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Related Experiment Video

Updated: Jun 10, 2025

In Depth Analyses of LEDs by a Combination of X-ray Computed Tomography CT and Light Microscopy LM Correlated with Scanning Electron Microscopy SEM

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Published on: June 16, 2016

Performance Evaluation of the Two-Input Buck Converter as a Visible Light Communication High-Brightness LED Driver

Daniel G Aller¹, Diego G Lamar², Juan R García-Mere²

¹Airbus Crisa (an Airbus Defense and Space Company), 28760 Madrid, Spain.

Sensors (Basel, Switzerland)

|October 16, 2024

Summary

This study introduces a novel driver for high-brightness Light-Emitting Diodes (HB-LEDs) in Visible Light Communication (VLC) using a Two-Input Buck (TIBuck) converter. This efficient design simplifies power splitting for HB-LEDs and communication tasks, achieving high data rates.

Keywords:

high-brightness LED split power two-input buck (TIBuck) DC/DC converter visible light communication (VLC)

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Area of Science:

Electrical Engineering
Optical Communications
Power Electronics

Background:

Visible Light Communication (VLC) systems require efficient drivers for High-Brightness Light-Emitting Diodes (HB-LEDs).
Existing VLC drivers often use complex power splitting techniques with multiple DC/DC converters, sometimes requiring galvanic isolation.
These methods can lead to lower efficiency and increased complexity in HB-LED driver design.

Purpose of the Study:

To propose a high-efficiency HB-LED driver for VLC applications.
To simplify the power splitting architecture for VLC systems.
To improve communication capability and efficiency compared to existing Buck converter-based solutions.

Main Methods:

A Two-Input Buck (TIBuck) DC/DC converter topology was employed for HB-LED driver design.
The proposed method avoids galvanic isolation requirements by utilizing the TIBuck converter for natural power splitting.
An auxiliary Buck DC/DC converter operating at low frequency generates the necessary secondary voltage source.

Main Results:

The experimental prototype achieved a high efficiency of 94%.
The driver successfully reproduced a 64-QAM digital modulation scheme.
A bit rate of 1.5 Mbps was achieved with a communication error rate of 12%.

Conclusions:

The TIBuck DC/DC converter offers a simplified and efficient solution for HB-LED drivers in VLC systems.
The proposed driver overcomes the isolation drawback of previous split-power techniques.
The design enables high-frequency operation for enhanced communication performance and reduced filtering needs.