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Current-fed multiple-output power converter

  • US 7,538,527 B2
  • Filed: 08/13/2008
  • Issued: 05/26/2009
  • Est. Priority Date: 02/22/2005
  • Status: Active Grant
First Claim
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1. A power converter comprising:

  • a first stage comprising a current source for generating a current signal; and

    a second stage comprising;

    n output circuits coupled to the current source for converting the current signal into n corresponding output voltages, wherein each of the n output circuits comprises an output switch responsive to a corresponding nth control signal for regulating the corresponding nth output voltage; and

    a controller for generating the n control signals comprising;

    for each of the n output circuits;

    an error amplifier configured to generate an output signal based upon a comparison of the output voltage of the nth output circuit and a corresponding nth reference voltage;

    a waveform generator for generating a waveform signal, wherein the waveform signals for the n output circuits are characterized by a common amplitude and period, and wherein the phases of the waveforms signals are spaced at predetermined intervals; and

    a summing circuit for summing the output of the error amplifier and the waveform signal to generate an amplitude-shifted waveform signal; and

    a comparator circuit for outputting the n control signals to the output switches based upon a comparison of the relative amplitudes of the amplitude-shifted waveform signals.

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