targeted at
• Internal User EEPROM Configuration Memory
space-limited, portable applications. The IC monitors
a voltage drop across a small current sense resistor
• Uploadable Coefficients Allows Host-Side Use
connected in series with the battery to determine
with Multiple Pack Characteristics
charge and discharge activity of the battery.
• Stable Oscillator Without External
Compensations for battery age, temperature,
Components
self-discharge, and discharge rate are applied to the
• Dynamic End-of-Discharge Detection Delay to
capacity measurments to provide available
Allow Use in a High-Dynamic Load
time-to-empty information across a wide range of
Environment operating conditions. Battery capacity is
automatically recalibrated, or learned, in the course
• Automatic Sleep Mode When Communication
of a discharge cycle from full to empty. Internal
Lines are Low
registers include current, capacity, time-to-empty,
• Available in a Small 3 mm x 4 mm QFN
state-of-charge, cell temperature and voltage, status,
Package
and more.
• Five Low-Power Operating Modes
The bqJUNIOR can operate directly from single-cell
– Active: < 90 µA
Li-Ion and Li-Pol batteries and communicates to the
system over a HDQ one-wire or I
2
C serial interface.
– Sleep: < 2.5 µA
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 © 2006–2007, 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.
