This article proposes a linear PFC regulator with a light flicker compensating circuit for LED lighting applications. The proposed circuit is small in size because it includes no reactors or electrolytic capacitors. The light flicker compensating circuit, which is connected in parallel to the LED string, consists of four ceramic capacitors and diodes. These capacitors are operated in series in the charge state and in parallel in the discharge state by using a diode network circuit. Therefore, an external controller and large capacitors are not required. The proposed circuit is experimentally validated using a 9 W prototype. From the experimental results, it is found that the power fluctuation of the LED string is less than the JIS and JLMA limitations, and the power factor is 0.95. In addition, the power loss is analyzed at an efficiency of 89.4% for the prototype circuit. Also, by modulating the current regulator, sinusoidal input current can be achieved. The second proposed circuit is experimentally validated using a 7.5 W prototype, and the power factor and input current distortion are found to be 0.999 and 2.1%, respectively.

中文翻译：

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通过调制电流调节器对具有闪烁补偿电路和高功率因数操作的线性AC LED驱动器进行实验验证

本文提出了一种用于LED照明应用的带有闪烁补偿电路的线性PFC稳压器。提议的电路尺寸小，因为它不包含电抗器或电解电容器。与LED灯串并联的闪烁补偿电路由四个陶瓷电容器和二极管组成。通过使用二极管网络电路，这些电容器在充电状态下串联工作，在放电状态下并联工作。因此，不需要外部控制器和大电容器。所提出的电路使用9 W原型进行了实验验证。从实验结果可以发现，LED串的功率波动小于JIS和JLMA限制，功率因数为0.95。此外，功率损耗的分析效率为89。原型电路为4％。同样，通过调制电流调节器，可以实现正弦输入电流。使用7.5 W原型对第二个提议的电路进行了实验验证，发现功率因数和输入电流失真分别为0.999和2.1％。