Influence of a Thermal Pad on Selected Parameters of Power LEDs

Krzysztof Górecki, Przemysław Ptak, Tomasz Torzewicz and Marcin Janicki
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Krzysztof Górecki: Department of Marine Electronics, Gdynia Maritime University, Morska 81-87, 81-225 Gdynia, Poland
Przemysław Ptak: Department of Marine Electronics, Gdynia Maritime University, Morska 81-87, 81-225 Gdynia, Poland
Tomasz Torzewicz: Department of Microelectronics and Computer Science, Technical University of Łódź, Wólczańska 221, 90-924 Łódź, Poland
Marcin Janicki: Department of Microelectronics and Computer Science, Technical University of Łódź, Wólczańska 221, 90-924 Łódź, Poland

Energies, 2020, vol. 13, issue 14, 1-13

Abstract: This paper is devoted to the analysis of the influence of thermal pads on electric, optical, and thermal parameters of power LEDs. Measurements of parameters, such as thermal resistance, optical efficiency, and optical power, were performed for selected types of power LEDs operating with a thermal pad and without it at different values of the diode forward current and temperature of the cold plate. First, the measurement set-up used in the paper is described in detail. Then, the measurement results obtained for both considered manners of power LED assembly are compared. Some characteristics that illustrate the influence of forward current and temperature of the cold plate on electric, thermal, and optical properties of the tested devices are presented and discussed. It is shown that the use of the thermal pad makes it possible to achieve more advantageous values of operating parameters of the considered semiconductor devices at lower values of their junction temperature, which guarantees an increase in their lifetime.

Keywords: power LEDs; thermal pads; thermal resistance; measurements; optical efficiency; self-heating; electronics cooling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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