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
Key Features
a pin to implement a combined brown.
out/overvoltage protection. Particularly well suited for TVs power supply.
Full PDF Text Transcription for NCP1379 (Reference)
Note: Below is a high-fidelity text extraction (approx. 800 characters) for
NCP1379. For precise diagrams, and layout, please refer to the original PDF.
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 ...
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9 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 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, a fixed internal timer relies on
NCP1379 Datasheet
