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Comparison of Dc-Dc SEPIC, CUK and Flyback Converters Based LED Drivers L&E 28 (1) 2020

Light & Engineering 28 (1)

Volume 28
Date of publication 02/20/2020
Pages 99–107

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Comparison of Dc-Dc SEPIC, CUK and Flyback Converters Based LED Drivers L&E 28 (1) 2020
Articles authors:
Erdal Sehirli

Erdal Sehirli, received his B. Sc. degrees from Gazi University and Istanbul Technical University, in 2006 and 2016 respectively, and the M. Sc. degrees and Ph.D. from Kocaeli University, Kocaeli, Turkey, in 2009, 2016 and 2017. He is a currently working as Ph.D. Lecturer in Kastamonu University, Electrical-Electronics Engineering. His current research interests include LED drivers, power electronics, electrical machines and drives, voltage source rectifiers and nonlinear control

Abstract:
This paper presents the comparison of LED driver topologies that include SEPIC, CUK and FLYBACK DC-DC converters. Both topologies are designed for 8W power and operated in discontinuous conduction mode (DCM) with 88 kHz switching frequency. Furthermore, inductors of SEPIC and CUK converters are wounded as coupled. Applications are realized by using SG3524 integrated circuit for open loop and PIC16F877 microcontroller for closed loop. Besides, ACS712 current sensor used to limit maximum LED current for closed loop applications. Finally, SEPIC, CUK and FLYBACK DC-DC LED drivers are compared with respect to LED current, LED voltage, input voltage and current. Also, advantages and disadvantages of all topologies are concluded.
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