Pulsed current source to drive high-brightness LED lamps

Author

Brañas, C. ; Azcondo, F.J. ; Casanueva, R. ; Díaz, F.J. ; López, V.M. ; Navarro, A.

Author_Institution

Syst. & Autom. Eng. Dept., Univ. of Cantabria, Santander, Spain

fYear

2012

fDate

25-28 Oct. 2012

Firstpage

4591

Lastpage

4596

Abstract

This paper presents a resonant converter to drive high-brightness light emitting diode (LED) lamps. The resonant converter operates at constant switching frequency, where the control parameter is the phase displacement ψ between the drive signals of each inverter leg. The proposed driver is able to set different patterns of amplitude and pulsewidth modulation (AM and PWM) of the output current to implement the dimming control of the lamp. This control flexibility arises from the wide bandwidth of the resonant converter ensuring an operation free of instabilities and flicker effects. A 120W prototype intended for street lighting applications has been built to validate the design proposal.

Keywords

LED lamps; PWM invertors; lighting control; resonant invertors; AM; PWM; amplitude modulation; constant switching frequency; control parameter; flicker effects; high-brightness LED lamps; high-brightness light emitting diode lamps; inverter leg; lamp dimming control; phase displacement; power 120 W; pulse width modulation; pulsed current source; resonant converter; street lighting applications; Frequency modulation; Inverters; Pulse width modulation; Resonant frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society

Conference_Location

Montreal, QC

ISSN

1553-572X

Print_ISBN

978-1-4673-2419-9

Electronic_ISBN

1553-572X

Type

conf

DOI

10.1109/IECON.2012.6389475

Filename

6389475