BQ27200DRKR.

The BQ27200DRKR is a stand-alone highly accurate single-cell Li-ion and Li-pol battery gas gauge Integrated Circuit with I?C interface targeted at space-limited, portable applications. The IC monitors a voltage drop across a small current sense resistor connected in series with the battery to determine charge and discharge activity of the battery. Compensations for battery temperature, self-discharge and discharge rate are applied to the capacity measurements to provide available time-to-empty information across a wide range of operating conditions. Battery capacity is automatically recalibrated or learned, in the course of a discharge cycle from full to empty. Internal registers include current, capacity, time-to-empty, state-of-charge, cell temperature and voltage, status and more.