著者

Yu-Liang Lin Cheng-Chien Kuo Chung-Ming Leng Chein-Chung Sun

出版者

The Institute of Electronics, Information and Communication Engineers

雑誌

IEICE Electronics Express (ISSN:13492543)

巻号頁・発行日

vol.19, no.16, pp.20220178, 2022-08-25 (Released:2022-08-25)

参考文献数

32

被引用文献数

2

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A LED driver with a high Power Factor (PF) under universal AC voltage input is investigated in this paper. The AC/DC buck converter with novel dual sampling loop feedback control is adopted to implement the LED driver application. When the main switch is on interval, the control loop does peak current sampling. When main switch is off interval, the control loop does average current sampling. Two control sampling loops are superimposed to regulate the main switch to adapt the AC input voltage and load alteration. Such a scheme can keep the characteristic of peak current control of fast response and avoid the control delay to bring about over current for damage LED. Compared with the conventional peak current control method, the proposed design does not need zero current detect winding and multiplier. Therefore, the circuit architecture of the proposed driver is cheaper. The proposed driver is applied to a 12W LED to analyze the operational principles and verify the practicality.