The BQ27421YZFT-G1A is a system-side Fuel Gauge with integrated sense resistor. It is a minimally configured microcontroller peripheral that provides system-side fuel gauging for single-cell Li-ion batteries. The device requires very little user configuration and system microcontroller firmware development. The BQ27421-G1 fuel gauge uses the patented Impedance TrackTM 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 fuel gauge requires connections only to PACK+ (P+) and PACK- (P-) for a removable battery pack or embedded battery circuit.
● Single-cell Li-ion battery fuel gauge
● Resides on system board Supports embedded or removable batteries
● Powered directly from battery with integrated LDO
● Easy-to-configure fuel gauging based on patented Impedance Track™ Technology
● Automatically adjusts for battery aging, self-discharge, temperature and rate changes
● Battery state-of-health (Aging) estimation
● 400kHz I²C Serial interface
● Configurable SOC interrupt or battery low digital output warning
● Internal temperature sensor or host-reported temperature
● Green product and no Sb/Br
