bq27000

The bqJUNIOR series are highly accurate stand-alone single-cell Li-Ion and Li-Pol battery capcity monitoring and reporting devices targeted at space-limited,portable applications.The ICmonitors 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 of bq27000 are applied to the capacity measurments 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 bq27000 can operate directly from single-cell Li-Ion and Li-Pol batteries and communicates to the system over a HDQ one-wire or I2C serial interface.