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High efficiency high frequency resonant power conversion

  • US 9,755,534 B2
  • Filed: 02/10/2014
  • Issued: 09/05/2017
  • Est. Priority Date: 02/14/2013
  • Status: Active Grant
First Claim
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1. A power converter comprising:

  • a switch network coupled to an input voltage port;

    a power transformer having a primary winding and a secondary winding, wherein the primary winding is coupled to the switch network, and the secondary winding is coupled to a rectifier, and wherein the rectifier is coupled to an output voltage port;

    a primary resonant tank having a first resonant capacitor and a first resonant frequency, and coupled to the primary winding of the power transformer and the switch network; and

    a regulation circuit configured to control an output voltage across two terminals of the output voltage port of the power converter to be substantially proportional to an input voltage applied to the input voltage port and the switch network to operate at a frequency substantially close to the first resonant frequency, wherein the regulation circuit has an input connected to a third winding on a primary side of the power transformer, and wherein a voltage across two terminals of the third winding is proportional to the output voltage across two terminals of the output voltage port of the power converter in the steady-state operation.

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