3-to-16 cell Li-ion stack guard
The Texas Instruments BQ7721602PWR is a voltage and temperature protection IC designed for Lithium Ion battery stacks of 3 to 16 series cells. It monitors each cell for over-voltage, under-voltage, and over-temperature conditions, triggering a fault output when any threshold is exceeded. Housed in a 24-TSSOP package (0.173", 4.40 mm width) for surface-mount assembly, the part operates across a -40°C to 85°C ambient temperature range — covering the full industrial thermal envelope for battery management systems in portable tools, e-bikes, energy storage, and backup power units.
Active production — no end-of-life watch needed
No pin-compatible second source or official successor is documented in the TI portfolio for this exact function and cell-count range. The BQ7721602PWR is a single-source line item — the BOM should carry a risk flag if volume continuity is critical, though the active status means supply is stable for the foreseeable future.
Package and procurement posture
Supplied in Tape & Reel (TR) or Cut Tape (CT) format, the 24-TSSOP body has a 0.65 mm pin pitch typical for this footprint family. The surface-mount package suits automated pick-and-place assembly; no special handling beyond standard MSL precautions is required.