In the LED lighting industry, heat conduction and heat dissipation is an important part of current lighting design. It can also be said that if the heat conduction and heat dissipation problems are not solved during the design process, this product is very likely to be a waste product! Moreover, the problem of heat conduction has not been solved, and the heat sink is no longer useful. Therefore, I will provide an idea for the heat conduction of aluminum substrates for your reference. As a particularly important thermal conductive material, aluminum substrates have special requirements in the wiring process. The following is a discussion of the most common high-power LEDs in the industry to discuss the use of copper foil for heat conduction. In the industry, the very common wiring method is as follows: The heat generated by the LED is only conducted to the aluminum substrate by the same copper foil surface as the LED heat sink. The cross-sectional view is as follows: If so, the thermal path can be interpreted like this: LED heat sink-----thermal grease------- copper foil as large as heat sink ------ aluminum substrate insulation layer ------ aluminum plate ------- heat sink It can be seen from the figure that the heat conduction path of the LED to the aluminum substrate is only the same as the heat sink of the LED. If we change our mindset, we will design the aluminum substrate as follows, as shown below: We all know that the thermal conductivity of copper is much larger than that of aluminum. We designed it so that the copper foil layer of the LED heat sink is as large as possible, and the heat conducted by the LED heat sink is fast on the copper foil layer. Conducted open, and then conducted to the lower aluminum plate, artificially increase the heat conduction path, will greatly reduce the temperature of the LED heat sink, as long as possible to extend the working life of the LED. September Weekly deals,High Quality September Weekly deals,September Weekly deals Details, CN ZHONGSHAN G-LIGHTS LIGHTING CO., LTD. , https://www.glightsled.com
Discussion on circuit design and heat conduction of aluminum substrate
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