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Zero Current Switching

  • US 20090237043A1
  • Filed: 03/24/2009
  • Published: 09/24/2009
  • Est. Priority Date: 03/24/2008
  • Status: Active Grant
First Claim
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1. A method for providing non-resonant zero-current switching in a switching power converter operating in a continuous current mode, said switching power converter converting power from input power to output power, said switching power converter including a main switch connected to at least one main inductor, wherein an auxiliary inductor is connectible with the main inductor, wherein main current flows from an input to an output, the method comprising the steps of:

  • connecting the auxiliary inductor with the main inductor thereby charging the auxiliary inductor so that an auxiliary current flows from the output to the input opposing said main current; and

    upon a total current substantially equaling zero, switching on the main switch, wherein said total current includes a sum of said main current and said auxiliary current.

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