Share This Article:

Integrated Off-Line Ballast for High Brightness LEDs with Dimming Capability

Abstract Full-Text HTML Download Download as PDF (Size:913KB) PP. 338-351
DOI: 10.4236/cs.2011.24047    5,166 Downloads   8,644 Views   Citations

ABSTRACT

This paper presents an off-line integrated full ballast to supply a 35W assembly of Power LEDs. The proposed solution integrates an input PFC stage (a flyback converter operating in DCM) and a DC-DC output converter (a buck converter) into a single switch power stage, operating with peak current control. As it will be shown, this control scheme maintains the current through the load constant, regardless of the instantaneous value of the DC link voltage. This issue allows the use of a small capacitor for the DC link, which enhances the overall system reliability. The complete ballast has full dimming capability, and all the analysis and design steps are presented, thus ensuring the fulfilling of the existing regulations. The novelty of the final solution comes from the simplicity and robustness of the control scheme in an integrated compact single-switch power stage. A final prototype of the ballast has been built and tested, and experimental results are shown in the last part of the paper. Finally, conclusions and future developments are shown.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

J. Garcia, A. Calleja, E. Corominas, D. Gacio, L. Campa and R. Díaz, "Integrated Off-Line Ballast for High Brightness LEDs with Dimming Capability," Circuits and Systems, Vol. 2 No. 4, 2011, pp. 338-351. doi: 10.4236/cs.2011.24047.

