Single-cell fuel gauge with Impedance Track
The BQ27Z561YPHR is a Texas Instruments single-cell lithium-ion/polymer battery fuel gauge that uses the Impedance Track™ algorithm to report state-of-charge, remaining capacity, and time-to-empty over an I²C or HDQ serial bus. The 12-DSBGA package (1.68x2.05 mm) keeps the footprint small, but the 0.5 mm ball pitch on this wafer-level package means the board must be clean and the reflow profile tight — moisture sensitivity level is something to confirm before opening the reel.