BQ27Z746YAHR

BQ27Z746YAHR is a single-cell Impedance Track fuel gauge with integrated protection in a 2.78x1.96 mm DSBGA-15 (YAH) package. It combines gauging and pack protection in one device, supports SHA-256 authentication for pack identification, communicates over I2C or HDQ, keeps working down to a 2.0 V battery voltage, and records a black-box event log for fault analysis. Operating range is -40 C to +85 C. For battery-pack and host-system designers, integrating the gauge and protector removes a separate protection IC, authenticated packs reduce counterfeit-battery risk, and the black-box record shortens failure diagnosis when units return from the field. Selection advice: choose this code for compact single-cell packs that need accurate gauging plus built-in protection and authentication; if the pack already has a standalone protector and only needs gauging, a gauge-only device keeps the design simpler. Confirm the YAH chip-scale package fits your pack PCB layout and assembly process before release. Parameters verified against Texas Instruments documentation.