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 6:
7. The power conversion circuit adopting the isolation type power conversion method based on demagnetization iteration control according to claim 6, characterized in that the secondary side control circuit internally comprises:
the power supply unit, electrically connected with the secondary side positive output end of the high-frequency transformer in the excitation stage to obtain electric energy, so as to charge the secondary side power supply capacitor in the charging capacitor circuit;
the ripple injection module, used for providing a ripple signal required for summation with a feedback voltage value of the output feedback circuit;
a summator, used for summing the ripple signal and the feedback voltage value of the output feedback circuit;
the demagnetization time iteration control unit, used for realizing the communication handshake control and demagnetization time iteration control between the secondary side control circuit and the primary side control circuit through the high-voltage capacitor isolation circuit;
the secondary side turn-off/turn-on unit, used for controlling turn-off/turn-on of the secondary side synchronous rectifier tube and the demagnetization time iteration control unit;
a reference voltage circuit, used for providing the reference voltage value used for being compared with a summation result between the ripple signal and the feedback voltage value of the output feedback circuit;
a first comparator, used for comparing the summation result between the ripple signal and the feedback voltage value of the output feedback circuit with the reference voltage value of the reference voltage circuit; and
the control signal modulation circuit, used for modulating the communication handshake signal output by the demagnetization time iteration control unit.