The BQ27210DRKR is a highly accurate stand-alone single-cell Li-ion and Li-polymer Battery Capacity Monitoring and Reporting Device 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 age, 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. The bqJUNIOR can operate directly from single-cell Li-ion and Li-polymer batteries and communicates to the system over a HDQ one-wire or I²C serial interface.
● Reports accurate Time-to-Empty at both measured and host-requested load value
● Reports available capacity compensated for discharge rate, temperature and age
● End-of-discharge voltage compensated for discharge rate and temperature
● Automatic capacity reduction with age
● Reports temperature, voltage and current
● High accuracy charge and discharge current integration with automatic offset calibration
● Requires no user calibration
● Programmable input/output port
● Internal user EEPROM configuration memory
● Uploadable coefficients allows host-side use with multiple pack characteristics
● Stable oscillator without external components
● Green product and no Sb/Br
