UCC3957MTR-4

The UCC3957MTR-4 from Texas Instruments is a BiCMOS battery pack protector specifically designed for three- or four-cell lithium-ion battery applications. It operates with external P-channel MOSFETs to provide comprehensive protection, preventing system ground loss during overdischarge and safeguarding the IC and battery cells during overcharge states. An internal state machine continuously monitors each cell for overcharge and overdischarge conditions. A dedicated overcurrent protection block shields the battery pack from excessive discharge currents.

Key features include a two-tier overcurrent limiting system with externally adjustable delays, minimizing losses in overcharge mode through smart discharge. The device boasts a low typical supply current consumption of 30 µA, further reduced to 3.5 µA in sleep mode. It supports a VDD supply range of 6.5 V to 20 V and includes a highly accurate internal voltage reference. The UCC3957MTR-4 is available in a 16-SSOP surface mount package.

This IC is suitable for applications requiring reliable battery management and protection in portable electronics, power tools, and other devices utilizing lithium-ion battery technology. Its design facilitates integration with external MOSFETs for enhanced system safety and performance.