Texas Instruments UCC2919DG4

Description
The UCC3919 family of hot swap power managers provides comprehensive power management, hot swap, and fault handling capabilities. It employs a duty ratio current limiting technique, enabling peak load capability while limiting average power dissipation in the external pass transistor during fault conditions. The UCC3919 offers two reset modes, selectable via the L/R pin. In one mode, the IC attempts to reset itself repeatedly upon a fault occurrence, with user-defined maximum output current and pass transistor power dissipation. In the other mode, the output latches off until the L/R pin is reset or the shutdown pin is toggled. An onboard charge pump circuit provides the necessary gate voltage for an external N-channel power FET.

Features
Precision fault threshold
Charge pump for low RDS(on) high side drive
Differential sense inputs
Programmable average power limiting
Programmable linear current control
Programmable fault time
Fault output indicator
Manual and automatic reset modes
Shutdown control with programmable softstart
Undervoltage lockout
Electronic circuit breaker function

Applications
Hot swap power management
Fault handling
Power supply protection
Electronic circuit breakers