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Invention Grant
CN106937439B 发光二极管的控制电路及其主动式泄放电路 有权

发光二极管的控制电路及其主动式泄放电路
Abstract:
本发明提供一种发光二极管的控制电路及其主动式泄放电路，控制电路包含一发光二极管驱动器及主动式泄放电路，发光二极管驱动器驱动至少一发光二极管，并产生一电流侦测讯号，电流侦测讯号系相关于一发光二极管电流。主动式泄放电路包含一泄放电路，泄放电路耦接于发光二极管驱动器以接收电流侦测讯号，且依据电流侦测讯号汲取一泄放电流，以保持流过调光器的电流高于保持电流。
Abstract(English):

A control circuit for LED and an active bleeder thereof are provided. The control circuit comprises an LED driver and the active bleeder. The LED driver drives at least one LED and generates a current-sense signal. The current-sense signal is correlated to an LED current. The active bleeder comprises a bleeder circuit. The bleeder circuit is coupled to the LED driver to receive the current-sense signal and sinks a bleeding current in accordance with the current-sense signal for keeping the current flowing through the dimmer higher than the holding current.

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