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Systems and methods for intelligent dimming control using TRIAC dimmers

  • US 10,342,087 B2
  • Filed: 07/13/2017
  • Issued: 07/02/2019
  • Est. Priority Date: 07/08/2014
  • Status: Active Grant
First Claim
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1. An apparatus for a power converter, the apparatus comprising:

  • a drive signal generator configured to receive an input signal associated with a TRIAC dimmer and output a drive signal to a switch to affect a current that flows through a winding of a power converter;

    wherein;

    the input signal includes a first pulse corresponding to a first input period, the first pulse being associated with a first pulse width; and

    the first pulse width is larger than a first threshold under one or more conditions;

    wherein the drive signal generator is further configured to;

    in response to the first pulse width being smaller than a second threshold, even if the first pulse width is still larger than the first threshold, maintain the drive signal at a first logic level without modulation to keep the switch open during at least the first input period.

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