A Study on the 150W High-power Flood LED Lighting Engine using Heat Spreader

Abstract

In this paper, design and heat dissipation of the LED lighting engine using the heat spreader were investigated to reduce weight and improve heat dissipation of 150W LED light. LED optical light engine A with heat spreader was lighter 3.8kg than LED optical light engine B with fin type heat sink. As a result of heat dissipation analysis, the maximum and average temperatures of the LED package using LED lighting engine A were lowered 2.16℃ and 3.45℃, than those using LED lighting engine B, respectively. The surface temperatures of the PCB in LED lighting engine A were lower than those of LED lighting engine B. The temperature difference between LED package and PCB of LED lighting engine A and B were 2.76℃ and 2.88℃, respectively. The thermal resistances of LED lighting engine A and B were measured 0.418K/W, 0.411K/W and junction temperatures were measured to be 80.47℃, 85.58℃, respectively. CFD analysis showed that thermal dissipation performance of LED lighting engine A were improved than LED lighting engine B in terms of thermal image surface temperature distribution and thermal resistance. The weight of LED lighting engine A was reduced by 45% compared to the LED lighting engine B.