Multiple heat source thermal modeling and transient analysis of LEDs

Anton Alexeev; Grigory Onushkin; Jean Paul Linnartz; Genevieve Martin

doi:10.3390/en12101860

Multiple heat source thermal modeling and transient analysis of LEDs

Anton Alexeev (Corresponding author), Grigory Onushkin, Jean Paul Linnartz, Genevieve Martin

Research output: Contribution to journal › Article › Academic › peer-review

20 Citations (Scopus)

225 Downloads (Pure)

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.

Original language	English
Article number	1860
Number of pages	28
Journal	Energies
Volume	12
Issue number	10
DOIs	https://doi.org/10.3390/en12101860
Publication status	Published - 15 May 2019

Funding

Funding: This research has received funding from the European Union’s Horizon 2020 research and innovation program through the H2020 ECSEL project Delphi4LED (grant agreement number: 692465) (2016–2019). Co-financing of the Delphi4LED project by the national R&D funding organization of the participating countries. Additional information is available on: www.DELPHI4LED.eu.

Keywords

Dynamic thermal compact model
Led
Multiple heat source
Phosphor light conversion
Secondary heat path
Silicone dome
Structure function
Thermal characterization
Thermal transient analysis
dynamic thermal compact model
thermal characterization
structure function
silicone dome
LED
thermal transient analysis
secondary heat path
phosphor light conversion
multiple heat source

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.3390/en12101860

published versionFinal published version, 6.89 MB

Cite this

@article{d72992e0808944ccb25b56b9242cf486,

title = "Multiple heat source thermal modeling and transient analysis of LEDs",

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.",

keywords = "Dynamic thermal compact model, Led, Multiple heat source, Phosphor light conversion, Secondary heat path, Silicone dome, Structure function, Thermal characterization, Thermal transient analysis, dynamic thermal compact model, thermal characterization, structure function, silicone dome, LED, thermal transient analysis, secondary heat path, phosphor light conversion, multiple heat source",

author = "Anton Alexeev and Grigory Onushkin and Linnartz, {Jean Paul} and Genevieve Martin",

year = "2019",

month = may,

day = "15",

doi = "10.3390/en12101860",

language = "English",

volume = "12",

journal = "Energies",

issn = "1996-1073",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "10",

}

TY - JOUR

T1 - Multiple heat source thermal modeling and transient analysis of LEDs

AU - Alexeev, Anton

AU - Onushkin, Grigory

AU - Linnartz, Jean Paul

AU - Martin, Genevieve

PY - 2019/5/15

Y1 - 2019/5/15

N2 - 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.

AB - 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.

KW - Dynamic thermal compact model

KW - Led

KW - Multiple heat source

KW - Phosphor light conversion

KW - Secondary heat path

KW - Silicone dome

KW - Structure function

KW - Thermal characterization

KW - Thermal transient analysis

KW - dynamic thermal compact model

KW - thermal characterization

KW - structure function

KW - silicone dome

KW - LED

KW - thermal transient analysis

KW - secondary heat path

KW - phosphor light conversion

KW - multiple heat source

UR - http://www.scopus.com/inward/record.url?scp=85066822898&partnerID=8YFLogxK

U2 - 10.3390/en12101860

DO - 10.3390/en12101860

M3 - Article

AN - SCOPUS:85066822898

SN - 1996-1073

VL - 12

JO - Energies

JF - Energies

IS - 10

M1 - 1860

ER -

Multiple heat source thermal modeling and transient analysis of LEDs

Abstract

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this