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离线可调光LED电源的输入电磁干扰滤波器设计_英版
消耗积分:1 |
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大小:1.18 MB |
2016-10-19
titanfigure
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Power supplies developed for LED-based solid-state lamps must incorporate input EMI filters to comply with government regulations and agency standards. The insertion of a passive EMI filter is known to interfere with external TRIAC-based phase dimmers and cause visible light flicker when dimming. In this paper, we will investigate different EMI filter configurations suitable for LED drivers, analyze differentialand common-mode noise-attenuation techniques, and outline a simple SPICE-based EMI filter design procedure. We will also explain how the EMI filter and external dimmer interact and propose design methods to ensure reliable system operation.
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