Efficient Hybrid Buck Converter for Visible Light Communication in LED Drivers | IEEE Journals & Magazine | IEEE Xplore

Efficient Hybrid Buck Converter for Visible Light Communication in LED Drivers


Abstract:

This article presents an LED driver for lighting and visible light communication (VLC), which utilizes the light of the LEDs to wirelessly transmit data by modulating the...Show More

Abstract:

This article presents an LED driver for lighting and visible light communication (VLC), which utilizes the light of the LEDs to wirelessly transmit data by modulating their instantaneous current. The solution proposed in this article seeks to unite the high efficiency of switched-mode power supplies with the wide bandwidth of linear power amplifiers (LPAs) to achieve high-speed communications. The hybrid converter processes the energy from a 48-V dc bus with an efficiency of 94% while supplying a 20-W LED load, and providing 3.68 MHz of bandwidth for VLC. Details regarding frequency limitations are provided in terms of a Laplace model. The impact of the LPA on the overall efficiency is mitigated by adopting specific design constraints. Finally, experimental results are shown from a prototype working with signals aimed at multicarrier multilevel modulations based on orthogonal frequency division multiplexing.
Published in: IEEE Transactions on Industrial Electronics ( Volume: 69, Issue: 2, February 2022)
Page(s): 1877 - 1887
Date of Publication: 25 February 2021

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