BQ27010

(1) Stresses beyond those listed under"absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to Absolute Maximum Rated conditions for extended periods may affect device reliability

The bqJUNIOR series are highly accurate standalone single-cell Li-Ion and Li-Pol battery capacity monitoring and reporting devices targeted at space limited portable applications. The BQ27010 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, selfdischarge, and rate of discharge are applied to the charge counter to provide available time-to-empty and time-to-full information of BQ27010 across a wide range of operating conditions. Battery capacity is automatically recalibrated, or learned, in the course of a dis charge cycle from full to empty. Internal registers include available time-to-empty, cell temperature and voltage, average current, and other status and control registers.

The bqJUNIOR can operate directly from single-cell Li-Ion and Li-Pol batteries and communicates to the system over a simple one-wire bi-directional serial interface. The 5-kbits/s HDQ bus interfaces reduces communications overhead in the external microcontroller.