BQ27Z855-FW

BQ27Z855-FW is a firmware-only release that can be flashed onto any existing BQ27Z855 hardware. The firmware incorporates the patented Dynamic Z Track™ technology to create a pack-based solution that provides a rich array of features for gas gauging, protection, and authentication for 1-series cell Li-ion and Li-polymer battery packs. 

BQ27Z855-FW includes integrated linear charger functionality to manage linear charging during Charge mode and ideal diode during Discharge mode. Using its integrated high-performance analog peripherals, BQ27Z855-FW measures and maintains an accurate record of available capacity, voltage, current, temperature, and other critical parameters in Li-ion batteries and reports this information to the system host controller over an I2C compatible interface. SHA-1, SHA-256, and ECC authentication, with secure memory for authentication keys, enables identification of genuine battery packs.