Applying One-Comparator Counter-Based Sampling to Current Sharing Control of Multichannel LED Strings

Author

Hwu, K.I. ; Yau, Y.T.

Author_Institution

Dept. of Electr. Eng., Nat. Taipei Univ. of Technol., Taipei, Taiwan

Volume

47

Issue

6

fYear

2011

Firstpage

2413

Lastpage

2421

Abstract

In this paper, a fully digitalized current sharing strategy without any analog-to-digital converter (ADC) is presented and applied to light-emitting diode (LED) lighting. By doing so, the cost for digital control is reduced significantly due to no ADC used. Aside from this, LED dimming is easy to realize. Above all, the proposed current sharing method has the capability of resisting variations in input voltage and component parameter. Such a control topology is demonstrated by some experiments and hence is very suitable for LED street lighting.

Keywords

comparators (circuits); digital control; electric current control; light emitting diodes; LED dimming; LED street lighting; comparator counter; current sharing control; digital control; fully digitalized current sharing; light emitting diode; multichannel LED strings; Current limiters; Digital control; Inductance; Inductors; Light emitting diodes; Pulse width modulation; Sampling methods; Voltage control; Current sharing control; light-emitting diode (LED) string; multichannel; one-comparator counter-based sampling;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2011.2168596

Filename

6022773