Pulsed current source with active control of the on-time current for LED lamp driver applications

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Identificadores
URI: http://hdl.handle.net/10902/9454
ISBN: 978-1-4799-4032-5
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Autoría
Brañas Reyes, ChristianAutoridad Unican; Azcondo Sánchez, Francisco JavierAutoridad Unican; Casanueva Arpide, RosarioAutoridad Unican; Díaz Rodríguez, Francisco JavierAutoridad Unican
Fecha
2014
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© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Publicado en
40th Annual Conference of the IEEE Industrial Electronics Society (IECON 2014), Dallas, 2014, 1727-1732
Editorial
IEEE
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Palabras clave
Light sources
LED lamps
Lighting control
Feedback circuits
Negative feedback
Close loop systems
Phase shifters
Resumen/Abstract
This paper presents a simplified envelope model to study the dynamics of a phase-controlled resonant converter suitable to drive light emitting diode (LED) lamps. The approximate closed form of the transfer function is obtained from the proposed reduced-order model. The fast dynamics of the resonant converter allows us implementing a pulsed current source with active control of the on-time-current free of instabilities and flicker effect with a type II or integral-single-lead controller. A 120W prototype intended for street lighting applications has been built to validate the study.
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