Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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LCL-T resonant network-based modular multi-channel constant-current LED driver analysis and design

  • He, Qingqing (State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University) ;
  • Luo, Quanming (State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University) ;
  • Huang, Jian (State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University) ;
  • Cao, Chi (State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University) ;
  • Sun, Pengju (State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University) ;
  • Du, Xiong (State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University)
  • Received : 2020.03.14
  • Accepted : 2020.08.23
  • Published : 2020.11.20
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Abstract

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%.

Keywords

Acknowledgement

This work was supported by the National Natural Science Foundation of China under Grant 51577019 and by the graduate scientific research and innovation foundation of Chongqing, China, under Grant CYB18009.

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