Title:
DRIVING CIRCUIT AND SWITCHING POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2024/016997
Kind Code:
A1
Abstract:
The present application provides a driving circuit and a switching power supply. The driving circuit comprises a control circuit, an energy recovery circuit, a duration determination circuit, and an input power supply. The energy recovery circuit comprises a switching device and an energy storage inductor. The duration determination circuit is configured to determine a target duration. The energy recovery circuit is electrically connected to the input power supply, and is configured, under the control of the control circuit, to charge the energy storage inductor in a first current direction/second current direction according to the target duration; to turn on/off a power tube; and to control at least one switching device to be turned on for the target duration by means of a channel so as to enable energy to flow back to the input power supply. According to the present application, the target duration for which the input power supply charges the energy storage inductor is determined, and at an energy recovery stage, the switching device is turned on for the target duration by means of the channel, so that the energy stored on the energy storage inductor flows back to the input power supply by means of the channel. In this way, the energy on the energy storage inductor can directly flow back to the input power supply by means of the channel of the switching device, without causing energy loss, such that the energy recovery rate can be greatly improved.
Inventors:
ZHANG WENLIN (CN)
WANG JUNKE (CN)
CHEN YUE (CN)
WANG JUNKE (CN)
CHEN YUE (CN)
Application Number:
PCT/CN2023/104086
Publication Date:
January 25, 2024
Filing Date:
June 29, 2023
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H02M1/08
Foreign References:
| CN115313803A | 2022-11-08 | |||
| CN115133752A | 2022-09-30 | |||
| CN111884491A | 2020-11-03 | |||
| JPH1052061A | 1998-02-20 | |||
| CN109980903A | 2019-07-05 | |||
| CN114025284A | 2022-02-08 | |||
| CN109698612A | 2019-04-30 |
Other References:
XIAOJUN GUO, JIE ZHANG, QINGHUA LIN, WEIMING LIN: "Novel Resonant Driving Circuit for Low-voltage Synchronous Rectifier", JOURNAL OF POWER SUPPLY, vol. 21, no. 2, 28 July 2021 (2021-07-28), pages 12 - 20, XP093130493
Attorney, Agent or Firm:
TDIP & PARTNERS (CN)
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