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Systems and methods for enhanced efficiency auxiliary power supply module

DC
  • US 9,966,848 B2
  • Filed: 12/28/2016
  • Issued: 05/08/2018
  • Est. Priority Date: 09/02/2009
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a first stage power converter to generate a first output from a direct current input;

    a second stage power converter connected to the first stage power converter to convert the first output to a second output;

    a micro-controller;

    a power absorption circuit; and

    a control circuit coupled with the first stage power converter and the second stage power converter, the control circuit powered by the first output to control the second stage power converter, wherein;

    when the second stage power converter is in a first mode of not providing the second output to power the micro-controller, the control circuit monitors a voltage of the first output powering the power absorption circuit and signals the second stage power converter to remain in the first mode during a time period in which the voltage is below a threshold; and

    when the voltage is above the threshold, the control circuit signals the second stage power converter to enter a second mode of providing the second output to power the micro-controller.

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