The Texas Instruments bq27742-G1 is a fuel gauge for single-cell Li-Ion battery packs
that uses patented Impedance Track™ technology to deliver rate-,
temperature-, and aging-compensated predictions of remaining battery capacity and system runtime
with highest accuracy. The device also includes a fully integrated high-side protector that
eliminates the need for a separate Li-Ion protection circuit and provides a full suite of
high-accuracy fault detections for overvoltage, undervoltage, overcurrent in charge, overcurrent in
discharge, and short-circuit in discharge conditions. The hardware protection functions offer
built-in data flash-based programmability, allowing simple reconfiguration of existing devices for
varying end equipment needs.
The fuel gauge provides information such as remaining battery capacity (mAh),
state-of-charge (%), runtime to empty (minutes), voltage (mV), current (mA), and temperature (°C),
as well as recording vital parameters throughout the lifetime of the battery. The device also
supports interrupts to the host to indicate detection of a variety of important battery conditions
to the system.
The DSBGA is a 15-ball package (2.78 mm × 1.96 mm) that is ideal for