Battery protection for 3-to-5-cell Li-Ion packs
The Texas Instruments BQ7790522PW is a battery protection IC designed for 3 to 5 series-connected Lithium Ion cells. It integrates overcurrent, over/under voltage, short-circuit, and overtemperature fault protection into a single 20-TSSOP package. The device operates over the industrial temperature range of -40°C to 85°C, suiting it for portable tools, e-bikes, energy storage, and other multi-cell Li-Ion applications where a dedicated protection controller is required rather than a discrete comparator-and-FET solution.
Package and mounting
The 20-TSSOP package (4.40 mm body width) is a surface-mount footprint common in portable electronics. The Tube shipping medium is typical for prototype and low-to-medium volume assembly; for higher volumes the part is also available in Tape & Reel under a different order code. The -40°C to 85°C operating range covers the majority of industrial and consumer battery applications without requiring automotive-grade qualification.