Title:
SWITCHING POWER SUPPLY, AND POWER REPLENISHING CIRCUIT THEREOF AND POWER REPLENISHING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/087622
Kind Code:
A1
Abstract:
The present application relates to a switching power supply, and a power replenishing circuit thereof and a power replenishing method therefor. The power replenishing circuit of the switching power supply comprises: a control module, which is used for outputting a control signal for adjusting and controlling an output voltage of the switching power supply; a charging capacitor, which is used for storing electric energy and supplying power to the control module; a voltage withstand switching tube, which is used for acquiring a power supply voltage of a primary winding and outputting a charging voltage used for charging the charging capacitor; a charging switching tube, which is used for controlling whether the charging capacitor is charged; a primary-side control loop, which is used for controlling whether the primary winding is switched on; and a charging control unit, which is used for controlling whether the charging switching tube is switched on, wherein the charging control unit comprises: a voltage sampling feedback device, which is used for detecting a voltage signal of an auxiliary winding, and outputting, according to the voltage signal, a sampling signal to the control module when the voltage signal is at a resonance valley bottom.
Inventors:
WANG FULONG (CN)
ZHANG JIE (CN)
ZHENG LINGBO (CN)
ZHU MIN (CN)
ZHANG JIE (CN)
ZHENG LINGBO (CN)
ZHU MIN (CN)
Application Number:
PCT/CN2023/097167
Publication Date:
May 02, 2024
Filing Date:
May 30, 2023
Export Citation:
Assignee:
LII SEMICONDUCTOR CO LTD (CN)
International Classes:
H02M3/335; H02J7/34; H02M1/00
Foreign References:
| CN116032124A | 2023-04-28 | |||
| CN115395795A | 2022-11-25 | |||
| CN115498891A | 2022-12-20 | |||
| CN115589156A | 2023-01-10 | |||
| CN103391010A | 2013-11-13 | |||
| CN206498339U | 2017-09-15 | |||
| US20200287457A1 | 2020-09-10 |
Attorney, Agent or Firm:
BEIJING WEIZHENG PATENT AGENCY CO., LTD. (CN)
Download PDF: