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 (CN)
SHEN ZHUO (CN)
SHEN ZHUO (CN)
Application Number:
PCT/CN2019/083637
Publication Date:
October 31, 2019
Filing Date:
April 22, 2019
Export Citation:
Assignee:
SHANGHAI TUITUO TECH CO LTD (CN)
International Classes:
H02M1/42; H02M3/156; H02M3/335; H02M3/337
Foreign References:
| CN108521223A | 2018-09-11 | |||
| CN108471232A | 2018-08-31 | |||
| CN107204717A | 2017-09-26 | |||
| CN203896538U | 2014-10-22 | |||
| TW201440399A | 2014-10-16 | |||
| US20150303813A1 | 2015-10-22 |
Attorney, Agent or Firm:
SHANGHAI SAVVY IP AGENCY CO., LTD. (CN)
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