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Converter digital control circuit with adaptive compensation

  • US 10,181,791 B2
  • Filed: 01/22/2018
  • Issued: 01/15/2019
  • Est. Priority Date: 04/14/2017
  • Status: Active Grant
First Claim
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1. A control circuit for a voltage regulator comprising at least one switch responsive to a voltage control signal for switching at a switching frequency and an output filter having a corner frequency, the voltage regulator configured to convert an input voltage into a regulated output voltage, comprising:

  • a divider coupled to the regulated output voltage to generate a divided voltage having a value that is a fraction of the regulated output voltage;

    an ADC responsive to the divided voltage to generate a feedback control signal;

    a digital compensator responsive to the feedback control signal to generate a compensator signal, wherein the digital compensator comprises a gain parameter that is inversely proportional to the input voltage and is independent of the switching frequency; and

    a pulse width modulator responsive to the compensator signal to generate the voltage control signal.

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