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APPARATUS, SYSTEM, AND METHOD FOR A LOW COST SELF-HEALING POWER SUPPLY

  • US 20090168472A1
  • Filed: 12/28/2007
  • Published: 07/02/2009
  • Est. Priority Date: 12/28/2007
  • Status: Active Grant
First Claim
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1. A apparatus to regulate voltage, the apparatus comprising:

  • a power supply that regulates a direct current (“

    DC”

    ) regulated bus to maintain a regulated bus voltage under varying load conditions, the power supply comprisingat least one pulse-width modulated stage, each pulse-width modulated stage comprising at least two switches connected in parallel, each switch comprising a fuse connected in series with the switch that disconnects the switch in response to an over current condition sufficient to open the fuse; and

    a pulse-width modulator for each stage of the power supply that regulates a bus voltage controlled by the stage by sensing the controlled bus voltage and adjusting a switching duty cycle to regulate the controlled bus voltage to a target value, wherein the pulse-width modulator for a stage provides a substantially identical switching duty cycle to each switch of the stage, the switching duty cycle comprising a signal to control a switch on and then off for a portion of a switching period.

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