Texas Instruments bq27421-G1 fuel gauge 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 bq27421-G1 fuel gauge requires connections only to PACK+
(P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny 9-ball, 1.62
mm × 1.58 mm, 0.5-mm pitch NanoFree™ chip scale package (DSBGA) is
ideal for space-constrained applications.
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