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

The Korean Institute of Power Electronics (전력전자학회)
권호 표지
DOI QR코드

DOI QR Code

Nonisolated Multichannel LED Current Balancing Scheme Using Coupled Inductor and Series Resonant Converter

결합인덕터와 직렬 공진을 이용한 비절연 다중 LED 전류 평형 기법

  • Shin, Yooyong (School of Energy Engineering, Kyungpook National University) ;
  • Hong, Daheon (School of Energy Engineering, Kyungpook National University) ;
  • Choi, Byungcho (School of Energy Engineering, Kyungpook National University) ;
  • Cha, Honnyong (School of Energy Engineering, Kyungpook National University)
  • Received : 2021.02.04
  • Accepted : 2021.04.07
  • Published : 2021.08.20
Download PDF
⟨ Previous Next ⟩

Abstract

A novel current balancing technique for multichannel light-emitting diode (LED) that uses a series resonance and coupled inductor is proposed in this paper. The proposed LED driver balances output currents through frequency control and enables zero-voltage switching. The proposed converter utilizes the charge balance condition of the resonant capacitor and the current sharing function of the coupled inductor to achieve whole LED current balancing without an additional controller. The proposed coupled inductor can integrate the current balancing function and the resonant inductor, so the power density can be increased by reducing the number of magnetic devices. A 40 W prototype is built to verify the validity of this LED driver, and the experimental results are successfully obtained.

Keywords

Acknowledgement

이 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임. (NRF-2021R1A2C2007879)

References

  1. Y. Lin, H. Chiu, Y. Lo, and C. Leng, "LED backlight driver circuit with dual-mode dimming control and current-balancing design," IEEE Transactions on Industrial Electronics, Vol. 61, No. 9, pp. 4632-4639, Sep. 2014. https://doi.org/10.1109/TIE.2013.2288234
  2. Y. Ye, K. W. E. Cheng, J. Lin, and D. Wang, "Single-switch multichannel current-balancing LED drive circuits based on optimized SC techniques," IEEE Transactions on Industrial Electronics, Vol. 62, No. 8, pp. 4761-4768, Aug. 2015. https://doi.org/10.1109/TIE.2015.2408813
  3. H. Kim, C. S. Yoon, D. Jeong, and J. Kim, "A single-inductor, multiple-channel current-balancing LED driver for display backlight applications," IEEE Transactions on Industry Applications, Vol. 50, No. 6, pp. 4077-4081, Nov./Dec. 2014. https://doi.org/10.1109/TIA.2014.2346707
  4. H. Chiu, Y. Lo, J. Chen, S. Cheng, C. Lin, and S. Mou, "A high-efficiency dimmable LED driver for low-power lighting applications," IEEE Transactions on Industrial Electronics, Vol. 57, No. 2, pp. 735-743, Feb. 2010. https://doi.org/10.1109/TIE.2009.2027251
  5. Q. Hu and R. Zane, "Minimizing required energy storage in off-line LED drivers based on series-input converter modules," IEEE Transactions on Power Electronics, Vol. 26, No. 10, pp. 2887-2895, Oct. 2011. https://doi.org/10.1109/TPEL.2010.2087772
  6. J. Zhang, L. Xu, X. Wu, and Z. Qian, "A precise passive current balancing method for multioutput LED drivers," IEEE Transactions on Power Electronics, Vol. 26, No. 8, pp. 2149-2159, Aug. 2011. https://doi.org/10.1109/TPEL.2010.2104332
  7. K. I. Hwu and W. Z. Jiang, "Nonisolated two-channel LED driver with automatic current balance and zero-voltage switching," IEEE Transactions on Power Electronics, Vol. 31, No. 12, pp. 8359-8370, Dec. 2016. https://doi.org/10.1109/TPEL.2016.2515088
  8. D. Do, H. Cha, B. L. Nguyen, and H. Kim, "Two-channel interleaved buck LED driver using current-balancing capacitor," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 6, No. 3, pp. 1306-1313, Sep. 2018. https://doi.org/10.1109/JESTPE.2018.2845858
  9. X. Qu, S. Wong, and C. K. Tse, "An improved LCLC current-source-output multistring LED driver with capacitive current balancing," IEEE Transactions on Power Electronics, Vol. 30, No. 10, pp. 5783-5791, Oct. 2015. https://doi.org/10.1109/TPEL.2014.2377244
  10. T. N. Gucin, B. Fincan, and M. Biberoglu, "A series resonant converter-based multichannel LED driver with inherent current balancing and dimming capability," IEEE Transactions on Power Electronics, Vol. 34, No. 3, pp. 2693-2703, Mar. 2019. https://doi.org/10.1109/tpel.2018.2838261
  11. X. Wu, Z. Wang, and J. Zhang, "Design considerations for dual-output quasi-resonant flyback LED driver with current-sharing transformer," IEEE Transactions on Power Electronics, Vol. 28, No. 10, pp. 4820-4830, Oct. 2013. https://doi.org/10.1109/TPEL.2012.2234480
  12. J. Zhang, J. Wang, and X. Wu, "A capacitor-isolated LED driver with inherent current balance capability," IEEE Transactions on Industrial Electronics, Vol. 59, No. 4, pp. 1708-1716, Apr. 2012. https://doi.org/10.1109/TIE.2011.2138111
  13. S. Choi and T. Kim, "Symmetric current-balancing circuit for LED backlight with dimming," IEEE Transactions on Industrial Electronics, Vol. 59, No. 4, pp. 1698-1707, Apr. 2012. https://doi.org/10.1109/TIE.2011.2138112
  14. R. Zhang and H. S. Chung, "Capacitor-isolated multistring LED driver with daisy-chained transformers," IEEE Transactions on Power Electronics, Vol. 30, No. 7, pp. 3860-3875, Jul. 2015. https://doi.org/10.1109/TPEL.2014.2343974
  15. J. Lee, H. Cha, D. Shin, K. Lee, D. Yoo, and J. Yoo, "Analysis and design of coupled inductors for two-phase interleaved DC-DC converters," Journal of Power Electronics, Vol. 13, No. 3, pp. 339-348, May 2013. https://doi.org/10.6113/JPE.2013.13.3.339
  16. J. W. Tang and S. K. Han, "A Si-FET-based high switching frequency three-level LLC resonant converter," Energies, Vol. 12, No. 16, Aug. 2019.
  17. N. Naseem and H. Cha, "Quad-active-bridge converter with current balancing coupled inductor for SST application," IEEE Transactions on Power Electronics, Vol. 36, No. 11, pp. 12528-12539, Nov. 2021. https://doi.org/10.1109/TPEL.2021.3076460
  18. U. Ahmad, H. Cha, and N. Naseem, "Integrated current balancing transformer based input-parallel output-parallel LLC resonant converter modules," IEEE Transactions on Power Electronics, Vol. 36, No. 5, pp. 5278-5289, May 2021. https://doi.org/10.1109/TPEL.2020.3026929