Title:
SWITCHING POWER SUPPLY CONTROL METHOD AND SWITCHING POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2023/078362
Kind Code:
A1
Abstract:
Embodiments of the present application disclose a switching power supply control method and a switching power supply. The switching power supply control method comprises: after high-voltage startup of a switching power supply, a secondary-side control module adjusts the cut-off current of a second switching tube according to the voltage waveform of a second connection point; when the voltage waveform of a first connection point just returns to zero, a primary-side control module controls a first switching tube to be turned on; after the first switching tube is turned on, the primary-side control module adjusts the peak current of the first switching tube; when the peak current of the first switching tube reaches a preset value, the primary-side control module controls the first switching tube to be turned off; after the first switching tube is turned off, the secondary-side control module controls the second switching tube to be turned on; when the switching current of the second switching tube is at a current zero-crossing point, the secondary-side control module controls the second switching tube to be turned off.
Inventors:
GU DIEFEN (CN)
Application Number:
PCT/CN2022/129615
Publication Date:
May 11, 2023
Filing Date:
November 03, 2022
Export Citation:
Assignee:
MIPTECH LTD (CN)
International Classes:
H02M3/335; H02M1/44
Foreign References:
CN113890378A | 2022-01-04 | |||
CN108539986A | 2018-09-14 | |||
CN112054659A | 2020-12-08 | |||
CN109039093A | 2018-12-18 | |||
CN111478589A | 2020-07-31 | |||
CN108667302A | 2018-10-16 | |||
US20210143725A1 | 2021-05-13 | |||
CN113131746A | 2021-07-16 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
Download PDF:
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