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