This paper deals with a power factor corrected (PFC) flyback converter for high‐power light emitting diode lighting applications. This flyback converter is designed to operate in critical conduction mode to achieve improved power quality at universal AC mains and high efficiency with the low component count. The converter is analyzed using state‐space analysis with closed‐loop stability under varying input and output conditions. The PFC converter is designed and implemented with wide input and wide output variations. The performance of the prototype is also investigated for improved power quality such as power factor and harmonics distortion of AC mains current at universal AC mains of 85 to 265 V. The achieved efficiency of this converter is 92% and total harmonic distortion is less than 6% over universal AC mains for a prototype of 100 W, which are much improved results as compared to discontinuous conduction mode operation of the same converter.

中文翻译：

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高功率LED照明中的高效宽输入宽输出CrCM反激转换器

本文介绍了一种针对大功率发光二极管照明应用的功率因数校正（PFC）反激转换器。该反激式转换器设计为在临界导通模式下工作，以提高通用交流电源的电能质量，并以较少的组件数实现高效率。在变化的输入和输出条件下，使用具有闭环稳定性的状态空间分析对转换器进行分析。PFC转换器的设计和实现具有宽输入和宽输出变化。还研究了原型的性能，以改善电能质量，例如在85至265 V通用交流电源上的交流电源电流的功率因数和谐波失真。该转换器的效率为92％，总谐波失真小于6对于100 W的原型，比通用交流市电高出％，