Patent ID: 11949337
Assignee: PHIHONG TECHNOLOGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 9:
10. A controlling method of a flyback power converter, comprising:
generating a first control signal by a controller to turn on a main switching device;
conducting a diode of a zero current detection circuit to generate a relative current to charge a capacitor when a current generated by an output diode is detected;
sending a second control signal by an output terminal of a first comparator of said zero current detection circuit to control a demagnetization detection terminal voltage of said controller to be a first potential, and an output terminal of a high-end driver to be said first potential, to turn off an active clamp switching device; and
turning on said main switching device as an output terminal of said controller is switched to a second potential greater than said first potential;
wherein said output terminal of said first comparator is electrically coupled to said controller, and a second comparator having an output terminal is coupled to a first input terminal of said first comparator.