A Single-Stage LED Driver Based on BCM Boost Circuit and $LLC$ Converter for Street Lighting System

2015 ◽  
Vol 62 (9) ◽  
pp. 5446-5457 ◽  
Author(s):  
Yijie Wang ◽  
Yueshi Guan ◽  
Kailin Ren ◽  
Wei Wang ◽  
Dianguo Xu
2014 ◽  
Vol 7 (6) ◽  
pp. 1374-1383 ◽  
Author(s):  
Yijie Wang ◽  
Yueshi Guan ◽  
Xinyu Liang ◽  
Wei Wang ◽  
Dianguo Xu

2018 ◽  
Vol 33 (10) ◽  
pp. 8710-8727 ◽  
Author(s):  
Satit Mangkalajan ◽  
Chainarin Ekkaravarodome ◽  
Kamon Jirasereeamornkul ◽  
Phatiphat Thounthong ◽  
Kohji Higuchi ◽  
...  

Author(s):  
Chun-An Cheng ◽  
Hung-Liang Cheng ◽  
Chien-Hsuan Chang ◽  
Fu-Li Yang ◽  
Tsung-Yuan Chung

2020 ◽  
pp. 87-97
Author(s):  
Sourish Chatterjee ◽  
Biswanath Roy

In an office space, an LED-based lighting system allows you to perform the function of a data transmitter. This article discusses the cost-effective design and development of a data-enabled LED driver that can transmit data along with its receiving part. In addition, this paper clearly outlines the application of the proposed VLC system in an office environment where ambient light interference is a severe issue of concern. The result shows satisfactory lighting characteristics in general for this area in terms of average horizontal illuminance and illuminance uniformity. At the same time, to evaluate real-time and static communication performance, Arduino interfaced MATLAB Simulink model is developed, which shows good communication performance in terms of BER (10–7) even in presence of ambient light noise with 6 dB signal to interference plus noise ratio. Our designed system is also flexible to work as a standalone lighting system, whenever data communication is not required.


Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1340
Author(s):  
Yih-Her Yan ◽  
Hung-Liang Cheng ◽  
Chun-An Cheng ◽  
Yong-Nong Chang ◽  
Zong-Xun Wu

A novel single-switch single-stage high power factor LED driver is proposed by integrating a flyback converter, a buck–boost converter and a current balance circuit. Only an active switch and a corresponding control circuit are used. The LED power can be adjusted by the control scheme of pulse–width modulation (PWM). The flyback converter performs the function of power factor correction (PFC), which is operated at discontinuous-current mode (DCM) to achieve unity power factor and low total current harmonic distortion (THDi). The buck–boost converter regulates the dc-link voltage to obtain smooth dc voltage for the LED. The current–balance circuit applies the principle of ampere-second balance of capacitors to obtain equal current in each LED string. The steady-state analyses for different operation modes is provided, and the mathematical equations for designing component parameters are conducted. Finally, a 90-W prototype circuit with three LED strings was built and tested. Experimental results show that the current in each LED string is indeed consistent. High power factor and low THDi can be achieved. LED power is regulated from 100% to 25% rated power. Satisfactory performance has proved the feasibility of this circuit.


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