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A Two-Stage Output Current Ripple-Free Flyback-Buck AC-DC LED Driver with High Power Factor


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DOI: https://doi.org/10.15866/iree.v11i1.7852

Abstract


A two-stage output current ripple-free flyback-buck AC-DC LED driver with high power factor is presented. The first stage is a flyback power factor correction (PFC) converter and the second stage is a ripple-free zero-voltage-switching (ZVS) synchronous buck converter. Nearly unity input power factor can be obtained by using a flyback PFC converter. In the second stage, the output capacitor is eliminated because the output current ripple is completely removed by utilizing additional circuit composed of a coupled inductor, a series inductor, and a series capacitor. Thus, the proposed circuit is suitable to long-lifespan LED driver. Moreover, by using synchronous switch, ZVS condition is satisfied in the main switches and also the reverse recovery problems in the body diode of switch are solved. Therefore, the efficiency, lifespan and the stability for LED driver is improved. A prototype LED driver for 80W is built up to verify theoretical analysis and experiment results are presented.
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Keywords


Buck Converter; LED Driver; Output Current Ripple; Zero-Voltage-Switching); Synchronous Switch

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References


Q. Wang, Z. Deng, J. Chen, and D. Ma, “Manipulating the microcavity structure for highly efficient inverted top-emitting organic light-emitting diodes: simulation and experiment,” IEEE Trans. Power Electron., vol. 57, no. 9, pp. 2221-2226, Sep. 2010.
http://dx.doi.org/10.1109/ted.2010.2055311

H.T. Chen, W. C. H. Choy, and S. Y. (Ron) Hui, “Characterization, modeling, and analysis of organic light-Emitting diodes with different structures,” IEEE Trans. Power Electron., vol. 31, no. 1, pp. 581-592, Jan. 2016.
http://dx.doi.org/10.1109/tpel.2015.2403618

D. Gacio, J. M. Alonso, J. Garcia, L. Campa, M. J. Crespo, and M. R. Secades, “PWM series dimming for slow-dynamics HPF LED drivers: the high-frequency approach,” IEEE Trans. Power Electron., vol. 59, no. 4, pp. 1717-1727, Apr. 2012.
http://dx.doi.org/10.1109/tie.2011.2130503

S. Y. Chen, Z. R. Li, and C. L. Chen, “Analysis and design of single-stage AC/DC LLC resonant converter,” IEEE Trans. Ind. Electron., vol. 59, no. 3, pp. 1538-1544, Mar. 2012.
http://dx.doi.org/10.1109/tie.2011.2161649

S. C. Moon, G.-B. Koo, and G.-W. Moon, “A new control method of interleaved single-stage flyback AC–DC converter for outdoor LED lighting systems,” IEEE Trans. Power Electron., vol. 28, no. 8, pp. 4051-4062, Aug. 2013.
http://dx.doi.org/10.1109/tpel.2012.2229471

X. Xie, J. Wang, C. Zhao, Q. Lu, and S. Liu, “A novel output current estimation and regulation circuit for primary side controlled high power factor single-stage flyback LED driver,” IEEE Trans. Power Electron., vol.27, no.11, pp.4602-4612, Nov. 2012.
http://dx.doi.org/10.1109/tpel.2012.2190523

X. Wu, Z. Wang, and J. Zhang, “Design considerations for dual-output quasi-resonant flyback LED driver with current- sharing transformer,” IEEE Trans. Power Electron., vol.28, no.10, pp.4820-4830, Oct. 2013.
http://dx.doi.org/10.1109/tpel.2012.2234480

X. Qu, S.-C Wong, and C. K. Tse, “An improved LCLC current source output multi-string LED driver with capacitive current balance,” IEEE Trans. Power Electron., vol.PP, no.99, pp.xx,yy.
http://dx.doi.org/10.1109/tpel.2014.2377244

Y. Wang, Y. Guan, D. Xu, and, W. Wang, “A CLCL resonant DC/DC converter for two-stage LED driver system,” IEEE Trans. Ind. Electron., vol.PP, no.99, pp.xx,yy.
http://dx.doi.org/10.1109/tie.2015.2511161

Y. Wang, Y. Guan, X. Liang, W. Wang, and, D. Xu, “Two-stage LED street lighting system based on a novel single-stage AC/DC converter,” IET Proc. Power Electron., vol. 7, no. 6, pp. 1375– 1383, Jul. 2013.
http://dx.doi.org/10.1049/iet-pel.2013.0540

F. Zhang, J. Ni, and, Y. Yu, “High power factor AC–DC LED driver with film capacitors,” IEEE Trans. Power Electron., vol. 28, no. 10, pp. 4831-4840, Oct. 2013.
http://dx.doi.org/10.1109/tpel.2012.2233498

G. Capodivacca, P. Milanesi, and, A. Scenini, “Integrated buck LED driver with application specific digital architecture,” in proc. ESSCIRC, 2013, pp. 343 – 346.
http://dx.doi.org/10.1109/esscirc.2013.6649143

Z. Iqbal, U. Nasir, M.T. Rasheed, and K. Munir, “A comparative analysis of synchronous buck, isolated buck and buck converter,” IEEE International Conference on Environment (EEEIC), 2015, pp. 992 – 996.
http://dx.doi.org/10.1109/eeeic.2015.7165299

K. Rahimi1, A. N. Motlagh, and M. Pakdel, “A novel soft-switched synchronous buck converter,” IEEE Conference on Vegicle Power (VPPC), 2009, pp. 1345 – 1351.
http://dx.doi.org/10.1109/vppc.2009.5289448

H. L. Do, “Zero-voltage-switching synchronous buck converter with a coupled inductor,” IEEE Trans. Ind. Electron., vol. 58, no. 8, pp. 3440-3447, Aug. 2011.
http://dx.doi.org/10.1109/tie.2010.2084973

H. L. Do, “Zero-voltage-switching boost converter using a coupled inductor,” Journal of Power Electronics, vol. 11, no. 1, pp. 507- 511, Jan.2011.
http://dx.doi.org/10.6113/jpe.2011.11.1.016

Do, H.-L., Analysis and implementation of a zero-voltage-switching synchronous buck converter with a coupled inductor, (2011) International Review of Electrical Engineering (IREE), 6 (4), pp. 1556-1563.

H. L. Do, “Analysis and implementation of a zero-voltage- switching synchronous buck converter with a coupled inductor,” International Conference on Power Energy (ICPS), 2011, pp. 1– 6.
http://dx.doi.org/10.1109/tie.2010.2084973

J. W. Yang, and H.L. Do, “Bridgeless sepic converter with a ripple-free input current,” IEEE Trans. Power Electron., vol. 28, no.7, pp. 3388-3394, Jul. 2013.
http://dx.doi.org/10.1109/tpel.2012.2226607


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