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Design and Implementation of Active Bleeder for TRIAC Dimmable LED Driver

机译:用于TRIAC可调杆led驾驶员有源泄放器的设计与实现

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In this paper, the analysis and implementation of active bleeder for TRIAC dimmable LED driver is presented. The insufficient holding current problem occurs when LED driver is connected to TRIAC dimmer, causing TRIAC dimmer misfire and LED flicker. Therefore, a bleeder circuit is parallel-connected to provide TRIAC enough holding current. In the bleeder, the resistor is usually used to control the amount of current through the bleeder, and cause high power loss on the resistor. A bleeder circuit with an inductor, a capacitor and switches is used to provide TRIAC dimmer extra current to reduce the power dissipation by using a resistor. Finally, the hardware type of the bleeder circuit with input voltage of 90~135V is implemented, and able to applied on the TRIAC dimmable 7.2W LED driver. The bleeder can provide enough holding current, widening the conducting angle of TRIAC dimmer with no flicker and misfire occur.
机译:本文介绍了TRIAC可调光电驾驶员有源渗流器的分析和实施。当LED驱动器连接到TRIAC调光器时,会发生不足的保持当前问题,导致TRIAC调光器失火和LED闪烁。因此,泄放电路并联连接以提供足够的保持电流。在渗流器中,电阻通常用于控制通过渗流器的电流量,并在电阻器上引起高功率损耗。具有电感器,电容器和开关的泄放电路用于提供TRIAC调光器额外电流,以通过使用电阻来降低功耗。最后,实现了90〜135V输入电压的泄放电路的硬件类型,并能够在三端双向可控硅可调位数7.2W LED驱动器上施加。泄放器可以提供足够的保持电流,加宽TRIAC调光器的导电角度,不会发生闪烁和失火。

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