Performance Analysis of LED Driver for Transmitter of Visible Light Communication Using Pulse Width Modulation

Visible Light Communication (VLC) enables high speed internet access especially in indoor environments and works on the principle of modulation of the intensity of existing solid state lighting infrastructure that is often provided by Light-Emitting Diodes (LEDs). In order to analyze the performance, this study examined the effect of using the LT8391 LED driver as a VLC transmitter. By modifying the circuit of the LT8391 LED driver, Vin can be pressed to 5.5 V, while Vout can be enlarged to reach 32.8 V. In addition, the modulation method used is Pulse Width Modulation (PWM). Blinking effect can be minimized by adjusting the duty cycle of the PWM. Finally, data transmission is realized with no blinking effect, so it will not disturb the room's lighting system.