Delphi4LED — from measurements to standardized multi-domain compact models of LED: A new European R&amp;D project for predictive and efficient multi-domain modeling and simulation of LEDs at all integration levels along the SSL supply chain

Bornoff, Robin; Hildenbrand, V. D.; Lugten, Sangye; Martin, Geneviève; Marty, C.; Poppe, A.; Rencz, M.; Schilders, W.H.A.; Yu, Joan

doi:10.1109/therminic.2016.7749048

Cited by 16 publications

(11 citation statements)

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“…It was instrumental in both coining the term 'compact thermal model' (CTM) and elaborating a methodology to extract such models to accurately represent packaged integrated circuits thermally, regardless of the thermal operating environment in which they operated [1][2][3]. A follow-up project, SEED (Supplier Evaluation and Exploitation of DELPHI), saw an evaluation of the DELPHI methodology by component suppliers [4]. A final project, PROFIT (Prediction of Temperature Gradients Influencing the Quality of Electronic Products), extended the DELPHI methodology to the transient domain [5].…”

Section: Introductionmentioning

confidence: 99%

“…There is a coupling between the optical, electrical and thermal behavior of an LED to the extent where a model needs to represent all three 'physics.' The Delphi4LED project has proposed [4,5] that this multi-domain model be considered in two parts: an opto-electro model that is simulated in conjunction with a thermal model (Figure 1). The opto-electro model requires forward current and operating chip junction temperature as input and provides power dissipation, voltage drop, emitted optical energy and luminous flux as output.…”

Section: Introductionmentioning

confidence: 99%

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Extraction of Boundary Condition Independent Dynamic Compact Thermal Models of LEDs—A Delphi4LED Methodology

Bornoff

2019

Energies

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Multi-domain electro-thermal-optical models of LEDs are required so that their thermal and optical behavior may be predicted during a luminaire design process. Today, no standardized approach exists for the extraction of such models. Therefore, models are not readily provided by LED suppliers to end-users. This results in designers of LED-based luminaires wasting time on LED characterization and ad hoc model extraction themselves. The Delphi4LED project aims to address these deficiencies by identifying standardizable methodologies to extract both electro-optical and thermal compact models of LEDs that together can be used in a multi-domain simulation context. This article describes a methodology to extract compact thermal models of LEDs that are dynamic, in that they accommodate transient thermal effects, and are boundary condition-independent, in that their accuracy is independent of their thermal operating environment. Such models are achieved by first proposing an equivalent thermal nodal network topology. The thermal resistances and capacitances of that network are identified by means of optimization so that the transient thermal response of the network matches that of either an equivalent calibrated 3D thermal model or a transient thermal measurement of a physical sample. The accuracy of the thermal network is then verified by comparing the thermal compact model with a 3D detailed model, which predicts thermal responses within a 3D system-level model.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extraction of Boundary Condition Independent Dynamic Compact Thermal Models of LEDs—A Delphi4LED Methodology

Bornoff

2019

Energies

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“…This allows luminaire level "hot lumens" calculations under arbitrary thermal conditions. The LED multi-domain measurement and modelling techniques originating from our department contributed to the successful definition and launch of a new H2020 ECSEL project titled Delphi4LED (www.delphi4LED.org) [37,38,45].…”

Section: Thermal and Multi-domain Modelling Of Leds And Led Applicationsmentioning

confidence: 99%

BME VIK Annual Research Report on Electrical Engineering and Computer Science 2016

Charaf

Harsányi

Poppe

et al. 2017

Period. Polytech. Elec. Eng. Comp. Sci.

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Preface Since being established in 1949, the Faculty of Electrical Engineering and Informatics (VIK) BME has played a flagship role in the development of electronics, IT and computer science in Hungary.We László Jakab (dean, BME VIK) János Levendovszky (vice-dean in charge of scientific affairs, BME VIK) are proud of combining engineering applications with sound scientific results, which is the assurance of high-level industrial collaboration leading to novel results and innovation. The various collaborations with our industrial partners has made it clear that the industry expects methods and results which make their industrial processes more effective and increase productivity and quality. Thus, participation in these collaborations give a competitive edge and ensure the continuous development of VIK. These factors have positioned our Department of Automation and Applied InformaticsDepartment of Automation and Applied Informatics (AUT) is one of the largest and dynamically developing departments at BME with diverse scope competences such as control theory, embedded systems, software modelling, applied software development, Internet of Things, power electronics, mechatronics, and many others. The department's main activities are education, research and development. Training versatile electrical and software engineers with solid practical knowledge is our top priority. Our profile also includes developing high quality software and hardware solutions for industry partners. All of our activities are backed by strong research background.In 2016, the department organized and hosted a number of domestic and international events. In cooperation with the industry, AUT has organized the IoT4U conference. It was dedicated to Internet of Things, cloud and data management as well as the integration of IoT into various formats. RobonAUT, the yearly domestic amateur robotics contest was organized by the department in February 2016. The yearly contest is open to teams of students, organized either in student projects within the department or independent research teams.The next sections summarize the key research results of the department in year 2016. Software Development Methods and Mobile PlatformsThe diversity of mobile platforms necessitates the development of the same mobile application for all major mobile platforms, what requires considerable development effort. Mobile application developers are multiplatform developers, but they still prioritize the platforms, therefore, not all platforms are equally important for them. Appropriate methods, processes and tools are required to support the development in order to achieve better productivity.The research on educational mobile applications that adapt to the mental state of the user required a method for estimating the difficulty of tasks found in the serious games. There are generated or random assignments where the effort required from the user is not known or cannot be estimated in advance.61 (2) IoT and Smart CityThe Internet of Things (IoT) is transforming the surroun...

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“…Compact thermal models (CTMs) are widely used in modern production and in optimization processes (particularly in the semiconductor industry) [1][2][3]. One of the goals of our European Union project Delphi4LED [4,5] is the standardization of the CTMs for LEDs.…”

Section: Introductionmentioning

confidence: 99%

Multiple Heat Source Thermal Modeling and Transient Analysis of LEDs

et al. 2019

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Thermal transient testing is widely used for LED characterization, derivation of compact models, and calibration of 3D finite element models. The traditional analysis of transient thermal measurements yields a thermal model for a single heat source. However, it appears that secondary heat sources are typically present in LED packages and significantly limit the model’s precision. In this paper, we reveal inaccuracies of thermal transient measurements interpretation associated with the secondary heat sources related to the light trapped in an optical encapsulant and phosphor light conversion losses. We show that both have a significant impact on the transient response for mid-power LED packages. We present a novel methodology of a derivation and calibration of thermal models for LEDs with multiple heat sources. It can be applied not only to monochromatic LEDs but particularly also to LEDs with phosphor light conversion. The methodology enables a separate characterization of the primary pn junction thermal power source and the secondary heat sources in an LED package.

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Delphi4LED — from measurements to standardized multi-domain compact models of LED: A new European R&D project for predictive and efficient multi-domain modeling and simulation of LEDs at all integration levels along the SSL supply chain

Cited by 16 publications

References 2 publications

Extraction of Boundary Condition Independent Dynamic Compact Thermal Models of LEDs—A Delphi4LED Methodology

Extraction of Boundary Condition Independent Dynamic Compact Thermal Models of LEDs—A Delphi4LED Methodology

BME VIK Annual Research Report on Electrical Engineering and Computer Science 2016

Multiple Heat Source Thermal Modeling and Transient Analysis of LEDs

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