High-power-factor light-emitting diode lamp power supply without electrolytic capacitors for high-pressure-sodium lamp retrofit applications

A long-life high-power-factor integrated converter able to supply light-emitting diode (LED) lamps in high-pressure-sodium lamp retrofitting applications is presented. The proposed converter is the integration of a buck-boost converter with a buck converter, thus providing the necessary high input p...

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Veröffentlicht in:IET power electronics 2013-09, Vol.6 (8), p.1502-1515
Hauptverfasser: Alonso, J. Marcos, Calleja, Antonio J, Gacio, David, Cardesín, Jesus, Lopez, Emilio, Dalla Costa, Marco Antonio, da Silva, Marcelo Freitas, do Prado, Ricardo Nederson
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Sprache:eng
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Zusammenfassung:A long-life high-power-factor integrated converter able to supply light-emitting diode (LED) lamps in high-pressure-sodium lamp retrofitting applications is presented. The proposed converter is the integration of a buck-boost converter with a buck converter, thus providing the necessary high input power factor and voltage transformation ratio to supply the low-voltage LED array from the mains. The analysis of the converter is carried out, and a design procedure is proposed. The design is also performed so that low capacitances are needed at the output of each semi-stage. This allows for the use of long-life film capacitors, thus matching the converter lifetime to that of the LED lamp. A laboratory prototype supplied from 230 Vrms/50 Hz mains used to drive two LED arrays in series with a total output power of 100 W is presented.
ISSN:1755-4535
1755-4543
1755-4543
DOI:10.1049/iet-pel.2012.0142