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Power control system using a nonlinear delta-sigma modulator with nonlinear power conversion process modeling

  • US 7,719,246 B2
  • Filed: 12/31/2007
  • Issued: 05/18/2010
  • Est. Priority Date: 05/02/2007
  • Status: Expired due to Fees
First Claim
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1. A power factor correction controller comprising:

  • a processor to receive and process one or more switching power converter feedback signals and generate a pulse width control signal using each processed feedback signal; and

    a pulse width modulator, coupled to the signal processor, having an input to receive the pulse width control signal and generate a pulse width modulated, power factor correction (PFC) control signal to control a switch that controls a power factor correction stage of the switching power converter;

    wherein a pulse width of the PFC control signal varies approximately with a square root of the PWM control signal.

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