BQ27425-G2B System-Side Impedance Track™ Fuel Gauge | Gas Gauge Battery | TI.com

BQ27425-G2B
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System-Side Impedance Track™ Fuel Gauge | Gas Gauge Battery

 

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.

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

Parametrics

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Part number Order Number of series cells Cell chemistry Battery capacity (Max) (mAh) Communication interface Battery capacity (Min) (mAh) External capacity indication Implementation Gas gauge algorithm Cell balancing Features Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
BQ27425-G2B Order now Single Cell     Li-Ion/Li-Polymer     4000     I2C     100     None     System     Impedance Track             -40 to 85     DSBGA | 15     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)    
BQ27421-G1 Order now Single Cell     Li-Ion/Li-Polymer     8000     I2C     100     None     System     Impedance Track         Integrated Sense Resistor     -40 to 85     DSBGA | 9     9DSBGA: 3 mm2: 1.75 x 1.75 (DSBGA | 9)    
BQ27425-G2A Order now Single Cell     Li-Ion/Li-Polymer     4000     I2C     100     None     System     Impedance Track             -40 to 85     DSBGA | 15     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)