Primary Side PWM Controller for Low Power Offline SMPS
NCP1362
The NCP1362 is a highly integrated primary side quasi−resonant flyback controller capable of controlling rugged and high−performance off−line power supplies.
Due to a Novel Method this new controller saves the secondary feedback circuitry for Constant
Voltage and Constant Current regulation, achieving excellent line and load regulation without traditional opto coupler and TL431
voltage reference.
The NCP1362 operates in valley lockout quasi−resonant peak current mode control mode at high load to provide high efficiency.
When the power on the secondary side starts to diminish, the controller automatically adjusts the duty−cycle th...