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PFC LED DRIVER HAVING A FLICKER CONTROL MECHANISM

  • US 20140252969A1
  • Filed: 03/11/2013
  • Published: 09/11/2014
  • Est. Priority Date: 03/11/2013
  • Status: Active Grant
First Claim
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1. A PFC LED driver having a flicker control mechanism, comprising:

  • a bridge rectifier, used to generate a full-wave-rectified line input voltage according to an AC power;

    a single stage PFC constant average current converter, coupled with said bridge rectifier and used for forcing an input current to track said full-wave-rectified line input voltage and regulating an average value of an output current at a first preset value; and

    a current ripple reducing unit, in series with an LED module to form a load for said output current to flow through, wherein said current ripple reducing unit has a negative feedback control mechanism for forcing a peak of said output current approach an average value of said output current.

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