Digital average input current control in power converter

  • US 9,673,711 B2
  • Filed: 07/07/2014
  • Issued: 06/06/2017
  • Est. Priority Date: 08/06/2007
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • sampling an inductor current of an inductor of a converter;

    sampling an input voltage of the converter;

    sampling an output voltage of the converter;

    predicting, by a controller, the inductor current based on the sampled inductor current, the sampled input voltage, and the sampled output voltage;

    controlling a duty cycle based on the predicted inductor current to cause an input current of the converter to approach a desired input current; and

    transferring the converter from an alternating buck-boost mode to a buck mode or a boost mode in response to the duty cycle dropping below or climbing above a threshold for at least a predetermined number of cycles.

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