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SWITCHED MODE POWER SUPPLY OUTPUT FILTER CONFIGURATION

  • US 20150331984A1
  • Filed: 12/01/2014
  • Published: 11/19/2015
  • Est. Priority Date: 03/31/2014
  • Status: Active Grant
First Claim
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1. A method of determining a configuration of capacitors in an output filter of a switched mode power supply, SMPS, the method comprising:

  • generating candidate configurations of capacitors defining respective arrangements of capacitors of different kinds in the output filter, each candidate configuration being associated with a respective value of a cost function that is calculated based on a number of capacitors of each kind in the candidate configuration and a cost assigned to each kind of capacitor, the candidate configurations being ordered in order of increasing or decreasing values of the cost function; and

    performing a binary search on the ordered candidate configurations of capacitors to determine a capacitor configuration associated with a lowest value of the cost function from among candidate configurations of capacitors that are determined during the binary search to allow a load transient response requirement of the SMPS to be fulfilled,wherein whether a candidate configuration allows the load transient response requirement of the SMPS to be fulfilled is determined using a model of a SMPS having the candidate configuration of the output filter to simulate a deviation of an output voltage of the SMPS in response to a change in a load current of the SMPS, and determining whether the load transient response requirement is fulfilled based on the simulated deviation of the output voltage.

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