BQ28Z610DRZR

The BQ28Z610DRZR from Texas Instruments is an advanced battery fuel gauge IC with an integrated protector, suitable for 1 to 2 series Li-Ion/Li-Polymer battery packs. It utilizes the Impedance Track™ algorithm for accurate state-of-charge (SoC) monitoring and provides SHA-1 authentication for enhanced battery pack security.

This device features an I2C communication interface operating at up to 400-kHz, enabling high-speed programming and data access. Key electrical specifications include support for battery capacities ranging from 100 mAh to 32000 mAh. The IC includes programmable protection levels for over current, over temperature, over/under voltage, and short circuits. It also incorporates cell balancing capabilities, with options for both external and internal bypass.

The BQ28Z610DRZR operates within a temperature range of -40°C to 85°C. It is housed in a compact 12-pin VSON package (DRZ) with exposed pad dimensions of 4 mm x 2.5 mm, designed for surface mounting. The high-accuracy coulomb counter has a typical input offset error of less than 1 µV, supporting a 1-mΩ current sense resistor for precise 1-mA current measurement. This makes it suitable for applications requiring detailed battery monitoring and management.