IMPLEMENTATION OF LINEAR CURRENT MODULATION FOR LED DRIVER IC

Abstract

The Light-Emitting Diode (LED) driver is an important part of Visible Light Communication (VLC) systems. The main challenge of the VLC LED driver is to offer a high data transmission rate with high power efficiency. This paper presents the design, analysis and layout of a white light LED driver that combines the LED lighting with VLC technology and their different level of signal analysis. This paper presents three approaches that is device modeling, reduction of leakage current and design of Silicon on insulator (SOI).The proposed LED driver uses linear current regulation and controls the AC current signal and the DC current through a single power device for the purposes of high speed, high efficiency and high integration. In addition, this work presents an impedance reduction technique to enhance the bandwidth of the LED driver. And a first-order pre-equalizer is utilized to enhance the electron-optical electron (E/O/E) bandwidth in the VLC system due to the bandwidth limitation of the phosphor converted LED. So, LED driver adds the VLC technology into solid-state lighting successfully.