Product details


Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface I2C Battery capacity (Min) (mAh) 300 Battery capacity (Max) (mAh) 6000 Implementation Pack External capacity indication None Operating temperature range (C) -20 to 70 open-in-new Find other Battery fuel gauges

Package | Pins | Size

VSON (DRK) 10 12 mm² 4 x 3 open-in-new Find other Battery fuel gauges


  • HDQ (bq27010) or I2C (bq27210) Communication
  • Reports Accurate Time-to-Empty At Both Measured and Host-Requested Load Values
  • Reports Available Capacity Compensated for Discharge Rate, Temperature, and Age
  • End-of-Discharge Voltage Compensated for Discharge Rate and Temperature
  • Automatic Capacity Reduction with Age
  • 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
  • Uploadable Coefficients Allows Host-Side Use with Multiple Pack Characteristics
  • 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
    • Active: < 90 µA
    • Sleep: < 2.5 µA
    • Ship: < 2 µA (bq27010 only)
    • Hibernate: < 1.5 µA
    • Data Retention: < 20 nA
    • PDA
    • Smart Phones
    • MP3 Players
    • Digital Cameras
    • Internet Appliances
    • Handheld Devices

bqJUNIOR is a trademark of Texas Instruments.

open-in-new Find other Battery fuel gauges


The bqJUNIOR™ 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 age, 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 I2C serial interface.

open-in-new Find other Battery fuel gauges

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 12
Type Title Date
* Datasheet Li-Ion and Li-Pol Battery Gas Gauge IC for Portable Apps (bqJUNIOR) datasheet (Rev. B) Jan. 16, 2007
User guides bq27x10EVM Single Cell Battery Fuel Gauge Evaluation Module (Rev. A) Oct. 04, 2013
Application notes Feature Set Comparison of bq27x00, bq27x10, bq27500, and bq27510 (Rev. A) Dec. 02, 2008
Application notes ESD and RF Mitigation in Handheld Battery Pack Electronics Mar. 06, 2008
Application notes Single Cell Gas Gauge Circuit Design Feb. 22, 2008
Application notes Single Cell Impedance Track Printed-Circuit Board Layout Feb. 22, 2008
Application notes Host-Side Gas-Gauge-System Design Considerations for Single-Cell Handheld Apps Oct. 12, 2007
Application notes Transition From Prior bqJunior Gauges to the bq27x10 Jul. 17, 2007
Application notes Configuring the bq27010/210 for Gas Gauge Applications Feb. 23, 2007
Application notes Multicell Li-Ion and Li-Pol Battery Gas-Gauge Application Using the bqJunior May 26, 2006
Application notes Using the bq27x00 With a Primary Cell Battery Dec. 15, 2005
Application notes Building a Superior Battery Monitor with the bq27x00 Jun. 20, 2005

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The bq27x10EVM includes one bq27x10EVM circuit module. The circuit module includes one bq27x10, a current sense resistor, and all other components onboard necessary to calculate remaining battery capacity and predict system run-time to empty. The circuit module connects directly across the cell in a (...)

  • Complete evaluation system for the bq27x10 battery gas gauge
  • Populated circuit module for quick setup
  • PC software and interface board for easy evaluation
  • Software allows EEPROM programming and data logging for system analysis

Software development

Linux Driver for BQ27XXX
BQ27XXXSW-LINUX The Linux driver supports the BQ27x series of Battery Fuel Gauges. The Linux driver supports communication through the I2C/HDQ bus and interfaces with the power supply sub-system to monitor battery properties.


Linux Mainline Status

Available in Linux Main line: Yes
Available through N/A


SLUC078.ZIP (2289 KB)
SLUC087.ZIP (2431 KB)

CAD/CAE symbols

Package Pins Download
VSON (DRK) 10 View options

Ordering & quality

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​


Related videos