The High-efficiency LED Driver for Visible Light Communication Applications

Cihun Siyong Alex Gong*, Yu Chen Lee, Jyun Liang Lai, Chueh Hao Yu, Li Ren Huang, Chia Yen Yang

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

35 Scopus citations

Abstract

This paper presents a LED driver for VLC. The main purpose is to solve the low data rate problem used to be in switching type LED driver. The GaN power device is proposed to replace the traditional silicon power device of switching LED driver for the purpose of increasing switching frequency of converter, thereby increasing the bandwidth of data transmission. To achieve high efficiency, the diode-connected GaN power transistor is utilized to replace the traditional ultrafast recovery diode used to be in switching type LED driver. This work has been experimentally evaluated on 350-mA output current. The results demonstrate that it supports the data of PWM dimming level encoded in the PPM scheme for VLC application. The experimental results also show that system's efficiency of 80.8% can be achieved at 1-Mb/s data rate.

Original languageEnglish
Article number30991
JournalScientific Reports
Volume6
DOIs
StatePublished - 08 08 2016

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