An electronic AC power system with buck PFC and linear regulator to drive and control the current of power LEDs

Author

Fonseca, Zito P da ; Font, Carlos I. ; Kaster, Mauricio S. ; Perin, Arnado J. ; Nascimento, Claudinor B.

Author_Institution

Univ. Tecnol. Fed. do Parana - Ponta Grossa, Ponta Grossa, Brazil

fYear

2011

fDate

11-15 Sept. 2011

Firstpage

864

Lastpage

870

Abstract

This paper presents an electronic AC power system, with power factor correction, to drive and control the current of LEDs (Light Emitting Diodes). The power factor correction and the controlled DC bus voltage are performed by a Buck stage. A transistorized linear regulator coupled to the Buck will drive and control the LEDs. A study is presented considering the variation of the current ripple of LEDs as a function of the DC bus voltage ripple. A design methodology is presented for reducing losses in the linear regulator. Experimental results are presented to demonstrate the proposed design methodology.

Keywords

electric current control; light emitting diodes; light sources; lighting control; power factor correction; LED current ripple; buck PFC; controlled DC bus voltage ripple; current control; electronic AC power system; light emitting diodes; power LED; power factor correction; transistorized linear regulator; Capacitors; Light emitting diodes; Lighting; Power factor correction; Power supplies; Regulators; Voltage control; LEDs; buck PFC; lighting; linear regulator;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Conference (COBEP), 2011 Brazilian

Conference_Location

Praiamar

ISSN

2175-8603

Print_ISBN

978-1-4577-1644-7

Electronic_ISBN

2175-8603

Type

conf

DOI

10.1109/COBEP.2011.6085189

Filename

6085189