INTEGRATED LIGHT-EMITTING DIODE DRIVER CIRCUIT AND METHOD OF OPERATING THE SAME

摘要

An integrated light-emitting diode (LED) driver circuit includes a bi-directional power line communication (PLC) unit, a power conversion module, and a constant current (CC)/constant voltage (CV) control unit. The bi-directional PLC unit receives an AC voltage, and converts a modulation signal on the AC voltage to generate a light-dimming control signal. The power conversion module receives the AC voltage and converts the AC voltage to generate an output voltage. The CC/CV control unit receives the light-dimming control signal to generate a dimming constant current or a dimming constant voltage. The integrated LED driver circuit outputs the dimming constant current or the dimming constant voltage and the output voltage to drive a LED string.

主权项

1. An integrated light-emitting diode driver circuit receiving an AC voltage and converting the AC voltage to drive a light-emitting diode string, the integrated light-emitting diode driver circuit comprising:
a bi-directional power line communication unit receiving the AC voltage and converting a modulation signal on the AC voltage to generate a light-dimming control signal; a power conversion module receiving the AC voltage and converting the AC voltage to generate an output voltage; and a constant current/constant voltage control unit receiving the light-dimming control signal to generate a constant light-dimming current or a constant light-dimming voltage; wherein the integrated light-emitting diode driver circuit outputs the constant light-dimming current or the constant light-dimming voltage and the output voltage to drive the light-emitting diode string.