Integrated SEPIC buck-boost converter as an off-line LED driver without electrolytic capacitors

@article{Almeida2012IntegratedSB,
  title={Integrated SEPIC buck-boost converter as an off-line LED driver without electrolytic capacitors},
  author={Pedro S. Almeida and Guilherme M{\'a}rcio Soares and Darque Pinto and Henrique Ant{\^o}nio Carvalho Braga},
  journal={IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society},
  year={2012},
  pages={4551-4556}
}
In this work, a new topology of integrated converter is proposed to be used as an off-line LED driver. The two stages of the converter are made up by a front-end SEPIC power factor corrector and a buck-boost converter for current regulation, both stages sharing the same power switch. It is demonstrated that when both stages work in DCM, less low-frequency ripple is transmitted from the bus capacitor to the output, allowing decreasing the amount of filtering needed and eliminating electrolytic… CONTINUE READING

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Means of Eliminating Electrolytic Capacitor in ACmC Power Supp , lies for LED Lightings

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