PROJECT TITLE :

Analysis of the Integrated SEPIC-Flyback Converter as a Single-Stage Single-Switch Power-Factor-Correction LED Driver - 2016

ABSTRACT:

This paper proposes a replacement isolated single-stage single-switch power-issue-correction (S4 PFC) driver for supplying light-emitting diodes (LEDs) without electrolytic capacitor. In the proposed LED driver, the switch activates underneath zero current switching (ZCS) condition. Additionally, it turns on at a voltage less than its nominal voltage stress, and so, the switch capacitive flip-on loss decreases an excessive amount of extent. The leakage energy is absorbed, thus there are no voltage spikes across the switch when the switch turns off. In this paper, operating principles of the proposed driver are mentioned, and style issues are presented. Also, a laboratory prototype for supplying a 21 W/30 V LED module from 220 Vrms/50 Hz ac mains is implemented, and experimental results are presented to verify the theoretical analysis.