References

[1] M. Dyble, N. Narendran, A. Bierman and T. Klein, “Im-pact of Dimming White LEDs: Chromaticity Shifts Due to Different Dimming Methods,” 5th International Con-ference on Solid State Lighting, Bellingham, 1 August 2005. doi:10.1117/12.625924
[2] N. Narendran and Y. Gu, “Life of LED-Based White Light Sources,” IEEE Journal of Display Technology, Vol. 1, No 1, 2005, pp. 167-171. doi:10.1109/JDT.2005.852510
[3] J. Garcia, M. A. Dalla-Costa, J. Cardesin, J. M. Alonso and M. Ri-co-Secades, “Dimming of High-Brightness LEDs by Means of Luminous Flux Thermal Estimation,” IEEE Transactions on Power Electronics, Vol. 24, No. 2, 2009, pp. 1107-1114.
[4] J. Bielecki, A. S. Jwania; F. El Kha-tib and T. Poorman, “Thermal Considerations for LED Components in an Automotive Lamp,” 23rd Annual IEEE Semiconductor Thermal Measurement and Management Symposium, San Jose, 18-22 March 2007, pp. 37-43. doi:10.1109/STHERM.2007.352403
[5] C. C. Chen, C. Y. Wu, Y. M. Chen and T. F. Wu, “Sequential Color LED Backlight Driving System for LCD Panels,” IEEE Transactions on Power Electronics, Vol. 22, No. 3, 2007, pp. 919-925. doi:10.1109/TPEL.2007.897001
[6] M. Rico-Secades, A. J. Calleja, J. Ribas, E. L. Corominas, J. M. Alonso, J. Cardesín and J. García, “Evaluation of a Low-Cost Per-manent Emergency Lighting System Based on High Effi-ciency LEDs,” IEEE Transactions on Industry Applica-tions, Vol. 41, No. 5, 2005, pp. 1386-1390. doi:10.1109/TIA.2005.853389
[7] Y.-K. Lo, K.-H. Wu, K.-J. Pai and H.-J. Chiu, “Design and Implementation of RGB LED Drivers for LCD Backlight Modules,” IEEE Transactions on Industrial Electronics, Vol. 56, No. 12, 2009, pp. 4862-4871. doi:10.1109/TIE.2009.2026771
[8] H.-J. Chiu, Y.-K. Lo, J.-T. Chen, S.-J. Cheng, C.-Y. Lin, and S.-C. Mou, “A High-Efficiency Dimmable LED Driver for Low-Power Lighting Applications,” IEEE Transactions on Industrial Electronics, Vol. 57, No. 2, 2010, pp. 735-743. doi:10.1109/TIE.2009.2027251
[9] K. Zhou, J. G. Zhang, S. Yuvarajan and D. F. Weng, “Quasi-Active Power Factor Correction Circuit for HB LED Driver,” IEEE Transactions on Power Electronics, Vol. 23, No. 3, 2008, pp. 1410-1415. doi:10.1109/TPEL.2008.921184
[10] M. Rico-Secades, J. Garcia, J. Cardesin and A. J. Calleja, “Using Tapped In-ductor Converters as LED Drivers,” Conference Record of the 2006 IEEE Industry Applications Conference 41st IAS Annual Meeting, Tampa, 8-12 October 2006, pp. 1794-1800.
[11] X. Qu, S. Ch. Wong and Ch. K. Tse, “Isolated PFC Pre-Regulator for LED Lamps,” Proceed-ings of 34th Industrial Electronics Annual Conference, Orlando, 10-13 November 2008, pp. 1980-1987.
[12] Y. X. Qin, H. S. H. Chung, D. Y. Lin and S. Y. R. Hui, “Current Source Ballast for high Power Lighting Emitting Diodes without Electrolytic Capacitor,” Proceedings of 34th Industrial Electronics Annual Conference, Orlando, 10-13 November 2008, pp. 1968-1973,
[13] Y. Hu and M. M. Jovanovic, “LED Driver with Self-Adaptive Drive Voltage,” IEEE Transaction on Power Electronics, Vol. 23, No. 6, 2008, pp. 3116-3125. doi:10.1109/TPEL.2008.2004558
[14] Y. Fang; S.-H. Wong and L. L. Hok-Sun, “A Power Converter with Pulse-Level-Modulation Control for Driving High Brightness LEDs,” Proceedings of the Twenty- Fourth Annual IEEE Applied Power Electronics and Exposition Conference, Washington DC, 15-19 February 2009, pp. 577-581. doi:10.1109/APEC.2009.4802715
[15] D. Rand, B. Lehman and A. Shteynberg, “Issues, Models and Solu-tions for Triac Modulated Phase Dimming of LED Lamps,” Proceedings of the IEEE Power Electronics Specialists Conference 2007, Orlando, 17-21 June 2007, pp. 1398-1404.
[16] X. R. Xu and X. B. Wu, “High Dimming Ratio LED Driver with Fast Transient Boost Converter,” Proceedings of the IEEE Power Electronics Specialists Conference 2008, Rhodes, 15-19 June 2008, pp. 4192-4195.
[17] N. Prathyusha and D. S. Zinger, “An Effective LED Dimming Approach,” 2004 IEEE Industry Applications Conference, 39th IAS Annual Meeting, Seattle, 3-7 October 2004, pp. 1671-1676. doi:10.1109/IAS.2004.1348695
[18] D. Gacio, J. M. Alonso, J. Garcia, L. Campa, M. Crespo and M. Ri-co-Secades, “High Frequency PWM Dimming Technique for High Power Factor Converters in LED Lighting,” Proceedings of the Twenty-Fifth Annual IEEE Applied Power Electronics and Exposition Conference 2010, Palm Springs, 21-25 February 2010, pp. 743-749.
[19] D. Gacio, J. Alonso, J. Garcia, L. Campa, M. Crespo Ramos and M. Rico-Secades, “PWM Series Dimming for Slow-Dynamics HPF LED Drivers: The High Frequency Approach,” IEEE Transactions on Industrial Electronics, No. 99, p. 1. doi:10.1109/TIE.2011.2130503
[20] L. Gu, X. Ruan, M. Xu and K. Yao, “Means of Eliminating Electrolytic Capacitor in AC/DC Power Supplies for LED Lightings,” IEEE Transactions on Power Electronics, Vol. 24, No. 5, 2009, pp. 1399-1408. doi:10.1109/TPEL.2009.2016662
[21] J. Garcia, A. J. Calleja, E. L. Corominas, D. Gacio and J. Ribas, “Elec-tronic Driver without Electrolytic Capacitor for Dimming High Brightness LEDs,” 35th Annual Conference of the IEEE Industrial Electronics Society, Porto, 2-5 November 2009, pp. 3518-3513. doi:10.1109/IECON.2009.5415167
[22] J. Garcia, A. J. Calleja, E. L. Corominas, J. Ribas, L. Campa and R. E. Díaz, “Integrated Driver for Power LEDs,” 36th Annual Conference of the IEEE Industrial Electronics Society, Glendale, 2-5 November 2010, pp. 2578-2583. doi:10.1109/IECON.2010.5675150
[23] Luxeon LXK2 white LED datasheet, DS51, 2006. http://www.lumileds.com.

  
comments powered by Disqus

Copyright © 2018 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.