TY - JOUR
T1 - A two-stage output current Ripple-Free Flyback-Buck AC-DC LED driver with high power factor
AU - Song, Tae Sung
AU - Lee, Sin Woo
AU - Do, Hyun Lark
N1 - Publisher Copyright:
© 2016 Praise Worthy Prize S.r.l. - All rights reserved.
PY - 2016
Y1 - 2016
N2 - A two-stage output current ripple-free flyback-buck AC-DC LED driver with high power factor is presented. The first stage is a flyback power factor correction (PFC) converter and the second stage is a ripple-free zero-voltage-switching (ZVS) synchronous buck converter. Nearly unity input power factor can be obtained by using a flyback PFC converter. In the second stage, the output capacitor is eliminated because the output current ripple is completely removed by utilizing additional circuit composed of a coupled inductor, a series inductor, and a series capacitor. Thus, the proposed circuit is suitable to long-lifespan LED driver. Moreover, by using synchronous switch, ZVS condition is satisfied in the main switches and also the reverse recovery problems in the body diode of switch are solved. Therefore, the efficiency, lifespan and the stability for LED driver is improved. A prototype LED driver for 80W is built up to verify theoretical analysis and experiment results are presented.
AB - A two-stage output current ripple-free flyback-buck AC-DC LED driver with high power factor is presented. The first stage is a flyback power factor correction (PFC) converter and the second stage is a ripple-free zero-voltage-switching (ZVS) synchronous buck converter. Nearly unity input power factor can be obtained by using a flyback PFC converter. In the second stage, the output capacitor is eliminated because the output current ripple is completely removed by utilizing additional circuit composed of a coupled inductor, a series inductor, and a series capacitor. Thus, the proposed circuit is suitable to long-lifespan LED driver. Moreover, by using synchronous switch, ZVS condition is satisfied in the main switches and also the reverse recovery problems in the body diode of switch are solved. Therefore, the efficiency, lifespan and the stability for LED driver is improved. A prototype LED driver for 80W is built up to verify theoretical analysis and experiment results are presented.
KW - Buck Converter
KW - LED Driver
KW - Output Current Ripple
KW - Synchronous Switch
KW - Zero-Voltage-Switching)
UR - https://www.scopus.com/pages/publications/84965160977
U2 - 10.15866/iree.v11i1.7852
DO - 10.15866/iree.v11i1.7852
M3 - Article
AN - SCOPUS:84965160977
SN - 1827-6660
VL - 11
SP - 1
EP - 8
JO - International Review of Electrical Engineering
JF - International Review of Electrical Engineering
IS - 1
ER -