BQ27425-G2B

• 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

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.