Patent ID: 11909322
Assignee: WUXI SI-POWER MICRO-ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 5:
6. The power conversion circuit adopting the isolation type power conversion method based on demagnetization iteration control according to claim 5, characterized in that the primary side control circuit internally comprises:
the oscillator module, used for providing the working pulse oscillation signal in the primary side control circuit;
the one-out-of-two selector, used for receiving the working pulse oscillation signal output by the oscillator module and receiving the communication signal transmitted by the high-voltage capacitor isolation circuit;
a D trigger, used for receiving the communication signal transmitted by the high-voltage capacitor isolation circuit and outputting a trigger result to a control end of the one-out-of-two selector from an output end; and
the adaptive turn-on time control circuit, used for receiving an output signal of the output end of the one-out-of-two selector and controlling the turn-on and turn-off time of the primary side power tube in the power switch tube circuit according to the magnitude of the primary side bus voltage VIN of the high-frequency transformer; wherein
the oscillator module is electrically connected with a ‘0’ input end of the one-out-of-two selector, a ‘1’ input end of the one-out-of-two selector is electrically connected with an output end of a control signal demodulation circuit, a Q output end of the D trigger is electrically connected with the control end of the one-out-of-two selector, a D input end of the D trigger is electrically connected with a high level, a time sequence CLK input end of the D trigger is electrically connected with the high-voltage capacitor isolation circuit through the control signal demodulation circuit, and the output end of the one-out-of-two selector is electrically connected with the adaptive turn-on time control circuit comprised in the primary side control circuit.