Single-stage driver for supplying high-power light-emitting-diodes with universal utility-line input voltages
作者： C.-A. Cheng , H.-L. Cheng , C.-W. Ku , F.-L. Yang
DOI: 10.1049/IET-PEL.2011.0478
关键词:
摘要: The conventional two-stage non-isolated driver for high-power light-emitting diodes (LEDs) is composed of a power-factor-correction (PFC) converter with flyback regulating the output voltage/current supplying LEDs. However, large numbers circuit components are required and total efficiency limited because power conversion. This study proposes LEDs based on single-stage topology. presented combines buck-boost PFC two windings connected in series into power-conversion circuit. proposed offers high factor, efficiency, low total-harmonics-distortion (THD) input utility-line current, cost-effectiveness constant-output voltage along limited-output-current control scheme. Finally, prototype developed tested order to supply 100 W LED light bar module universal voltages indoor or outdoor general lighting applications. Operational analysis, design equations, example experimental results provided by examining three modules demonstrate feasibility
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