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Title:
SWITCH POWER SUPPLY CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/134123
Kind Code:
A1
Abstract:
A switch power supply circuit, comprising an alternating current power supply input terminal (10), a common-mode interference filter circuit (20), an alternating current rectifying circuit (30), a high-voltage electrolytic capacitor (C2), a filter anti-interference circuit (50), a peak absorption circuit (60), an energy converting circuit (70), a low-voltage rectifying circuit (80), a low-voltage peak filter circuit (90), and a direct current power supply output terminal (100). The switch power supply circuit performs pertinent positional movements and combinations of three devices: an X capacitor (C1), a transient voltage inhibiting device pressure-sensitive resistor (VR) and a discharging resistor (R), such that the entire power supply is improved in all aspects, such as interference resistance, accuracy, conversion efficiency, service life, and low failure rate; resistor (R1) and capacitor (C3) parameters in the absorption circuit (60) dedicated to absorbing leakage inductance counter electromotive force energy of a transformer are adjusted, thus improving the conversion efficiency of the power supply; resistor (R2) and capacitor (C4) parameters in an absorption circuit (110) for a low voltage side are adjusted, thus further improving the conversion efficiency of the power supply.

Inventors:
MENG, Jiaqing (Room 401, Fly-horse Building 6#, Starlight Garden, Bantian Subdistrict, Longgang Distric, Shenzhen Guangdong 0, 518000, CN)
Application Number:
CN2018/071593
Publication Date:
July 11, 2019
Filing Date:
January 05, 2018
Export Citation:
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Assignee:
MENG, Jiaqing (Room 401, Fly-horse Building 6#, Starlight Garden, Bantian Subdistrict, Longgang Distric, Shenzhen Guangdong 0, 518000, CN)
International Classes:
H02M7/04
Attorney, Agent or Firm:
NOZO & ASSOCIATES (Room 405, Building 01B Area E, Zhiheng New Industrial Park, Nantou, Nanshan Distric, Shenzhen Guangdong 0, 518000, CN)
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