Analysis of a High-Power-Factor Electronic Ballast for High Brightness Light Emitting Diodes

Author

Spiazzi, Giorgio ; Buso, Simone ; Meneghesso, Gaudenzio

Author_Institution

Dept. of Inf. Eng., Padova Univ.

fYear

2005

fDate

16-16 June 2005

Firstpage

1494

Lastpage

1499

Abstract

This paper analyzes the performance of a high-power-factor AC-DC converter for the supply of high-brightness light emitting diodes (HBLEDs). The considered topology is a D² one (i.e. a topology that, working in continuous conduction mode, has a voltage conversion ratio that is a function of the duty-cycle squared), working in one of its possible discontinuous modes. No line-frequency energy storage element is used so that the LED current is pulsating at twice the line frequency, with a small high-frequency ripple on top. The impact of such pulsating current supply on LED optical performance and reliability is also evaluated by comparison with standard DC current supply

Keywords

AC-DC power convertors; brightness; energy storage; lamp accessories; light emitting diodes; power factor; LED optical performance; continuous conduction mode; energy storage element; high-brightness light emitting diodes; high-frequency ripple; high-power-factor AC-DC converter; high-power-factor electronic ballast; voltage conversion ratio; AC-DC power converters; Brightness; Circuit topology; Current supplies; Electronic ballasts; Energy storage; Frequency; Light emitting diodes; Performance analysis; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th

Conference_Location

Recife

Print_ISBN

0-7803-9033-4

Type

conf

DOI

10.1109/PESC.2005.1581828

Filename

1581828