TY - JOUR
T1 - A high power factor bridgeless flyback PFC converter with synchronous rectifier
AU - Kim, Se Jin
AU - Song, Tae Sung
AU - Do, Hyun Lark
N1 - Publisher Copyright:
© 2015 Praise Worthy Prize S.r.l.- All rights reserved.
PY - 2015
Y1 - 2015
N2 - A high power factor bridgeless flyback power-factor-correction (PFC) converter with synchronous rectifier (SR) is proposed in this paper. By eliminating an input bridge diode, the total number of components in conduction path is reduced and thus overall efficiency is improved. In addition, by replacing output diodes with SR, the efficiency improvement is achieved due to the reduced conduction loss on the SR. Since the proposed converter operates in discontinuous- conduction-mode (DCM), the SR is turned off under zero-current-switching (ZCS) condition. Moreover, since the input average current always follows the peak input current in DCM, high power factor (PF) is achieved for a wide range AC input. The operational principle and a steady-state analysis of the proposed converter are provided in detail. In order to verify the theoretical analysis, experimental results based on a 60W prototype at a constant switching frequency of 70 kHz are presented.
AB - A high power factor bridgeless flyback power-factor-correction (PFC) converter with synchronous rectifier (SR) is proposed in this paper. By eliminating an input bridge diode, the total number of components in conduction path is reduced and thus overall efficiency is improved. In addition, by replacing output diodes with SR, the efficiency improvement is achieved due to the reduced conduction loss on the SR. Since the proposed converter operates in discontinuous- conduction-mode (DCM), the SR is turned off under zero-current-switching (ZCS) condition. Moreover, since the input average current always follows the peak input current in DCM, high power factor (PF) is achieved for a wide range AC input. The operational principle and a steady-state analysis of the proposed converter are provided in detail. In order to verify the theoretical analysis, experimental results based on a 60W prototype at a constant switching frequency of 70 kHz are presented.
KW - Bridgeless converter
KW - Flyback converter
KW - Power-factor-correction (PFC)
KW - Synchronous rectifier (SR)
UR - https://www.scopus.com/pages/publications/84957803059
U2 - 10.15866/iree.v10i5.7193
DO - 10.15866/iree.v10i5.7193
M3 - Article
AN - SCOPUS:84957803059
SN - 1827-6660
VL - 10
SP - 569
EP - 577
JO - International Review of Electrical Engineering
JF - International Review of Electrical Engineering
IS - 5
ER -