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Phase Lock Loop Controlled Current Mode Buck Converter

  • US 20140184180A1
  • Filed: 01/08/2013
  • Published: 07/03/2014
  • Est. Priority Date: 12/28/2012
  • Status: Active Grant
First Claim
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1. A feedback apparatus within a current mode buck converter comprising:

  • a first current level control circuit for establishing a first current level at which a switching stage within a power section of the current mode buck converter switches the direction of the slope of a current flowing through an inductor of the filter section of the power stage from a first directional slope to a second oppositely directional slope; and

    a second current level control circuit for establishing a second current level at which a switching stage within a power section of the current mode buck converter switches the direction of the slope of the current flowing through the inductor of the filter section of the power stage from the second oppositely directional slope to the first directional slope;

    wherein the second current level control circuit phase and frequency locks the current flowing through the inductor with a converter control clock applied to the second current level control circuit such that when the current flowing through the inductor is incorrectly triggered, the second current level is adjusted to lock the phase and frequency of the current flowing through the inductor to the converter control clock.

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