Resonance-Assisted Buck Converter for Offline Driving of Power LED Replacement Lamps

  title={Resonance-Assisted Buck Converter for Offline Driving of Power LED Replacement Lamps},
  author={Xiaohui Qu and Siu-Chung Wong and C. K. Tse},
  journal={IEEE Transactions on Power Electronics},
LEDs are potential successors of incandescent lamps with high luminous efficacy and long lifetime. To improve the overall luminair efficacy and lifetime, the power efficiency and lifetime of LED ballasts become important factors. Efficiency gain in transformerless power converters appears attractive for applications without isolation. Driving solid-state LED bulbs in an existing lighting fixture such as PAR30 style housing from universal mains necessitates a high-voltage step-down ratio in… CONTINUE READING
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