Next Article in Journal
Wearable Triband E-Shaped Dipole Antenna with Low SAR for IoT Applications
Previous Article in Journal
Improved Heart-Rate Measurement from Mobile Face Videos
Previous Article in Special Issue
Heterogeneous Integration of GaN and BCD Technologies
Article Menu

Export Article

Open AccessArticle

Optimization of a Series Converter for Low-Frequency Ripple Cancellation of an LED Driver

1
LEMUR Group, Department of Electrical Engineering, University of Oviedo, 33204 Gijon, Spain
2
ce3i2 Group, Department of Electrical Engineering, University of Oviedo, 33204 Gijon, Spain
3
GEDRE Group, Universidade Federal de Santa Maria, Santa Maria, RS 97010, Brazil
4
GSEC Group, Universidade Federal de Santa Maria, Santa Maria, RS 97010, Brazil
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(6), 664; https://doi.org/10.3390/electronics8060664
Received: 8 May 2019 / Revised: 31 May 2019 / Accepted: 10 June 2019 / Published: 12 June 2019
(This article belongs to the Special Issue Latest Developments in LED Drivers)
  |  
PDF [3744 KB, uploaded 12 June 2019]
  |  

Abstract

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 D C link, therefore increasing the lifespan and reliability of the driver. As a consequence of having a relatively small capacitance, the D C link operates with a large Low-Frequency ( L F ) 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 A C power arising from the L F 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. View Full-Text
Keywords: LED driver; lighting electronics; LF ripple cancellation; single-phase converter LED driver; lighting electronics; LF ripple cancellation; single-phase converter
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

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.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Electronics EISSN 2079-9292 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top