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Multiple buck stage single boost stage optimizer

  • US 10,333,314 B2
  • Filed: 04/17/2017
  • Issued: 06/25/2019
  • Est. Priority Date: 04/17/2017
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a plurality of buck stages each having an input configured to receive a DC voltage from a DC power source and a buck stage output configured to provide a DC voltage;

    logic configured to operate the plurality of buck stages to regulate a power output of each of the DC power sources, including operate the respective buck stages at target duty cycles to maintain a target power efficiency for each buck stage, the combined DC voltages from the plurality of buck stage outputs depends on the target duty cycles; and

    a boost stage comprising a boost stage output and a single boost stage input configured to receive the combined DC voltages from the plurality of buck stage outputs;

    wherein the logic is further configured to instruct the boost stage to reduce the DC voltage at the input of the boost stage below a threshold voltage responsive to a determination that the combined DC voltages of the plurality of buck stages will be below the threshold voltage in order to maintain the target duty cycles of the respective buck stages.

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