An MC³ LLC resonant light-emitting diode (LED) driver is a multi-channel constant current (MC³) output solution based on LLC resonance. Through an effective combination of multiple transformers and a DC block capacitor, this driver allows constant current outputs in multiple channels when the LED channels are unbalanced. This study considers a fuzzy self-tuning proportional integral derivative (PID) control strategy that allows for the self-tuning of PID parameters according to fuzzy inference rules designed using the relationship between the current gain and the switching frequency. Thus, when LED channels are unbalanced, the system allows a constant current output for each of the channels and controls the input voltage disturbances well. Simulation and experimental verifications are carried out, and a 20 W 4-channel constant current power supply design based on LLC resonance is obtained for the LED driver. This realizes soft-switching of the switching device, which reduces system loss and improves system efficiency. Moreover, the adjustment time of the proposed method is half that of fixed-parameter control methods, and the overshoot of the proposed method is smaller than that of fixed-parameter control methods. When compared with PID controllers with fixed parameters, the proposed method is more robust. When a system is disturbed, it recovers faster and has a smaller range of current fluctuation with the proposed method.

MC ³ LLC谐振发光二极管（LED）驱动器是多通道恒流（MC ³）基于LLC谐振的输出解决方案。通过有效结合多个变压器和一个隔直流电容器，该驱动器可以在LED通道不平衡时在多个通道中提供恒定电流输出。这项研究考虑了一种模糊自整定比例积分微分（PID）控制策略，该策略允许根据使用电流增益和开关频率之间的关系设计的模糊推理规则对PID参数进行自整定。因此，当LED通道不平衡时，系统允许为每个通道提供恒定电流输出，并很好地控制输入电压扰动。进行了仿真和实验验证，并为LED驱动器获得了基于LLC谐振的20 W 4通道恒流电源设计。这实现了交换设备的软切换，从而减少了系统损耗并提高了系统效率。此外，所提出的方法的调整时间是定参数控制方法的一半，并且所提出的方法的过冲比定参数控制方法的过冲小。与具有固定参数的PID控制器相比，该方法具有更强的鲁棒性。当系统受到干扰时，使用所提出的方法，它恢复得更快并且具有较小的电流波动范围。与具有固定参数的PID控制器相比，该方法具有更强的鲁棒性。当系统受到干扰时，使用所提出的方法，它恢复得更快并且具有较小的电流波动范围。与具有固定参数的PID控制器相比，该方法具有更强的鲁棒性。当系统受到干扰时，使用所提出的方法，它恢复得更快并且具有较小的电流波动范围。