Improvement in efficiency of LED lighting system

Author

Hwu, K.I. ; Jiang, W.Z. ; Jenn-Jong Shieh

Author_Institution

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

fYear

2014

fDate

18-21 May 2014

Firstpage

3190

Lastpage

3193

Abstract

In this paper, a LED dimming circuit, together with the KY converter, is presented, which is controlled based on the field-programmable gate array (FPGA). By a given dimming command and the proposed maximum gate voltage detector, the voltage across the MOSFET in the linear current regulator can be reduced so as to upgrade the efficiency of the overall system. Aside from this, each LED string takes level dimming, and is powered by the KY converter, which has an output inductor and hence upgrades the life of the output capacitor. Furthermore, via some experimental results, the efficiency based on the proposed control method is higher than that based on the traditional control one.

Keywords

MOSFET; capacitors; electric current control; field programmable gate arrays; inductors; light emitting diodes; lighting; power convertors; FPGA; KY converter; LED dimming circuit; LED lighting system; MOSFET; dimming command; field-programmable gate array; inductor; linear current regulator; maximum gate voltage detector; Radio access networks; Efficiency; LED lighting; triode region;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE-ASIA), 2014 International

Conference_Location

Hiroshima

Type

conf

DOI

10.1109/IPEC.2014.6870143

Filename

6870143