The Texas Instruments bq27441-G1 fuel gauge is a 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 bq27441-G1 battery 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 bq27441-G1 fuel gauge requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny, 12-pin, 2.50 mm × 4.00 mm, small outline no-lead (SON) package is ideal for space-constrained applications.

• Single Series Cell Li-Ion Battery Fuel Gauge
  • Resides on System Board
  • Supports Embedded or Removable Batteries
  • Powered Directly from Battery with Integrated LDO
  • Supports a Low-Value External Sense Resistor
    (10 mΩ)
• Battery 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