DocumentCode :
3508517
Title :
Electronic driver without electrolytic capacitor for dimming High Brightness LEDs
Author :
Garcia, J. ; Calleja, A.J. ; Corominas, E.L. ; Gacio, D. ; Ribas, J.
Author_Institution :
Dept. of Electr. Eng., Univ. of Oviedo, Oviedo, Spain
fYear :
2009
fDate :
3-5 Nov. 2009
Firstpage :
3518
Lastpage :
3523
Abstract :
This paper presents a full ballast for driving an assembly of high brightness LEDs, based on a new dc to dc converter. The converter provides a constant current waveform to the load parting from a DC bus voltage. The converter, operating with a peak current control, keeps the current through the LEDs constant independently of the bus voltage. This is carried out internally by self-adjusting the switching frequency of the converter. Thus, the requirements of the capacitance of the bus capacitor are greatly diminished, allowing the avoidance of electrolytic technology. Also, low frequency PWM dimming can be carried out easily. The present work shows the design procedure and the experimental results obtained after building a prototype of a full ballast for HB LEDs.
Keywords :
DC-DC power convertors; LED lamps; electric current control; DC bus voltage; bus capacitor; dc to dc converter; electronic driver; high brightness LED; low frequency PWM dimming; peak current control; Assembly; Brightness; Capacitors; Current control; DC-DC power converters; Driver circuits; Electronic ballasts; Light emitting diodes; Pulse width modulation; Voltage; Electrolytic Capacitor Avoidance; Electronic Light Dimming; High Brightness LEDs; System modeling and control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Electronics, 2009. IECON '09. 35th Annual Conference of IEEE
Conference_Location :
Porto
ISSN :
1553-572X
Print_ISBN :
978-1-4244-4648-3
Electronic_ISBN :
1553-572X
Type :
conf
DOI :
10.1109/IECON.2009.5415167
Filename :
5415167
Link To Document :
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