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Single-Stage Coupled-Inductor Sepic-Type HB-LED Driver with Soft Switching for Universal Line Input

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  • Chih-Lung Shen
  • Kuo-Kuang Chen

Abstract

This paper proposes a single-stage Sepic-type high brightness LED driver for universal line input to perform power factor correcting and LED dimming. In the driver, a coupled inductor is introduced to replace with two separate inductors to lower volume and cost. A soft-switching cell is embedded into the driver to obtain zero-voltage switching (ZVS) feature so as to furthermore improve driver efficiency. Mathematical derivation and detailed discussion is presented. A prototype is designed, analyzed and implemented, which demonstrates the feasibility of the driver and verifies the theoretical analysis.

Suggested Citation

  • Chih-Lung Shen & Kuo-Kuang Chen, 2012. "Single-Stage Coupled-Inductor Sepic-Type HB-LED Driver with Soft Switching for Universal Line Input," Mathematical Problems in Engineering, Hindawi, vol. 2012, pages 1-17, July.
    • Handle: RePEc:hin:jnlmpe:593568
    DOI: 10.1155/2012/593568
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