Open AccessHigh‐power‐factor light‐emitting diode lamp power supply without electrolytic capacitors for high‐pressure‐sodium lamp retrofit applications
Author(s) -
Alonso J. Marcos,
Calleja Antonio J.,
Gacio David,
Cardesín Jesus,
Lopez Emilio,
Dalla Costa Marco Antonio,
Silva Marcelo Freitas,
Prado Ricardo Nederson
Publication year - 2013
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2012.0142
Subject(s) - sodium vapor lamp , materials science , diode , electrolytic capacitor , power factor , capacitor , power (physics) , electrical engineering , optoelectronics , led lamp , light emitting diode , voltage , engineering , optics , physics , quantum mechanics
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 V rms /50 Hz mains used to drive two LED arrays in series with a total output power of 100 W is presented.