A Kind of New Electrolytic Capacitor-Less AC-DC LED Driver

Abstract:

This paper designs a kind of new electrolytic capacitor-less LED (light-emitting diode) driver, which converts the commercial ac voltage to a pulsating current with twice the line frequency driving high-brightness LEDs. As no electrolytic capacitor is used, this driver possesses the unique advantage of long lifetime to match with that of LEDs. A method of injecting the third and fifth harmonics into the input current to reduce the peak-to-average ratio of the output current is also proposed. A 25V, 0.35A output prototype is built and tested in the laboratory, and the experimental results are presented to verify the effectiveness of the electrolytic capacitor-less LED driver and its control method.

• Periodical: Applied Mechanics and Materials (Volumes 416-417)
• Pages: 2117-2122
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.416-417.2117
• Online since: September 2013
• Authors: Wan Li Chen, Zhao Ping Wang, Xue Feng Dong
• Keywords: Electrolytic Capacitor-Less AC-DC Driver, Flyback Converter, Leds, Power Factor Correction (PFC)

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