Abstract
This paper proposes a high-performance isolated single-ended primary inductor converter (SEPIC) that is integrated with a non-dissipative snubber for a light-emitting diode (LED) driver. The proposed LED driver employs the snubber circuit to minimize any switching overvoltage caused by parasitic leakage inductance of the high-frequency transformer in the isolated SEPIC converter. This paper also presents a detail theoretical analysis of the proposed LED driver including its operating modes and design calculation. The experimental results of the proposed LED driver at the rated power of 18 W shows that it has a high-power factor, low harmonics, employs non-electrolytic capacitors, low switching stress, high reliability and high efficiency.
Highlights
A light-emitting diode (LED) requires an LED driver to convert ac power to dc power
The risk of circuit failure in an LED driver may be caused by failure of electrolytic capacitor, switching overvoltage, and overcurrent
This paper proposes an LED driver that is based on a highperformance isolated single-ended primary inductor converter (SEPIC) that utilizes a non-dissipative DRS snubber [14]
Summary
This work presented was supported in part by Universiti Tenaga Nasional BOLD2020 Grant under Project Code RJO10517844/110 and Ministry of Science & Technology under National Key R&D Program of China, under Grant 2021YFE0108600
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