Improved state-space averaged representation of LED drivers considering the dynamic model of the load

Author

Almeida, Pedro S. ; Mello, A.L.C. ; Albuquerque, V.M. ; Soares, G.M. ; Pinto, D.P. ; Braga, Henrique A. C.

Author_Institution

Modern Lighting Res. Group (NIMO), Fed. Univ. of Juiz de Fora (UFJF), Juiz de Fora, Brazil

fYear

2013

fDate

27-31 Oct. 2013

Firstpage

434

Lastpage

439

Abstract

This paper introduces an improved stat-space averaged representation of switching power converters for LED driving taking into consideration the equivalent electrical model of the LED array being driven. This allows for exact prediction of the large-signal behavior of the converter when presented with duty-cycle, load and input voltage disturbances, as well as obtaining the accurate small-signal transfer functions for proper control loop design. Simulation and experimental results are given to validate the state-space model presented, which are then compared to the classical approach to modeling such LED drivers.

Keywords

driver circuits; light emitting diodes; lighting; switching convertors; LED driver array; control loop design; equivalent electrical model; improved state-space averaged representation; input voltage disturbance; lighting; load disturbance; small-signal transfer function; switching power converter; Arrays; Light emitting diodes; Load modeling; Mathematical model; Numerical models; Predictive models; Transfer functions; Averaged Modeling; Converter Modeling; Converter Simulation; LED Drivers; Light-Emitting Diodes; State-Space Averaged Modeling;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Conference (COBEP), 2013 Brazilian

Conference_Location

Gramado

ISSN

2175-8603

Type

conf

DOI

10.1109/COBEP.2013.6785152

Filename

6785152