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This paper designs a packaging structural of six-chip white LED down light with a total power of 15 W. The highest temperature of LED chip is 110.5°C, and the temperature of heat sink is 71.6 °C ∼73.2°C by finite element method (FEM). The experimental data are obtained by the thermocouple, with forward current of 700-mA at the ambient temperature of 35°C. The relative error between the simulation...
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