Title:
SWITCHING POWER SUPPLY AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/077751
Kind Code:
A1
Abstract:
A switching power supply and an electronic device. The switching power supply comprises: an active clamping circuit (1) and a transformer (2); the active clamping circuit (1) comprises a first clamping capacitor (C1) and a second clamping capacitor (C2); the active clamping circuit (1) further comprises a path guidance module (11); the path guidance module (11) is separately connected to both ends of the first clamping capacitor (C1) and both ends of the second clamping capacitor (C2); the path guidance module (11), the first clamping capacitor (C1), and the second clamping capacitor (C2) are all directly or indirectly connected to a primary side of the transformer (2); the path guidance module (11) is used for guiding, within a first time period, the first clamping capacitor (C1) and the second clamping capacitor (C2) to respectively obtain electric energy from different positions of the primary side of the transformer (2), and guiding, within a second time period, the first clamping capacitor (C1) and the second clamping capacitor (C2) to discharge, after being connected in parallel, to the primary side of the transformer (2).
Inventors:
GUO CHUNMING (CN)
QIU ZHIWEI (CN)
ZHANG CHENGLONG (CN)
QIU ZHIWEI (CN)
ZHANG CHENGLONG (CN)
Application Number:
PCT/CN2020/135487
Publication Date:
April 21, 2022
Filing Date:
December 10, 2020
Export Citation:
Assignee:
HUAYUAN SEMICONDUCTOR SHENZHEN LTD COMPANY (CN)
International Classes:
H02M3/28
Foreign References:
| CN111030462A | 2020-04-17 | |||
| CN107994762A | 2018-05-04 | |||
| CN209375473U | 2019-09-10 | |||
| CN101325375A | 2008-12-17 | |||
| CN210120487U | 2020-02-28 | |||
| US20170070152A1 | 2017-03-09 |
Attorney, Agent or Firm:
SHANGHAI HUIHAN INTELLECTUAL PROPERTY LAW FIRM (CN)
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