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Power Converter for Led Large Area Light Source Lamp

  • US 20080084167A1
  • Filed: 09/27/2005
  • Published: 04/10/2008
  • Est. Priority Date: 10/01/2004
  • Status: Active Grant
First Claim
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1. Power converter for receiving an input current at an input voltage and for providing an output current at an output voltage, said power converter comprising:

  • a transformer having a primary and at least one secondary side, the transformer showing a mutual inductivity Lm and a leakage inductivity Ls;

    at least one switching device being operated at an operating frequency ƒ

    op at the primary side of said transformer;

    a capacitor Cs at the primary side of said transformer, said capacitor forming a resonant circuit with said leakage inductivity Ls of said transformer,wherein said operating frequency, said capacitor Cs, said mutual inductivity Lm and said leakage inductivity Ls are matched such that the effective value of the output current is substantially constant with respect to variations of a load being traversed by said output current.

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