Proceedings ArticleDOI
Microcontroller-based quadratic buck converter used as led lamp driver
A.E. Demian,J. Reginaldo de Britto,L.C. de Freitas,Valdeir J. Farias,Ernane Antônio Alves Coelho,J.B. Vieira +5 more
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In this article, a new proposal for driving LED lamps through the use of a micro-controlled quadratic buck DC/DC converter is presented, where the main focus is to improve the LED driver's characteristics using the micro-controller PIC16F873A.Abstract:
This paper presents a new proposal for driving LED lamps through the use of a micro controlled quadratic buck DC/DC converter The main focus is to improve the LED driver's characteristics using the microcontroller PIC16F873A, thus achieving greater durability and efficiency Mathematical analyses and experimental results are presented in this paperread more
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Journal ArticleDOI
Quadratic step-down dc-dc converters based on reduced redundant power processing approach
TL;DR: In this paper, a family of switching step-down dc-dc converters based on the principle of reduced redundant power processing (R 2 P 2 ) is presented, which states that the power transfer from input port to output port on interconnected converters can be reduced, if a non-cascading connection is used.
Proceedings ArticleDOI
Open-loop small-signal transfer functions of the quadratic buck PWM DC-DC converter in CCM
TL;DR: The small-signal model of the open-loop lossy quadratic buck converter operating in continuous conduction mode (CCM) is presented and the dc, averaged, and the low-frequency linear equivalent models are developed using the circuit averaging technique.
Proceedings ArticleDOI
Analysis of Quadratic Step-Down DC-DC Converters Based on Noncascading Structures
TL;DR: In this paper, switching step-down dc-dc converters based on the principle of reduced redundant power processing (R2P2) are presented, which states that the non-cascading connection of DC-dc basic converters increases the efficiency on array of converters from the theoretical point of view.
Journal Article
Solid-state lighting: lamps, chips and materials for tomorrow
TL;DR: In this paper, the authors give a brief historical and forward-looking overview of conventional and SSL lighting technologies, and describe some of the simplest but most important lamp, chip, and materials design choices that will need to be made.
Proceedings ArticleDOI
A stability issue with current mode control flyback converter driving LEDs
H. M. Pang,M. H. Bryan Pong +1 more
TL;DR: In this article, the design of stable power converter for LED lamp has been discussed and a flyback topology is used together with current-controlled current mode control to solve the output feedback instability.
References
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Illumination with solid state lighting technology
Daniel A. Steigerwald,Jerome Chandra Bhat,D. Collins,R.M. Fletcher,M.O. Holcomb,M. J. Ludowise,Paul S. Martin,Serge L Rudaz +7 more
TL;DR: In this article, the authors describe the current state of high-power LED technology and the challenges that lay ahead for development of a true "solid state lamp" and demonstrate record performance and reliability for high power colored and white LEDs and show results from the worlds first 100-plus lumen white LED lamp.
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High-power phosphor-converted light-emitting diodes based on III-Nitrides
TL;DR: In this article, the authors proposed a solution for the phosphor conversion of light-emitting diode light for white light sources and some monochrome applications, which takes into account specific issues if aimed at high power output.
Journal ArticleDOI
Solid-State Lighting: Toward Superior Illumination
Michael Shur,R. Zukauskas +1 more
TL;DR: Two approaches for generating white light from solid-state sources based on phosphor LEDs and multichip LED lamps are compared, which offer many advantages, such as chromaticity control, better light quality, and higher efficiency.
Journal ArticleDOI
Solid-state lighting: lamps, chips, and materials for tomorrow
TL;DR: In this article, the authors give a brief historical and forward-looking overview of conventional and SSL lighting technologies, and describe some of the simplest but most important lamp, chip, and materials design choices that will need to be made.
Journal ArticleDOI
Evaluation of a low cost permanent emergency lighting system based on high efficiency LEDs
Manuel Rico-Secades,A.J. Calleja,Javier Ribas,Emilio López Corominas,J.M. Alonso,Jesus Cardesin,J. Garcia-Garcia +6 more
TL;DR: In this paper, a 30-lm and 1-h Permanent Emergency Lighting System (PELS) with high-efficiency LEDs is proposed for emergency exit indication and lighting in critical or strategic points.