전력전자학회논문지 (The Transactions of the Korean Institute of Power Electronics)

  • 제20권2호
  • /
  • Pages.122-129
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  • 2015
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  • 1229-2214(pISSN)
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  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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저 전압스트레스 및 다채널 전류 평형을 위한 Floating 전압 스택형 단일스위치 LED 구동회로

Floating Voltage Stacked LED Driver for Low Voltage Stress and Multi-channel Current Balancing

  • Hwang, Won-Sun (School of Electrical Eng., Kookmin Univ.) ;
  • Hwang, Sang-Soo (School of Electrical Eng., Kookmin Univ.) ;
  • Kang, Jeong-Il (Visual Display, Samsung Electronics Co., Ltd.) ;
  • Han, Sang-Kyoo (School of Electrical Engineering, College of Electrical Engineering and Computer Science, Kookmin University)
  • 투고 : 2014.10.14
  • 심사 : 2014.12.31
  • 발행 : 2015.04.20
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초록

In this study, we propose a low voltage stress and cost-effective light emitting diode (LED) driver capable of multi-channel current balancing. Conventional LED drivers require as many boost converters as the number of LED channels, whereas the proposed LED driver requires only one buck converter and several balancing capacitors instead of several expensive boost converters. Additionally, while the components of the boost converter have high voltage stress and depend on the LED driving voltage, components of the proposed driver have about one-half of the voltage stress across all components. The proposed driver exhibits high reliability and cost effectiveness because it only uses few DC blocking capacitors with no additional active devices to balance the current of multi-channel LEDs. The proposed driver exhibits high reliability and cost effectiveness. The validity of the proposed driver is confirmed through a theoretical analysis. An explanation of the design considerations and experimental results were obtained using a prototype applicable to a 46" LED-TV.

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참고문헌

  1. L. Y. Pan, S. C. Chang, M. Y. Liao, and Y. T. Lin, "The future development of global LCD TV industry," in Proceeding of PICMET, pp. 1818-1821, Aug. 2007.
  2. F. Xiaoyun, L. Xiaojian, and W. Yan, "Research and analysis of the design development and perspective technology for LED lighting products," in Proceeding of CAID&CD, pp. 1330-1334, Nov. 2009
  3. S. H. Cho, S. K. Han, C. W. Roh, S. S. Hong, S. C. Sakong G. H. Kwon, and H. B. Lee, "Design and application of CCFL drive inverter transformer for LCD backlight," Transactions of the Korean Institute of Power Electronics, pp. 96-102, Apr. 2008.
  4. I. H. Oh, "A single-stage power converter for a large screen LCD back-lighting," in Proc. IEEE APEC, pp. 1058-1063, Mar. 2006.
  5. C. C. Chen, C. Y. Wu, and T. F. Wu, "LED back-light driving system for LCD panels," in Proc. IEEE APEC, pp. 381-385, Mar. 2006.
  6. H. J. Chiu and S. J. Cheng, "LED backlight driving system for large-scale LCD panels," IEEE Trans. Ind. Electron., Vol. 54, pp. 2751-2760, Aug. 2007. https://doi.org/10.1109/TIE.2007.899938
  7. S. Muthu, F. J. Schuumans, and M. D. Pashley, "Red, green, and blue LEDs for white light illumination," IEEE Trans. on Quantum Electronics, Vol 8, pp. 333-338, Apr. 2002. https://doi.org/10.1109/2944.999188
  8. H. Huang, "Designing and LLC resonant half-bridge power converter," 2010 Texas Instruments Power Supply Design Seminar, 2010, SEM1900 Topic 3, TI Literature NO. SLUP263.
  9. X. Wang., F. Tian., and I. Batarseh., "High efficiency parallel post regulator for wide range input dc-dc converter," in IEEE Transactions, Power Electronics, Vol. 23, No. 2, pp. 852-858, Mar. 2008. https://doi.org/10.1109/TPEL.2007.915158
  10. G. Levin., "A new secondary side post regulator (SSPR) PWM controller for multiple output power supplies," Applied Power Electronics Conference and Exposition, Vol. 2, pp. 736-742, Mar. 1995.
  11. J. H. Jung, J. M. Choi, and J. G. Kwon, "Design methodology for transformers including integrated and center-tapped structures for LLC resonant converters," IEEE Transaction on Journal of Power Electronics, Vol. 9, No. 2, pp. 215-223, Jan. 2009.
  12. W. Roberts, Erickson, and D. Maksinmovic, "Fundamentals of power electronics ;2nd edition," Kluwer Academic, pp. 705-721, 2001.
  13. B. Y. Lee, F. C. Zhang, A. J, and G. Huang, "LLC resonant converter for front end DC/DC conversion," in Proceeding of APEC, Vol. 2, pp. 1108-1112, Mar. 2002.
  14. S. Choi and T. Kim, "Symmetric current-balancing circuit for LED backlight with dimming," IEEE Trans. Industrial Electronics, Vol. 59, No. 4, pp. 1698-1707, Apr. 2012. https://doi.org/10.1109/TIE.2011.2138112
  15. S. H. Lee, S. H. Cho, S. S. Hong, C. W. Roh, H. B. Lee, D. S. Oh, and S. K. Han, "A new current-balancing multi-channel LED driver for a large screen LCD backlight unit," Transactions of the Korean Institute of Power Electronics, pp. 111-118, Apr. 2010.