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Product details

Parameters

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 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

Features

  • Single-Series Cell Li-Ion Battery Fuel Gauge
    • Resides on System Board
    • Supports Embedded or Removable Batteries
    • Powered Directly From Battery With Integrated
      LDO
    • Low-Value Integrated Sense Resistor
      (10 mΩ, Typical)
  • Easy-to-Configure Fuel Gauging Based on
    Patented Impedance Track Technology
    • Reports Remaining Capacity and State of
      Charge (SOC) With Smoothing Filter
    • Automatically Adjusts for Battery Aging, Self-
      Discharge, Temperature, and Rate Changes
    • Battery State-of-Health (Aging) Estimation
  • Microcontroller Peripheral Supports:
    • 400-kHz I2C Serial Interface
    • Configurable SOC Interrupt or
      Battery Low Digital Output Warning
    • Internal Temperature Sensor or
      Host-Reported Temperature
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Description

The Texas Instruments bq27425-G2 fuel gauge is an easy-to-configure microcontroller peripheral that provides system-side fuel gauging for single-cell Li-Ion batteries. The device requires minimal user configuration and system microcontroller firmware development.

The fuel gauge 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-G2 fuel gauge requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The 15-pin, 2.69 mm × 1.75 mm, 0.5-mm pitch chip scale package (DSBGA) is ideal for space-constrained applications.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet bq27425-G2 System-Side Impedance Track Fuel Gauge With Integrated Sense Resistor datasheet (Rev. B) Jun. 30, 2015
Application notes bq27425-G1 to bq27425-Gx Change List Oct. 19, 2012
Application notes Going to Production With the bq27425 Apr. 23, 2012
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 Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm Jan. 31, 2008

Design & development

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

Hardware development

EVALUATION BOARDS Download
Description

The BQ27425EVM-G2B evaluation module is a complete evaluation system for the bq27425-G2B. The EVM includes one bq27425-G2B circuit module with an integrated current-sense resistor. A separated orderable EV2400 PC interface board for gas gauge interface along with a PC USB cable, and (...)

Features
  • Single series cell Li-Ion battery fuel gauge
    • Resides on system board
    • Supports embedded or removable batteries
    • Powered directly from battery with integrated LDO
    • Low-value integrated sense resistor (10 mΩ Typical)
  • Easy to configure fuel gauging based on patented Impedance Track technology
    • Reports Remaining (...)

Software development

APPLICATION SOFTWARE & FRAMEWORKS Download
Battery Management Studio (bqStudio) Software
BQSTUDIO Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including (...)
Features
  • Real-time Gauge Dashboard for monitoring basic registers
  • Full register access and logging
  • Full data memory access and logging
  • Product configuration and monitoring tools
  • Import and export of product configurations
  • Calibration and test automation
  • Export of FS files for the target production environment 
SUPPORT SOFTWARE Download
SLUC400A.ZIP (7307 KB)

CAD/CAE symbols

Package Pins Download
DSBGA (YZF) 15 View options

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