Browse > Article
http://dx.doi.org/10.6113/JPE.2016.16.5.1661

A Novel Zero-Crossing Compensation Scheme for Fixed Off-Time Controlled High Power Factor AC-DC LED Drivers  

Chang, Changyuan (School of Integrated Circuits, Southeast University)
Sun, Hailong (School of Integrated Circuits, Southeast University)
Zhu, Wenwen (School of Integrated Circuits, Southeast University)
Chen, Yao (School of Integrated Circuits, Southeast University)
Wang, Chenhao (School of Integrated Circuits, Southeast University)
Publication Information
Journal of Power Electronics / v.16, no.5, 2016 , pp. 1661-1668 More about this Journal
Abstract
A fixed off-time controlled high power factor ac-dc LED driver is proposed in this paper, which employs a novel zero-crossing-compensation (ZCC) circuit based on a fixed off-time controlled scheme. Due to the parasitic parameters of the system, the practical waveforms have a dead region. By detecting the zero-crossing boundary, the proposed ZCC circuit compensates the control signal VCOMP within the dead region, and is invalid above this region. With further optimization of the parameters KR and Kτ of the ZCC circuit, the dead zone can be eliminated and lower THD is achieved. Finally, the chip is implemented in HHNEC 0.5μm 5V/40V HVCMOS process, and a prototype circuit, delivering 7~12W of power to several 3-W LED loads, is tested under AC input voltage ranging from 85V to 265V. The test results indicate that the average total harmonic distortion (THD) of the entire system is approximately 10%, with a minimum of 5.5%, and that the power factor is above 0.955, with a maximum of 0.999.
Keywords
Fixed Off-Time; LED Driver; Power Factor Correction; Total Harmonic Distortion; Zero-Crossing Compensation;
Citations & Related Records
연도 인용수 순위
  • Reference
1 M. S. Shur, and R. Zukauskas, "Solid-state lighting: Toward superior illumination," Proceedings of the IEEE, Vol. 93, No. 10, pp. 1691-1703, Oct. 2005.   DOI
2 M. Wendt and J. -W. Andriesse, "LEDs in real lighting applications: From niche markets to general lighting," in Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting, pp. 2601-2603, 2006.
3 S. Muthu, F. J. P. Schuurmans, and M. D. Pashley, "Red, green, and blue LEDs for white light illumination," IEEE J. Sel. Topics Quantum Electron., Vol. 8, No. 2, pp. 333-338, Mar./Apr. 2002.   DOI
4 X. Wu, J. Yang, J. Zhang, and Z. M. Qian, "Variable on-time (VOT)-controlled critical conduction mode buck pfc converter for high-input AC/DC HB-LED lighting applications," IEEE Trans. Power Electron., Vol. 27, No. 11, pp. 4530-4539, Sep. 2012.   DOI
5 J. Sun, "On the zero-crossing distortion in single-phase PFC converters," IEEE Trans. Power Electron., Vol. 19, No. 3, pp. 685-692, May 2004.   DOI
6 ENERGY STAR® Program Requirements for Single Voltage External AC-DC and AC-AC Power Supplie: Eligibility Criteria Version 2.0. http://www.energystar.gov/ia/partners/prod_development/revisions/downloads/eps_spec_v2.pdf, Jul. 23, 2008.
7 X. Xie, C. Zhao and L. Zheng, and & S. Liu, "An improved buck PFC converter with high power factor," IEEE Trans. Power Electron., Vol. 28, No. 5, pp. 2277-2284, May 2013.   DOI
8 Y. Li, Y. Yang, Z. Zhu, and W. Qiang, "Zero-crossing distortion analysis in one cycle controlled boost PFC for low THD," in Proc. ASICON, pp. 661-664. 2011.
9 K. D. Gussemé, D. M. Van de Sype, A. P. Van den Bossche, and J. A. Melkebeek, "Input-current distortion of CCM boost PFC converters operated in DCM," IEEE Trans. Ind. Electron., Vol. 54, No. 2, pp.858-865, Apr. 2007.   DOI
10 L. Huber, L. Gang, and M. Jovanovic, "Design-oriented analysis and performance evaluation of buck pfc front-end," IEEE Trans. power Electron., Vol. 25, No. 1, pp. 85-94, Jan. 2010.   DOI
11 J. T. Hwang, M. S. Jung, D. H. Kim, J. H. Lee, M. H. Jung, and J. H. Shin, "Off-the-line primary side regulation LED lamp driver with single-stage PFC and TRIAC dimming using LED forward voltage and duty variation tracking control," IEEE J. Solid-State Circuits, Vol. 47, No.12, pp. 278-280, Dec. 2013.
12 H. H. Chou, Y. S. Hwang, and J. J. Chen, "An adaptive output current estimation circuit for a primary-side controlled LED driver," IEEE Trans. Power Electron., Vol. 28, No. 10, pp. 4811-4819, Oct. 2013.   DOI
13 S. Jung and G. Cho, "Transformer coupled recycle snubber for high-efficiency offline isolated LED driver with on-chip primary-side power regulation," IEEE Trans. Ind. Electron., Vol. 61, No. 12, pp. 6710-6719, Dec. 2014.   DOI