Title:
SELF-POWERED METHOD FOR CURRENT DETECTION OF BUILT-IN HIGH-VOLTAGE POWER TUBE
Document Type and Number:
WIPO Patent Application WO/2023/087716
Kind Code:
A1
Abstract:
Provided is a self-powered method for current detection of a built-in high-voltage power tube. A switching circuit based on a switching power supply comprises a transformer, a control chip, a power storage capacitor, a secondary rectifier diode, a secondary energy storage capacitor, and a load. The control chip internally comprises a high-voltage power tube, a low-voltage power tube, a self-powered diode, and a control circuit. Regulation and switching of a non-self-power supply period and a self-power supply period are achieved by means of on and off control over the high-voltage power tube and the low-voltage power tube of the control chip, such that the power tubes are turned off in each switching period when the excitation inductive current on the primary side of the transformer reaches the maximum excitation peak current of the internally set high-voltage power tube, and meanwhile, the requirements of maximum output power consistency and self-power supply are met.
Inventors:
CHENG ZHAOHUI (CN)
YU WEI (CN)
DU YANBIN (CN)
YANG XINHE (CN)
YU WEI (CN)
DU YANBIN (CN)
YANG XINHE (CN)
Application Number:
PCT/CN2022/101740
Publication Date:
May 25, 2023
Filing Date:
June 28, 2022
Export Citation:
Assignee:
DONGKE SEMICONDUCTOR ANHUI CO LTD (CN)
International Classes:
H02M1/088; H02M3/335
Domestic Patent References:
| WO2019115913A1 | 2019-06-20 |
Foreign References:
| CN114050711A | 2022-02-15 | |||
| CN106685236A | 2017-05-17 | |||
| CN109039112A | 2018-12-18 | |||
| CN113067456A | 2021-07-02 | |||
| CN113114027A | 2021-07-13 | |||
| CN106655747A | 2017-05-10 | |||
| CN110932528A | 2020-03-27 | |||
| US20160211748A1 | 2016-07-21 |
Attorney, Agent or Firm:
HECHWISE PATENT & TRADEMARK FIRM (CN)
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