Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title LED Driver Compatible with Both Electronic and Magnetic Ballasts
Authors Hyun-Su Gu ; Yoon Choi ; Jeong-Il Kang ; Sang-Kyoo Han
DOI 10.6113/TKPE/2016.21.1.42
Page pp.42-48
ISSN 1229-2214
Keywords AC/DC conversion; Flyback converter; LED driver; Fluorescent lamp ballast
Abstract Light-emitting diode (LED) drivers are recently replacing fluorescent lamps; these drivers can operate adaptively with various ballasts without modifying and removing such ballasts. To satisfy these trends, a LED driver that is compatible with both electronic and magnetic ballasts is proposed in this study. Unlike conventional LED drivers, the proposed driver has a ballast recognition circuit and a mode selection circuit to operate ballasts at optimal conditions. Therefore, it features low voltage stress, high efficiency, and good compatibility with both electronic and magnetic ballasts. Moreover, it can be compatible with a wide selection of ballasts from various manufacturers. To confirm the validity of the proposed LED driver, results of the theoretical analysis and experimental verification performed on a 15 W-rated prototype are presented.