What is a PCB heat sink?
Heat sink connected in a PCB. The heat sink is a cooling method that transfers dissipated heat from PCB components into a cooling medium. Heat sink works on the principle of conduction which states that heat transfers from an area of high thermal resistance to an area of low thermal resistance.
What is a good example of a heat sink?
Passive Heat Sink A good example is a heat sink that doubles as the device enclosure. In this example, heat is moved from one or more heat generating components to one or more enclosure walls. These walls typically have a fin array exposed to the outside ambient air.
How can you improve heat sink performance?
Highly conductive material reduces heat sink thermal resistance. For similar geometry, copper heat sinks thermal resistance is less than the aluminum heat sink. Therefore heat sink performance can be increased by using a highly conductive material.
How do PCB boards reduce heat?
PCB Design Techniques to Dissipate Heat Heat sinks connected to thermal pads of hot parts. Using board materials with better thermal properties such as polyimides or metal core boards. Cooling fans as well as strategic component placement to put hot components into the circulating path of the fan.
How does a heat sink work?
Heatsinks work by absorbing heat from the CPU or GPU to which they are attached. As the CPU or GPU warms up, heat will transfer to these fins where it’s released using a fan. A fan is attached over the heatsink to circulate air. The fan runs in reverse, meaning it draws the hot air away from the CPU or GPU.
What is an aluminum heat sink?
An Aluminum heatsink is the most widely used product for thermal solutions. After oxygen and silicon, aluminum is the most common element in the Earth’s crust. The properties that make a aluminium heatsink popular include: Good thermal and electrical conductivity. Low density with a density ~ 2,700 kg/m3.
What is the material selection criteria for a heat sink?
Four selection criteria; thermal conductivity, coefficient of thermal expansion, density, and cost were abducted for selecting a laptop computer heat sink material in this paper. An ideal heat sink material exhibits high thermal conductivity, low coefficient of thermal expansion, low density, and low cost.
