Optimization of a Series Converter for Low-Frequency Ripple Cancellation of an LED Driver
LEMUR Group, Department of Electrical Engineering, University of Oviedo, 33204 Gijon, Spain
ce3i2 Group, Department of Electrical Engineering, University of Oviedo, 33204 Gijon, Spain
GEDRE Group, Universidade Federal de Santa Maria, Santa Maria, RS 97010, Brazil
GSEC Group, Universidade Federal de Santa Maria, Santa Maria, RS 97010, Brazil
Author to whom correspondence should be addressed.
Received: 8 May 2019 / Revised: 31 May 2019 / Accepted: 10 June 2019 / Published: 12 June 2019
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In this paper, the optimization of the power and control stages of a previously proposed topology for an off-line LED electronic driver is presented. The full system avoids the use of electrolytic capacitors at the
link, therefore increasing the lifespan and reliability of the driver. As a consequence of having a relatively small capacitance, the
link operates with a large Low-Frequency (
) voltage ripple. This work presents a design optimization for the power and control stages of a current-fed bidirectional buck converter, operating as the LED current control stage. As this block processes only the
power arising from the
voltage ripple, it can increase the system efficiency against the typical two-stage solution. In the original proposal, the main drawback was the high inductor losses due to the resulting large inductor currents and large inductance value. The proposed optimization ensures an enhanced design of the inductor while keeping a constant current through the LEDs. A new optimization methodology is proposed and the theoretical results have been validated in a built prototype for a 40 W LED lamp.
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MDPI and ACS Style
Garcia, J.; Saeed, S.; Quintana, P.; Cardesin, J.; Georgious, R.; Dalla Costa, M.A.; Camponogara, D. Optimization of a Series Converter for Low-Frequency Ripple Cancellation of an LED Driver. Electronics 2019, 8, 664.
Garcia J, Saeed S, Quintana P, Cardesin J, Georgious R, Dalla Costa MA, Camponogara D. Optimization of a Series Converter for Low-Frequency Ripple Cancellation of an LED Driver. Electronics. 2019; 8(6):664.
Garcia, Jorge; Saeed, Sarah; Quintana, Pablo; Cardesin, Jesus; Georgious, Ramy; Dalla Costa, Marco A.; Camponogara, Douglas. 2019. "Optimization of a Series Converter for Low-Frequency Ripple Cancellation of an LED Driver." Electronics 8, no. 6: 664.
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