Design and Control of Single-stage LEDConverter with High Power Factor

This paper presents a single-stage LED converter with high power factor. The proposed converter utilizes a single-stage power circuit that combinesthe boost DC-DC converter topology and theflyback converter topology. The control of the proposed converter operates using critical conduction mode and fixed on-time voltage control techniques. In this way the proposed converter is much simpler than currentconventional LED converters. An operational principle and a design example of the proposed converter are explained, briefly. Also, it is shown through experimental results that the proposed converter built based on the design example has good performance for driving LEDs.