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 (CN)
Application Number:
PCT/CN2018/071593
Publication Date:
July 11, 2019
Filing Date:
January 05, 2018
Export Citation:
Assignee:
MENG JIAQING (CN)
International Classes:
H02M7/04
Foreign References:
| CN104104216A | 2014-10-15 | |||
| CN202183735U | 2012-04-04 | |||
| CN104079188A | 2014-10-01 | |||
| CN204030996U | 2014-12-17 | |||
| CN201781420U | 2011-03-30 | |||
| US20100142232A1 | 2010-06-10 |
Attorney, Agent or Firm:
NOZO & ASSOCIATES (CN)
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