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%.

中文翻译：

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基于LCL-T谐振网络的模块化多通道恒流LED驱动分析与设计

需要多输出 LED 驱动器才能在街道照明、隧道照明和 LCD 背景照明应用中实现更好的性能和更高的可靠性。基于LCL-T恒流特性，本文提出了一种模块化多输出LED驱动器。LCL-T 整流器连接到相同的电压总线并像电流源一样工作。但是，由于交流方母线电压中存在较高的电压谐波，因此定量分析这些谐波如何影响输出电流的精度非常重要。此外，通过适当设计 LCL-T 网络，所有开关均可实现零电压开关 (ZVS)。最后，建立了具有 92.25% 效率的具有五个通道的 200-W 原型。