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Title:
SWITCHED-MODE POWER SUPPLY CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/206067
Kind Code:
A1
Abstract:
The present invention provides a switched-mode power supply circuit, comprising a boost inductor, a boost capacitor, an energy storage capacitor, a transformer or a DC-DC inductor, a first switch device, an output rectifier element, a filter capacitor, a feedback control circuit, a first rectifier circuit, and a second rectifier circuit. When the first switch device is turned on, the boost inductor, the boost capacitor, and the first switch device form a first boost loop, the boost inductor stores energy, and the energy storage capacitor, the first switch device, and the transformer or the DC-DC inductor form a first DC-DC loop. When the first switch device is cut off, the boost inductor, the boost capacitor, the energy storage capacitor, and the transformer or the DC-DC inductor form a second boost loop, and the transformer or the DC-DC inductor, the output rectifier element, and the filter capacitor form a second DC-DC loop. An output of the filter capacitor is connected to a load. The feedback control circuit drives the first switch device to turn on or turn off according to a chopped wave having a specific frequency and a duty cycle, so as to control a voltage, a current, or a power output to the load.

Inventors:
LI, Renhong (Building C, No. 888West Huanhu Er Road, New Nanhui Town, Pudong District, Shanghai 0, 201300, CN)
SHEN, Zhuo (Building C, No. 888West Huanhu Er Road, New Nanhui Town, Pudong District, Shanghai 0, 201300, CN)
Application Number:
CN2019/083637
Publication Date:
October 31, 2019
Filing Date:
April 22, 2019
Export Citation:
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Assignee:
SHANGHAI TUITUO TECHNOLOGY CO., LTD. (Building C, No. 888West Huanhu Er Road, New Nanhui Town, Pudong District, Shanghai 0, 201300, CN)
International Classes:
H02M1/42; H02M3/156; H02M3/335; H02M3/337
Foreign References:
CN108521223A2018-09-11
CN108471232A2018-08-31
CN107204717A2017-09-26
CN203896538U2014-10-22
TW201440399A2014-10-16
US20150303813A12015-10-22
Attorney, Agent or Firm:
SHANGHAI SAVVY IP AGENCY CO., LTD. (Unit 607, Shenergy International Building1 Middle Fuxing Road, Huangpu District, Shanghai 1, 200021, CN)
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