Title :
Evaluation on the Efficiency of Power LEDs Driven with Currents Typical to Switch Mode Power Supplies
Author :
Schmid, M. ; Kuebrich, D. ; Weiland, M. ; Duerbaum, T.
Author_Institution :
Friedrich-Alexander -Univ. Erlangen-Nuremberg, Erlangen
Abstract :
Electronic ballasts are necessary to use light emitting diodes (LEDs) for illuminating purposes powered from the mains. As a consequence this paper shows an examination of two white LEDs considering the resulting losses in luminous efficiency if the LEDs will be driven with different current waveforms as they typically occur in switch-mode power supplies. Therefore it is possible to estimate to which extend more circuitry effort is advisable.
Keywords :
lamp accessories; light emitting diodes; switched mode power supplies; electronic ballasts; light emitting diodes; luminous efficiency; power LED; switch mode power supplies; Circuits; Current measurement; Electronic ballasts; Fluorescent lamps; Light emitting diodes; Lighting; Power supplies; Switches; Temperature dependence; Voltage;
Conference_Titel :
Industry Applications Conference, 2007. 42nd IAS Annual Meeting. Conference Record of the 2007 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
978-1-4244-1259-4
Electronic_ISBN :
0197-2618
DOI :
10.1109/07IAS.2007.178
