A Comparative Study of Efficient Offline Single-Stage AC-DC LED Lighting Drivers Across Various Output Ranges

초록

A comparative study is presented on the efficiency of an offline single-stage AC-DC LED driver for various LED strings. To ensure a fair comparison among different types of power converters, averaged switch models of non-isolated LED drivers, based on peak current control, are employed for buck, buck-boost, and boost converters. The averaged switch model allows for easy determination of performance metrics, such as power factor (PF), total harmonic distortion (THD), and output power (POUT). Additionally, it provides a fair means of comparing performance by altering the number of LED strings used with different types of power converters. In this paper, the power boundary of LED strings for each type of power converter is clearly defined, given a constant AC input voltage.

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