Modeling of Inrush Current Surges—LED Strip Drivers Case Study

Abstract

This paper is an investigation into the high inrush current effect that emerges during the energizing of drivers of different circuit types loaded by light-emitting-diode (LED) strips. Two different driver circuit types were analyzed—a voltage stabilization (VS) circuit utilizing a Zener diode, and a current stabilization (CS) circuit type in the form of an integrated circuit (IC). Inrush current waveforms were calculated for drivers loaded by various numbers of LEDs. In the frame of the study, analysis executed for drivers energized by diverse input voltage RMS values at different switching-on phases was performed. The analysis is comprised of experimental verification of LT SPICE simulation results of current waveforms and calculations of current peak values appearing while switching on the supply voltage. The developed models for simulation needs were elaborated concerning precise reflection of the real current and voltage waveforms obtained during oscilloscopic registration of the switching-on process. The assumed simulation model parameters were mainly attuned in view of steady-state current simulations, and the implemented method of high-frequency (HF) transient modeling allowed for precise current waveform reflection. Finally, the utilization effectiveness of the proposed simple inrush current limiting circuit was estimated.

Investigation of an LED Strip Controller Based on a PWM Driver and a PIC Series Microcontroller

“…If new data are entered into the application, the entire cycle is repeated, and the data entered into the application are saved. The control of the LED controller takes place using an application on a smartphone [1][2][3][4][5]. This application is designed for smart devices with the Android operating system.…”

“…It is worth noting that such control panels are quite compact and can be installed in residential or industrial premises, shopping centers, etc. When designing control panels, it is necessary to take into account the general concept of the premises and the principles of ergonomics of the arrangement of devices, as well as the general design [2][3][4][5].…”

“…As can be seen from the measurement results, the power of one channel changed from 1 to 12 W when the PWM signal was changed from 10 to 100%. It is worth noting that, in each specific case, the power of the power supply channel may vary depending on the characteristics of the power source used [2][3][4][5]. generate such power directly; therefore, the power supply from the power source to the individual channels of the LED controller is modulated by the same law as the PWM signal change using MOSFET-type transistors.…”

“…As can be seen from the measurement results, the power of one channel changed from 1 to 12 W when the PWM signal was changed from 10 to 100%. It is worth noting that, in each specific case, the power of the power supply channel may vary depending on the characteristics of the power source used [2][3][4][5]. During this research, how the light flux changed when the power of one power channel changed was studied.…”

“…This is especially relevant in various industrial processes and productions (such as plant cultivation, advertising technologies, LED screens, etc.). It is believed that by 2035, LEDs will make up 98% of lighting technologies [4][5][6]. With the increasingly widespread use of LEDs, the method of controlling their light becomes especially important, which determines both the color and intensity of the light, as well as other LED operating parameters.…”