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

Qingqing He; Quanming Luo; Jian Huang; Chi Cao; Pengju Sun; Xiong Du

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

Vol. 20, No. 6, pp. 1616-1628, Nov. 2020

10.1007/s43236-020-00138-z

LED driver

AC square voltage bus

Parameter design

Multi-channel constant current

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%.

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Cite this article

[IEEE Style]

Q. He, Q. Luo, J. Huang, C. Cao, P. Sun, X. Du, "LCL‑T resonant network‑based modular multi‑channel constant‑current LED driver analysis and design," Journal of Power Electronics, vol. 20, no. 6, pp. 1616-1628, 2020. DOI: 10.1007/s43236-020-00138-z.

[ACM Style]

Qingqing He, Quanming Luo, Jian Huang, Chi Cao, Pengju Sun, and Xiong Du. 2020. LCL‑T resonant network‑based modular multi‑channel constant‑current LED driver analysis and design. Journal of Power Electronics, 20, 6, (2020), 1616-1628. DOI: 10.1007/s43236-020-00138-z.