Title:
SWITCHING POWER SUPPLY CONTROL METHOD AND SWITCHING POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2023/036176
Kind Code:
A1
Abstract:
Disclosed in embodiments of the present application are a switching power supply control method and a switching power supply. The control method comprises: in response to a switching time interval of a second switch tube being equal to or less than a first preset value after high-voltage turn-on of a switching power supply, a secondary side control module obtains the voltage waveform at a second connection point between a secondary side winding and a second switch tube; in response to the voltage waveform at the second connection point not realizing zero-voltage switching, the secondary side control module regulates the cut-off current of the second switch tube until the voltage waveform at a first connection point between a primary side winding and a first switch tube exactly falls to zero; and in response to the voltage waveform at the first connection point exactly falling to zero, a primary side control module controls the first switch tube to be turned on, so as to realize zero-voltage turn-on of a primary side.
Inventors:
GU DIEFEN (CN)
Application Number:
PCT/CN2022/117528
Publication Date:
March 16, 2023
Filing Date:
September 07, 2022
Export Citation:
Assignee:
MIPTECH LTD (CN)
International Classes:
H02M1/44; H02M1/00; H02M3/335; H02M7/219
Foreign References:
| CN113765365A | 2021-12-07 | |||
| CN105529791A | 2016-04-27 | |||
| CN105529799A | 2016-04-27 | |||
| CN212677084U | 2021-03-09 | |||
| CN112134443A | 2020-12-25 | |||
| US20150207420A1 | 2015-07-23 | |||
| US20150015071A1 | 2015-01-15 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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