An Equivalent Circuit Model of a Commercial LED With an ESD Protection Component for VLC

Xicong Li (1) , Zabih Ghassemlooy (1) , Stanislav Zvanovec (2) , Luis Nero Alves (3)

1 University of Northumbria at Newcastle [United Kingdom]
2 CTU - Czech Technical University in Prague
3 DETI - Department of Electronics, Telecommunications and Informatics [Aveiro]

An equivalent circuit model for a typical commercial light-emitting diode (LED) used in visible light communication (VLC) applications is proposed. The parameters of the elements in the model are extracted from the measured impedance using a vector network analyser. The model shows high accuracy in fitting the measured results and shows the effect of bonding/packaging parasitics and the electrostatic discharge (ESD) component on the LED's impedance and bandwidth. This study aims to raise the designer's awareness when designing and fabricating high-speed LED/µLED devices to achieve the optimal modulation bandwidth in the emerging VLC applications.

Keywords: VLC; LiFi; LED; impedance; equivalent circuit model; ESD; parasitics

Domains: Engineering Sciences [physics]; Optics / Photonic

Xicong Li, Zabih Ghassemlooy, Stanislav Zvanovec, Luis Nero Alves. An Equivalent Circuit Model of a Commercial LED With an ESD Protection Component for VLC. IEEE Photonics Technology Letters, 2021, 33 (15), pp.777-779. ⟨10.1109/LPT.2021.3095557⟩. ⟨hal-03341366⟩