Patent ID: 11870342
Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 30:
31. The resonant converter of claim 28, wherein the control circuit comprises:
an output sampling processor configured to receive an output voltage and provide a scaled output voltage;
a comparator configured to receive the scaled output voltage and a reference voltage and provide an error signal; and
a control loop configured to provide the switching frequency according to the error signal and compare the switching frequency with a preset switching frequency,
wherein when the switching frequency is greater than a preset switching frequency, the control circuit is configured to stop providing a phase-shifting angle and control the plurality of secondary switches operating in a normal state, and
when the switching frequency is lesser than or equal to the preset switching frequency, the control circuit is configured to provide the phase-shifting angle and control at least one of the plurality of secondary switches to be turned on during a first time interval.