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Circuit Topology Analysis for LED Lighting and its Formulation Development

Author

Listed:
  • William Chen

    (Power Electronics Research Centre, Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, China)

  • Ka Wai Eric Cheng

    (Power Electronics Research Centre, Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, China)

  • Jianwei Shao

    (Power Electronics Research Centre, Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, China)

Abstract

Light emitted diode (LED) is becoming more popular in the illumination field, and the design of LED lighting is generally made to provide illumination at lower power usage, helping save energy. A power electronic converter is needed to provide the power conversion for these LEDs to meet high efficiency, reduce components, and have low voltage ripple magnitude. The power supply for LED is revisited in this paper. The LEDs connected in series with diode, transistor, or inductor paths are examined. The formulation for each of the cases is described, including the classical converters of buck, boost, buck–boost, and Ćuk. The circuit reductions of the classic circuit, circuit without the capacitor, and without a freewheeling diode are studied. Using LED to replace freewheeling diodes is proposed for circuit component reduction. General equations for different connection paths have been developed. The efficiency and output ripple amplitude of the proposed power converters are investigated. Analytical study shows that the efficiency of proposed circuits can be high and voltage ripple magnitude of proposed circuits can be low. The results show that the proposed circuit topologies can be easily adapted to design LED lighting, which can meet the criteria of high efficiency, minimum components, and low-voltage ripple magnitude at the same time.

Suggested Citation

  • William Chen & Ka Wai Eric Cheng & Jianwei Shao, 2019. "Circuit Topology Analysis for LED Lighting and its Formulation Development," Energies, MDPI, vol. 12(21), pages 1-27, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:21:p:4203-:d:283354
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    References listed on IDEAS

    as
    1. Yu-Chen Liu & Chen Chen & Kai-De Chen & Yong-Long Syu & Meng-Chi Tsai, 2019. "High-Frequency LLC Resonant Converter with GaN Devices and Integrated Magnetics," Energies, MDPI, vol. 12(9), pages 1-19, May.
    2. Huipin Lin & Jin Hu & Xiao Zhou & Zhengyu Lu & Lujun Wang, 2018. "New DC Grid Power Line Communication Technology Used in Networked LED Driver," Energies, MDPI, vol. 11(12), pages 1-16, December.
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    Citations

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    Cited by:

    1. Salvatore Musumeci & Radu Bojoi & Eric Armando & Stefano Borlo & Fabio Mandrile, 2020. "Three-Legs Interleaved Boost Power Factor Corrector for High-Power LED Lighting Application," Energies, MDPI, vol. 13(7), pages 1-16, April.

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