Patent ID: 11942856
Assignee: ARK MICROELECTRONIC CORP. LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A control module configured to alternately turn on and turn off a power switch of a power conversion apparatus to provide an output voltage, the control module comprising:
a timing unit configured to set a blanking time interval according to a feedback signal of the power conversion apparatus, wherein the feedback signal is related to a load,
a detection unit configured to detect a resonance voltage at a primary side of the power conversion apparatus, and configured to detect an auxiliary voltage at the primary side to provide to provide a level signal corresponding to a voltage level of the output voltage according to the auxiliary voltage, and
a control unit coupled to the detection unit, and configured to set a predetermined counting threshold according to the level signal, and count a number of oscillation turning points presented during an oscillation of the resonance voltage after the blanking time interval ends, and turn on the power switch when the number reaches the predetermined counting threshold.