Fading circuit for linear/exponential current variations in boost coverters for LED driving

Author

Vasilica, Anca ; Pristavu, Gheorghe ; Anghel, Vlad ; Brezeanu, Gheorghe

Author_Institution

ON Semicond. Romania, Romania

fYear

2015

Firstpage

1

Lastpage

4

Abstract

This paper proposes a fading circuit for LED driving applications, designed to obtain both linear and exponential LED current variation. It consists of reference register, counter, decoder, output register and a multiple-cell digitally controlled current source (DCCS). An analytical study of the decoder translation functions and DCCS architecture is performed. The circuit is included into a boost converter IC Controller manufactured in a 50V, 0.5μm CMOS technology and experimentally validated. Results show good theoretical and measured data.

Keywords

driver circuits; light emitting diodes; power convertors; CMOS technology; DCCS architecture; LED driving; boost converter IC controller; decoder translation functions; exponential LED current variation; fading circuit; linear LED current variation; multiple-cell digitally controlled current source; output register; reference register; Current measurement; Decoding; Fading; Light emitting diodes; Radiation detectors; Registers; Transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Circuits and Systems (ISSCS), 2015 International Symposium on

Conference_Location

Iasi

Print_ISBN

978-1-4673-7487-3

Type

conf

DOI

10.1109/ISSCS.2015.7204022

Filename

7204022