bq27441-G1 Battery Fuel Gauge

By Texas Instruments 250

bq27441-G1 Battery Fuel Gauge

The Texas Instruments' bq27441-G1 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 bq27441-G1 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 requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny 12-pin 2.5 × 4 mm SON package is ideal for space-constrained applications.

Applications include smartphones, feature phones, tablets, digital still and video cameras, handheld terminals, and MP3 or multimedia players.

  • 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)
  • 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
  • Small 12-pin 2.5 × 4 mm SON package