Bridgeless SEPIC PFC Converter for Multistring LED Driver

  • Aman JhaEmail author
  • Bhim Singh
Original Contribution


This paper deals with Power Factor Correction (PFC) in Low Voltage High Current (LVHC) multi-string light emitting diode (LED) using a bridgeless (BL) single ended primary inductance converter (SEPIC). This application is designed for large area LED lighting with illumination control. A multi-mode LED dimming technique is used for the lighting control. The BL-SEPIC PFC converter is used as a load emulator for high power factor. The regulated low voltage from flyback converter is a source power to the synchronous buck converters for multi-string LED driver and forced cooling system for LED junction. The BL-SEPIC PFC converter inductor design is based on Discontinuous Inductor Current Modes (DICM) which provides good PFC at low cost. Test results are found quite satisfactory for universal input AC (90–265 V). There is significant improvement in the power factor and input current Total Harmonic Distortion (THD) with good margin of harmonic limits for lighting IEC 61000-3-2 Class C.


BL-SEPIC converter DC–DC converter Flyback converter LED control Power factor correction Total harmonic distortion Power quality 


  1. 1.
    A. Bergh, G. Craford, A. Duggal, R. Haitz, The promise and challenge of solid-state lighting. Phys. Today 54, 42–47 (2001)CrossRefGoogle Scholar
  2. 2.
    A. Jha, B. Singh, High power factor and low total harmonics distortion using critical conduction mode boost converter–fed light-emitting diode driver. Int. Trans. Elect. Energy Syst. 10, 1–11 (2016)Google Scholar
  3. 3.
    C.W. Tang, B.J. Huang, S.P. Ying, Illumination and color control in red–green–blue light-emitting diode. IEEE Trans. Power Electron. 29(9), 4921–4937 (2014)CrossRefGoogle Scholar
  4. 4.
    V. Bist, B. Singh, Reduced sensor configuration of a power factor correction based single-ended primary inductance converter fed brushless DC motor drive. IET Power Electron. 8(9), 1606–1615 (2015)CrossRefGoogle Scholar
  5. 5.
    A. Jha, B. Singh, Bridgeless canonical switching cell based PFC converter for high power LED driver. EPE J. 27(1), 24–34 (2017)CrossRefGoogle Scholar
  6. 6.
    M. Hernandez, C. Aguilar, J. Arau, J. Sebastian, J. Uceda, Comparative analysis of boost and buck-boost derived topologies used as power factor correctors, in Proc. of 21st IEEE Int. Conf. Indus. Electron., Control, and Instru. (IECON), vol. 1, pp. 335–340 vol. 1, pp. 6–10, 1995Google Scholar
  7. 7.
    K. Matsui, L. Yamamoto, T. Kishi, M. Hasegawa, H. Mori, F. Ueda, A comparison of various buck-boost converters and their application to PFC, in Proc. of 28th IEEE Annual Conf. of IECON (Ind. Electron. Society), vol. 1, pp. 30–36 vol. 1, pp. 5–8, 2002Google Scholar
  8. 8.
    J.X. Long, R. Liao, J. Zhou, Development of street lighting system-based novel high-brightness LED modules. IET Optoelectron. 3(1), 40–46 (2009)CrossRefGoogle Scholar
  9. 9.
    A.K. Jha, B. Singh, A PFC modified landsman converter-based PWM-dimmable RGB HB-LED driver for large area projection applications. IEEE Trans. Ind. Appl. 53(2), 1552–1561 (2017)CrossRefGoogle Scholar
  10. 10.
    S.K. Maddula, J.C. Balda, Lifetime of electrolytic capacitors in regenerative induction motor drives, in IEEE 36th Power Electronics Specialists Conference, (PESC), vol. 16, pp. 153–159, 16, 2005Google Scholar
  11. 11.
    A. Jha, B. Singh, Power quality improvement using CSC converter for high power LED driver, in IEEE 6th International Conference on Power Systems (ICPS), New Delhi, pp. 1–6, 2016Google Scholar
  12. 12.
    A. Jha, B. Singh, Zeta converter for power quality improvement for multi-string LED driver, in IEEE Indus. App Soc. Ann. Meet., Portland, OR, USA, pp. 1–8, 2016Google Scholar
  13. 13.
    A. Jha, B. Singh, PFC based SEPIC converter for PWM-dimmable high brightness LED driver, in IEEE ICPEICES, New Delhi, pp. 1–6, 4–6, 2016Google Scholar
  14. 14.

Copyright information

© The Institution of Engineers (India) 2018

Authors and Affiliations

  1. 1.ST Microelectronics Pvt. Ltd.Greater NoidaIndia
  2. 2.Indian Institute of Technology DelhiNew DelhiIndia

Personalised recommendations