NCP1379 Datasheet (ON Semiconductor) - Quasi-Resonant Current-Mode Controller

NCP1379, Quasi-Resonant Current-Mode Controller

Pin N5 Pin Name Function 1 ZCD Zero Crossing Detection Adjust the over power protection 2 FB 3 CS 4 GND 5 DRV 6 VCC 7 Fault 8 CT Feedback pin Current sense * Driver output Supplies the controller Overvoltage protection Brown *out Timing capacitor Pin Description Connected to

NCP1379 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 becomes lighter.

This results in a stable operation despite switching events always occurring in the drain source valley.

This system works down to

NCP1379 Features

* a pin to implement a combined brown

* out/overvoltage protection. Particularly well suited for TVs power supply applications, the controller features a low startup voltage allowing the use of an auxiliary power supply to power the device. Features

* Quasi

* Resonant Peak Current