NCP1379 Datasheet | onsemi

Quasi-Resonant Current-Mode Controller for High-Power Universal Off-line Supplies The NCP1379 hosts a high- performance circuitry aimed to powering quasi- resonant converters. Capitalizing on a proprietary valley- lockout system, the controller shifts gears and reduces the switching frequency as the power loading bees lighter. This results in a stable operation despite switching events always occurring in the drain- source valley. This system works down to the 4th valley and toggles to a variable frequency mode beyond, ensuring an excellent standby power performance. The controller includes an Over Power Protection circuit which clamps the delivered power at high- line. Safety- wise,...