Influence of a Thermal Pad on Selected Parameters of Power LEDs

Energies

Krzysztof Górecki¹  Przemysław Ptak¹  Tomasz Torzewicz²  Marcin Janicki² 

[1] Department of Marine Electronics, Gdynia Maritime University, Morska 81-87, 81-225 Gdynia, Poland;Department of Microelectronics and Computer Science, Technical University of Łódź, Wólczańska 221, 90-924 Łódź, Poland;

关键词: power LEDs;    thermal pads;    thermal resistance;    measurements;    optical efficiency;    self-heating;   

DOI  :  10.3390/en13143732

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown