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Reducing common mode noise of power factor correction converters using general balance concept

  • US 7,804,281 B2
  • Filed: 09/13/2006
  • Issued: 09/28/2010
  • Est. Priority Date: 09/13/2006
  • Status: Expired due to Fees
First Claim
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1. A power supply circuit comprisingan inductor configured in two portions, said two portions of said inductor being connected in series,a switch controlling conduction through said two portions of said inductor,circuit portions having respective parasitic capacitances, said parasitic capacitances being independent of parasitic capacitances of said two portions of said inductor,said parasitic capacitances and said two portions of said inductor forming a bridge circuit and said switch being a source of noise voltage, andmeans for approximately balancing currents due to said switch and the equivalent impedance ratio of said parasitic capacitances of said circuit portions to a ratio of inductances of said two portions of said inductor.

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