Thermal Characterization of Solid State Lighting
Technology Overview
Abstract
LEDs offer improved efficiency compared with conventional lighting, but operate at much lower temperatures and need to be cooled by conduction rather than radiation. This webinar describes the thermal characterisation of the heat flow path of LED devices, e.g. Class I luminairs through to the ambient air. Challenges in removing the heat are described, and the impact of temperature on reliability and the lumious flux and colour. Benefits of a transient characterisation approach is advocated as LEDs are controlled with pulsed width modulation (PWM) of the input current, requiring the dynamic thermal resistance for design. Use of T3Ster and T3Ster® TeraLED® are reported, with a detailed description of the operation of these devices and the subsequent analysis of the results to create structure functions which describe the thermal resistances and capacitances in the heat flow path.
Duration: 01:28:08
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