An E-capless AC-DC CRM Flyback LED Driver with Variable On-time Control


Vol. 17, No. 2, pp. 315-322, Mar. 2017
10.6113/JPE.2019.17.2.315


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 Abstract

LED is a promising new generation of green lighting with the advantages of high efficiency, good optical performance, long lifetime and environmental friendliness. A pulsating current can be used to drive LEDs. However, current with a high peak-to-average ratio is unfavorable for LEDs. A novel control scheme for the ac-dc critical conduction mode (CRM) flyback LED driver is proposed in this paper. By using the input voltage, output voltage and average output current to control the turn-on time of the switch, the peak-to-average ratio of the output current can be reduced. The operation principle is analyzed and an implementation circuit is put forward. Experimental results show the effectiveness of the proposed scheme.


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Cite this article

[IEEE Style]

K. Yao, X. Bi, S. Yang, "An E-capless AC-DC CRM Flyback LED Driver with Variable On-time Control," Journal of Power Electronics, vol. 17, no. 2, pp. 315-322, 2017. DOI: 10.6113/JPE.2019.17.2.315.

[ACM Style]

Kai Yao, Xiaopeng Bi, and Siwen Yang. 2017. An E-capless AC-DC CRM Flyback LED Driver with Variable On-time Control. Journal of Power Electronics, 17, 2, (2017), 315-322. DOI: 10.6113/JPE.2019.17.2.315.