Product details


Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface I2C Battery capacity (Min) (mAh) 100 Battery capacity (Max) (mAh) 4000 Implementation System External capacity indication None Features Impedance Track™ algorithm Operating temperature range (C) -40 to 85 Cell balancing open-in-new Find other Battery fuel gauges

Package | Pins | Size

DSBGA (YZF) 15 5 mm² 2.73 x 1.79 open-in-new Find other Battery fuel gauges


  • Battery Fuel Gauge for 1-Series LiCoO2 battery Applications
  • Easy to Configure Battery Fuel Gauging Based on Patented Impedance Track Technology
    • Models Battery Discharge Curve for Accurate State-of-Charge Report
    • Automatically Adjusts for Battery Aging, Battery Self-Discharge, and
      Temperature/Rate Inefficiencies
    • Low-Value Integrated Sense Resistor
      (10 mΩ typical)
  • Resides on System Main Board
    • Works with Embedded or Removable Battery Packs
    • Integrated LDO allows devices to be powered directly from battery pack
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging
    • Internal Temperature Sensor for Battery Temperature Reporting
    • Configurable Level of State-of-Charge (SOC) Interrupts
  • I2C for Connection to System Microcontroller Port
  • Small 15-pin 2,69 × 1,75 mm, 0.5 mm pitch CSP package
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The Texas Instruments bq27425 system-side LiCoO2 battery fuel gauge is an easy to configure microcontroller peripheral that provides fuel gauging for single-cell LiCoO2 battery packs. The device requires minimal user configurations and system microcontroller firmware development for accurate fuel gauging.

The bq27425 uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), and battery voltage (mV).

Battery fuel gauging with the bq27425 requires only PACK+ (P+), PACK– (P–), for a removable battery pack or embedded battery circuit. The 15-pin 2,69 × 1,75 mm, 0.5 mm pitch CSP package is ideal for space constrained applications.

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Technical documentation

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Type Title Date
* Data sheet System-Side Impedance Track™ Fuel Gauge With Direct Battery Connection . datasheet Mar. 04, 2011
User guide bq27425 EVM: Single-Cell Impedance Track Technology (Rev. A) Jan. 18, 2013
Application note bq27425-G1 to bq27425-Gx Change List Oct. 19, 2012
Application note Configuring the bq27425G1-v2.02 Aug. 28, 2012
Application note Going to Production With the bq27425 Apr. 23, 2012

Design & development

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

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


SLUC261HY.ZIP (496964 KB)
SLUC313A.ZIP (6373 KB)

Design tools & simulation

SLUC138DJ.ZIP (6840 KB)

Reference designs

System-side Impedance Track™ fuel (gas) gauge reference design
TIDA-00051 This reference design includes one bq27425-G2B circuit module with an integrated current-sense resistor. A separated orderable, EV2300 or EV2400 PC interface board for gas gauge interface along with a PC USB cable, and Windows™-based PC software, is needed when using this design. The circuit (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
DSBGA (YZF) 15 View options

Ordering & quality

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