A single‐stage bridgeless LLC resonant converter with constant frequency control based LED driver

Abstract In this article, a single‐stage bridgeless LLC resonant converter with a constant frequency control method is proposed for a high‐brightness light‐emitting diode (LED) driver. LED strings require drivers with high power density and high efficiency. This article presents a novel LED driver c...

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Autores principales:	Jianguang Ma, Ying Sun, Liang Hu
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/8c0d632986bb4c27b662fe9c5013ea92
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id	oai:doaj.org-article:8c0d632986bb4c27b662fe9c5013ea92
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spelling	oai:doaj.org-article:8c0d632986bb4c27b662fe9c5013ea922021-11-08T12:55:44ZA single‐stage bridgeless LLC resonant converter with constant frequency control based LED driver1755-45431755-453510.1049/pel2.12198https://doaj.org/article/8c0d632986bb4c27b662fe9c5013ea922021-11-01T00:00:00Zhttps://doi.org/10.1049/pel2.12198https://doaj.org/toc/1755-4535https://doaj.org/toc/1755-4543Abstract In this article, a single‐stage bridgeless LLC resonant converter with a constant frequency control method is proposed for a high‐brightness light‐emitting diode (LED) driver. LED strings require drivers with high power density and high efficiency. This article presents a novel LED driver circuit topology based on switch integration and the switching controlled capacitor (SCC) technique. By combining the merits of a totem‐pole bridgeless boost PFC unit and a high frequency SCC‐LLC half‐bridge resonant converter, the proposed topology can achieve high efficiency. Due to the SCC‐LLC circuit topology structure, constant frequency control of the LLC resonant converter is achieved by the regulation of the equivalent resonant capacitance. The proposed novel LED driver topology can automatically achieve soft‐switching characteristics and a high power factor. The operating principle of different operation modes and the characteristics of the proposed LED driver are analysed in detail. Finally, to demonstrate the feature of the proposed topology, a 100 W/70 V laboratory prototype is built. The satisfactory experimental results correspond with the theoretical analysis and parameter design.Jianguang MaYing SunLiang HuWileyarticleElectronicsTK7800-8360ENIET Power Electronics, Vol 14, Iss 15, Pp 2507-2518 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Electronics TK7800-8360
spellingShingle	Electronics TK7800-8360 Jianguang Ma Ying Sun Liang Hu A single‐stage bridgeless LLC resonant converter with constant frequency control based LED driver
description	Abstract In this article, a single‐stage bridgeless LLC resonant converter with a constant frequency control method is proposed for a high‐brightness light‐emitting diode (LED) driver. LED strings require drivers with high power density and high efficiency. This article presents a novel LED driver circuit topology based on switch integration and the switching controlled capacitor (SCC) technique. By combining the merits of a totem‐pole bridgeless boost PFC unit and a high frequency SCC‐LLC half‐bridge resonant converter, the proposed topology can achieve high efficiency. Due to the SCC‐LLC circuit topology structure, constant frequency control of the LLC resonant converter is achieved by the regulation of the equivalent resonant capacitance. The proposed novel LED driver topology can automatically achieve soft‐switching characteristics and a high power factor. The operating principle of different operation modes and the characteristics of the proposed LED driver are analysed in detail. Finally, to demonstrate the feature of the proposed topology, a 100 W/70 V laboratory prototype is built. The satisfactory experimental results correspond with the theoretical analysis and parameter design.
format	article
author	Jianguang Ma Ying Sun Liang Hu
author_facet	Jianguang Ma Ying Sun Liang Hu
author_sort	Jianguang Ma
title	A single‐stage bridgeless LLC resonant converter with constant frequency control based LED driver
title_short	A single‐stage bridgeless LLC resonant converter with constant frequency control based LED driver
title_full	A single‐stage bridgeless LLC resonant converter with constant frequency control based LED driver
title_fullStr	A single‐stage bridgeless LLC resonant converter with constant frequency control based LED driver
title_full_unstemmed	A single‐stage bridgeless LLC resonant converter with constant frequency control based LED driver
title_sort	single‐stage bridgeless llc resonant converter with constant frequency control based led driver
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/8c0d632986bb4c27b662fe9c5013ea92
work_keys_str_mv	AT jianguangma asinglestagebridgelessllcresonantconverterwithconstantfrequencycontrolbasedleddriver AT yingsun asinglestagebridgelessllcresonantconverterwithconstantfrequencycontrolbasedleddriver AT lianghu asinglestagebridgelessllcresonantconverterwithconstantfrequencycontrolbasedleddriver AT jianguangma singlestagebridgelessllcresonantconverterwithconstantfrequencycontrolbasedleddriver AT yingsun singlestagebridgelessllcresonantconverterwithconstantfrequencycontrolbasedleddriver AT lianghu singlestagebridgelessllcresonantconverterwithconstantfrequencycontrolbasedleddriver
_version_	1718442260979253248

A single‐stage bridgeless LLC resonant converter with constant frequency control based LED driver

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