本文主要研製一自激式高頻脈波LED驅動電路，此電路採用自激半橋串聯諧振換流器，以整流後之高頻脈波驅動LED，並量測LED在高頻脈波驅動下之發光特性。此外，於LED模組前使用四顆二極體作橋式整流，藉此提高LED的利用率，並以自激半橋串聯諧振換流器控制燈管電流的方式，藉由可飽和變壓器達成LED的電流控制。本文亦探討LED之等效電路對半橋串聯諧振換流器電路特性的影響，並分析及探討其動作原理及電壓增益。最後，實際研製一18瓦自激式高頻脈波LED驅動電路以驗證其可行性，電路操作於輸入電壓100 ~ 120 Vrms時，效率均維持在86.7%以上，最佳效率可達89.2%。

In this thesis, the study and implementation of high frequency pulse LED driver with self-oscillating circuit is presented. The self-oscillating half-bridge series resonant inverter is adopted to drive LED and the light emitting characteristics of LED driven with high frequency pulse voltage is also discussed. The LED module is connected with full-bridge diode rectifier to increase the utilization ratio of LED. In addition, the self-oscillating circuit with saturable transformer is used to control the current of LED. In this thesis, the effectiveness of the LED equivalent circuit on the resonant circuit and the operating principle of the self-oscillating half-bridge inverter are discussed in detail. Finally, a high frequency pulse driver is implemented to drive a 18 W LED module. Experimental results show that the circuit efficiency is over 86.5% and the maximum circuit efficiency is 89.2% when the input voltage is from 100 ~ 120 Vrms.

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