An Experimental Study of Conducted EMI Mitigation on the LED Driver using Spread Spectrum Technique
Journal Title: International Journal of Electronics and Telecommunications - Year 2016, Vol 62, Issue 3
Abstract
LED driver has the potential to interfere the system of electronic devices if the voltage and current change rapidly. Several previous studies presented various solutions to overcome this problem such as particular converter design, component design, electromagnetic interference (EMI) filters, and spread-spectrum techniques. Compared to other solutions, the spread-spectrum technique is the most potential way to reduce the EMI in LED applications due to its limited cost-size-weight. In this paper, the effectiveness of conducted EMI suppression performance and the evaluation of its effect on LED luminance using spread-spectrum techniques are investigated. Spread-spectrum is applied to the system by modifying the switching frequency by providing disturbances at pin IADJ. The disorder is given in the form of four signals, namely square, filtered-square, triangular, and sine disturbance signals. The highest level of the EMI suppression of about 31.89$\%$ is achieved when the LED driver is given 800 mVpp filtered-square waveform. The highest reduction power level occurs at fundamental frequency reference, when it is given 700 mVpp square disruption signal, is about 81.77$\%$ reduction. The LED luminance level will reduce by 85.2$\%$ when it is given the four waveforms disruption signals. These reductions occur as the switching frequency of the LED driver does not work on a fixed frequency, but it varies in certain bands. LED brightness level has a tendency to generate a constant value of 235 lux when it is given the disruption signals. This disturbance signal causes the dimming function on the system that does not work properly.
Authors and Affiliations
Mohammad Yanuar H, Risanuri Hidayat, Eka Firmansyah
Keywords
Related Articles
- EP ID EP200657
- DOI 10.1515/eletel-2016-0041
- Views 82
- Downloads 0
Stimuli design for SSVEP-based brain computer-interface
The paper presents a process of stimuli design for SSVEP-based brain computer-interface. A brain computer-interface can be used in direct communication between a brain and a computer, without using muscles. This device i...
Determination of the Material Relative Permittivity in the UHF Band by Using T and Modified Ring Resonators
The complete methodology of designing T- and modified ring resonators in the UHF band are presented in the paper. On the basis of proposed algorithms, the dedicated software tool has been elaborated in order to determine...
Quadrature Mapping, Saleh’s Representation, and Memory Models
In the literature, Saleh’s description of the AM/AM and AM/PM conversions occurring in communication power amplifiers (PAs) is classified as a representation without memory. We show here that this view must be revised. T...
Method for Filling and Sharpening False Colour Layers of Dual Energy X-ray Images
An X-ray scanning and image processing have a vast range of applications in the security. An image of a content of some package being passed for example to an airplane or to the court house may help to figure out if the...
Analysis and Design of Colpitts Oscillator for Short-range WSN
In this paper, analysis and design of colpitts oscillator with ability to transmit data at low output power with application in short-range wireless sensor networks such as MICS is described. Reducing the area required t...