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Thermal Design of NVSU119C(U375, U385, U395, U405) LEDs

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Thermal Design of NVSU119C(U375, U385, U395, U405) LEDs

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This application note covers the effect on the TJ when a board with one LED is driven with two different heat dissipation configurations and the TJ of a board with multiple LEDs. This information can be used as a reference for thermal design. The light output of LEDs decreases due to the effect of heat generation. When LEDs are operated above the maximum LED junction temperature (TJMAX), the reliability will drop significantly. In order to use the NVSU119C LED with high performance and high reliability, it is important to design the heat dissipation so that the junction temperature TJ does not exceed 125°C for the TJMAX for U375 and U385 ranks and 130°C for theTJMAX for U395 and U405 ranks.

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