Control circuit applied to a power converter and operation method thereof
A control circuit applied to a power converter includes a multi-functional pin, a zero-crossing signal generator, and an over-voltage detector. The multi-functional pin is used for receiving an auxiliary current generated by an auxiliary winding of the power converter, and an input current. The zero-crossing signal generator is used for generating a zero-crossing signal according to the auxiliary current. The over-voltage detector is used for generating an over-voltage signal according to the auxiliary current. The control circuit generates a switch control signal to the power switch according to the zero-crossing signal, or generates an over-voltage protection signal to the power switch according to the over-voltage signal.
Leadtrend Technology Corp.
H H H
H02H H02H H02H
inventional inventional inventional
Da-Chun Ming-Chang Meng-Jen Chih-Chi
Wei Tsou Tsai Chang