本論文提出一種單級隔離型LED驅動器架構，文中採用順向式轉換器為主電路架構，實現減少電路元件和高功因之目的。一般照明應用上，雙級LED驅動電路可以達到高功因和輸出定電流的目的。然而，雙級LED架構有過多零件的問題。本驅動電路是使用連續導通模式功因修正控制器，電流應力較低且電磁干擾較少。本論文除了詳細說明電路架構中各元件值之設計考量，並提出一設計實例，最後以模擬與量測結果，驗證所提LED驅動電路具有高效率、高功因與隔離功能的優點。

A single-stage LED driver based on forward converter with power factor correction is proposed in this thesis. The studied single-stage LED driver offers the advantages of low parts count and high power factor in general lighting applications. A two-stage LED driver achieves the goals of high power factor and regulated output voltage. However, a two-stage LED driver has large parts count. The PFC control IC is operated in continuous conduction mode. The advantages of CCM are low current stresses and less EMI problem. Complete analysis and design considerations of the studied LED driver are discussed in detail. From simulation and experimental results, it can be observed that the presented driver features isolated topology, high power factor and high efficiency.

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