The BQ20Z95DBTR is a battery multi-function controller IC designed by Texas Instruments for use with lithium-ion or lithium-polymer batteries. It comes in a 44-TSSOP package and supports battery configurations of 2 to 4 cells in series. This IC provides essential battery management features, including protection against over-current, over-temperature, over-voltage, under-voltage, and short circuits. It operates using the SMBus communication protocol, enabling efficient battery monitoring and maintenance. Its integration of multiple safety and monitoring functions into one component makes it a robust solution for managing rechargeable battery packs.