Industry News

LED Heat Sink

2018-06-20
The LED heat dissipation technology was born in 2000. It is made of semiconductor light-emitting diodes. The working principle is radiation and electroluminescence. It is the most common heat dissipation method. Aluminum radiator fins are used as part of the housing to increase the heat dissipation area.

The LED heat sink can be used to control the junction temperature and less than the maximum junction temperature of the semiconductor device. LED heat sinks are mostly chosen for materials with high thermal conductivity. Currently, LED radiators used in domestic and foreign electronic complete products are generally made of copper, aluminum, and iron. The most used aluminum is (thermal conductivity 2.12 W/cm·°C). Copper has a high thermal conductivity (3.85 W/cm·°C), but the cost of non-aluminum is low. In some small electronic products, some of them use a heat sink made of steel, although the heat transfer of steel The conductivity is a little worse (0.46 W/cm·°C), but its cost is relatively low, so that it can be used in products that are not very demanding.

In most cases, the thicker the material of the LED heat sink and the larger the surface area, the better the heat dissipation effect, but in the case that the actual temperature of the semiconductor power device can be guaranteed to be less than the maximum junction temperature in the normal operating state, Then, as much as possible, LED radiators with a small amount of material should be used.