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RESONANT DC CONVERTER

  • US 20140112026A1
  • Filed: 11/26/2012
  • Published: 04/24/2014
  • Est. Priority Date: 10/24/2012
  • Status: Abandoned Application
First Claim
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1. A resonant DC converter, used to convert a DC input voltage into a DC output voltage in order to provide a load with power supply, comprising:

  • a front-end conversion circuit, comprising a half-bridge resonant DC conversion circuit and a voltage-type auto charge pump circuit, wherein the half-bridge resonant conversion circuit is provided with a positive voltage terminal and a negative voltage terminal at an input side respectively connecting a first active switching element and a second active switching element to a positive voltage terminal of a first inductor, the positive voltage terminal of the first inductor is coupled to one common node between the first active switching element and the second active switching element, a negative voltage terminal of the first inductor;

    is coupled in series to a semi-resonant circuit of the voltage-type auto charge pump circuit, the semi-resonant circuit contains a second inductor and a first capacitor coupled with the second inductor in parallel, and the voltage-type auto charge pump circuit further includes a second capacitor coupled in series to the semi-resonant circuit; and

    a transformer, wherein a primary side of the transformer is coupled to the front-end conversion circuit and to the second capacitor in parallel, a secondary side of the transformer is coupled to a rear-end conversion circuit which is electrically coupled with the front-end conversion circuit through the transformer.

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