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LED driver with silicon controlled dimmer, circuit module and control method thereof

  • US 10,356,864 B2
  • Filed: 03/21/2018
  • Issued: 07/16/2019
  • Est. Priority Date: 04/06/2017
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a) a bleeder circuit coupled to a DC bus of a light-emitting diode (LED) driver having a silicon-controlled dimmer, wherein said bleeder circuit is controlled to discharge a current of said DC bus;

    b) a controller configured to control said bleeder circuit to discharge said DC bus at a first current after detecting a transition in a voltage of said DC bus; and

    c) said controller being configured to control said bleeder circuit to discharge said DC bus at a second current until said DC bus voltage rises to a predetermined load driving voltage, wherein said second current is less than said first current.

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