title: The High-efficiency LED Driver for Visible Light Communication Applications.
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.
authors: Department of Electrical Engineering, College of Engineering, Chang Gung University, Taoyuan 33302, Taiwan.|Portable Energy System Group, Green Technology Research Center, College of Engineering, Chang Gung University, Taoyuan County 33302, Taiwan.|Chang Gung Memorial Hospital at Linkou, Taoyuan 33304, Taiwan.
authors: Cihun-Siyong Alex
authors: CS
authors: Gong
authors: Department of Green Electronics Design and Application, Industrial Technology Research Institute, Hsinchu 31040, Taiwan.
authors: Yu-Chen
authors: YC
authors: Lee
authors: Department of Green Electronics Design and Application, Industrial Technology Research Institute, Hsinchu 31040, Taiwan.
authors: Jyun-Liang
authors: JL
authors: Lai
authors: Department of Green Electronics Design and Application, Industrial Technology Research Institute, Hsinchu 31040, Taiwan.
authors: Chueh-Hao
authors: CH
authors: Yu
authors: Department of Green Electronics Design and Application, Industrial Technology Research Institute, Hsinchu 31040, Taiwan.
authors: Li Ren
authors: LR
authors: Huang
authors: Department of Biomedical Engineering, Ming-Chuan University, 5 De Ming Rd., Guishan Township, Taoyuan County 33348, Taiwan.
authors: Chia-Yen
authors: CY
authors: Yang