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Integrated light-emitting diode driver circuit and method of operating the same

  • US 9,351,379 B2
  • Filed: 12/31/2014
  • Issued: 05/24/2016
  • Est. Priority Date: 07/04/2014
  • Status: Active Grant
First Claim
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1. An integrated light-emitting diode driver circuit, comprising:

  • a bi-directional power line communication unit comprising a microcontroller, the microcontroller being configured to receive an AC voltage and a conversion voltage as an operation voltage of the microcontroller, and to generate a voltage signal based on the AC voltage, the bi-directional powerline communication unit being configured to convert the voltage signal to generate a modulation signal and to generate a light-dimming control signal based on the modulation signal;

    a power conversion module configured to receive the AC voltage and to convert the AC voltage to generate an output voltage; and

    a constant current/constant voltage control unit configured to receive the light-dimming control signal and to generate a constant light-dimming current or a constant light-dimming voltage,wherein the integrated light-emitting diode driver circuit is configured to output the constant light-dimming current or the constant light-dimming voltage and to output the output voltage to drive a light-emitting diode string configured to be driven by the light-emitting diode driver circuit.

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