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Multiple Heat Source Thermal Modeling and Transient Analysis of LEDs

Author

Listed:
  • Anton Alexeev

    (Department of Electrical Engineering, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands)

  • Grigory Onushkin

    (Research, Signify, High Tech Campus 7, 5656 AE Eindhoven, The Netherlands)

  • Jean-Paul Linnartz

    (Department of Electrical Engineering, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
    Research, Signify, High Tech Campus 7, 5656 AE Eindhoven, The Netherlands)

  • Genevieve Martin

    (Research, Signify, High Tech Campus 7, 5656 AE Eindhoven, The Netherlands)

Abstract

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.

Suggested Citation

  • Anton Alexeev & Grigory Onushkin & Jean-Paul Linnartz & Genevieve Martin, 2019. "Multiple Heat Source Thermal Modeling and Transient Analysis of LEDs," Energies, MDPI, vol. 12(10), pages 1-28, May.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:10:p:1860-:d:231509
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    Citations

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    Cited by:

    1. Marc van der Schans & Joan Yu & Genevieve Martin, 2020. "Digital Luminaire Design Using LED Digital Twins—Accuracy and Reduced Computation Time: A Delphi4LED Methodology," Energies, MDPI, vol. 13(18), pages 1-19, September.
    2. László Pohl & Gusztáv Hantos & János Hegedüs & Márton Németh & Zsolt Kohári & András Poppe, 2020. "Mixed Detailed and Compact Multi-Domain Modeling to Describe CoB LEDs," Energies, MDPI, vol. 13(16), pages 1-39, August.
    3. Marcin Janicki & Przemysław Ptak & Tomasz Torzewicz & Krzysztof Górecki, 2020. "Compact Thermal Modeling of Modules Containing Multiple Power LEDs," Energies, MDPI, vol. 13(12), pages 1-9, June.
    4. Genevieve Martin & Christophe Marty & Robin Bornoff & Andras Poppe & Grigory Onushkin & Marta Rencz & Joan Yu, 2019. "Luminaire Digital Design Flow with Multi-Domain Digital Twins of LEDs," Energies, MDPI, vol. 12(12), pages 1-28, June.
    5. Krzysztof Górecki & Przemysław Ptak, 2021. "Compact Modelling of Electrical, Optical and Thermal Properties of Multi-Colour Power LEDs Operating on a Common PCB," Energies, MDPI, vol. 14(5), pages 1-21, February.

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