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Heat Dissipation Performance of the Nichia NVSxx19C Series LEDs at the Module Level

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Heat Dissipation Performance of the Nichia NVSxx19C Series LEDs at the Module Level

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This application note provides the results of the evaluation of the heat dissipation capabilities of the NVSxx19C series LEDs at the module level with an emphasis on the difference in the LED electrode configuration between the NVSx219C and NVSx119C LEDs. Nichia’s NVSxx19C series LEDs offer two different types of electrode designs: LEDs with one cathode and one anode electrode (i.e. NVSx119C) and LEDs with an electrically isolated die heat sink in addition to these two electrodes (i.e. NVSx219C). The thermal resistances (RθJS) from the LED die to the TS measurement point are the same for both of those types. However, the LED type chosen for the design of the module (i.e. electrodes/heat sink pad on the back of the LED package) and/or the soldering pad pattern of the printed circuit board (PCB) may cause the thermal path to change causing a difference in the heat dissipation.

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