LCL-T resonant network-based modular multi-channel constant-current LED driver analysis and design

Multiple output LED drivers are necessary to achieve better performance and higher reliability in street lighting, tunnel lighting and LCD background lighting applications. Based on LCL-T constant-current characteristics, a modular multiple output LED driver is proposed in this paper. The LCL-T rect...

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Bibliographic Details
Published inJournal of power electronics Vol. 20; no. 6; pp. 1616 - 1628
Main Authors He, Qingqing, Luo, Quanming, Huang, Jian, Cao, Chi, Sun, Pengju, Du, Xiong
Format Journal Article
LanguageKorean
Published 2020
Subjects
Multi-channel constant current
AC square voltage bus
Parameter design
LED driver
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Summary:Multiple output LED drivers are necessary to achieve better performance and higher reliability in street lighting, tunnel lighting and LCD background lighting applications. Based on LCL-T constant-current characteristics, a modular multiple output LED driver is proposed in this paper. The LCL-T rectifiers are connected to the same voltage bus and work like current sources. However, since there are much higher voltage harmonics in the AC square bus voltage, it is very important to quantitatively analyze how these harmonics influence the precision of the output currents. In addition, all of the switches can achieve Zero Voltage Switching (ZVS) by proper design of the LCL-T network. Finally, a 200-W prototype with five channels is established with an efficiency of 92.25%.
Bibliography:KISTI1.1003/JNL.JAKO202032860047075
ISSN:1598-2092
2093-4718