Constant functioning of circuits in devices generates heat which can result in overheating which may damage the device or lead to shorting. Heat dissipation and air ventilation are essential. This applies to printed circuit boards as well. Thermal management is one important aspect of PCB manufacturing and assembly. It is the process of keeping the temperature of electrical systems and electronic components within the specified limits. It is of utmost importance for designers to understand proper thermal management as this will maximize the final product’s performance. Appropriate thermal management helps reduce the chance of board failure, and improve the system’s overall functionality. PCB manufacturers and electronic assembly services providers use different techniques to achieve thermal management of PCBs. Especially for high heat generating applications, they develop heat sink PCBs.

Heat Sink – Introduction and Types Explained

Heat sinks are crucial elements in the designing and manufacturing of PCBs. Engineered using a high thermal conductivity material, they are known for maintaining the effectiveness of several electronic components, mainly in power distribution systems. The main function of the heat sink is to keep the electronic system cool by facilitating heat dissipation and air exchange. This passive element removes heat from any electronic component or assembly and dissipates heat into the air using thermal conduction. Heat sinks are utilized in active, passive, and hybrid PCB configurations.

  • Active Heat Sinks: This type of heat sink uses additional products or processes to improve its cooling capacity. Powered processes such as blowers, fans, and water pumps to increase the rate of heat transmission. In most electronic applications, these cooling products run off the internal power supply. Active heat sinks have moving parts; thus, they are not ideal for long-term applications.
  • Passive Heat Sinks: Unlike active heat sinks, these heat sinks do not require any products for cooling a component. Heat dissipation is achieved through the convection process. Passive heat sinks offer reliable results. Many experts recommend maintaining the air flow across the fins of this heat sink. They act as a standalone solution because they don’t use any cooling method.
  • Hybrid Heat Sinks: As the name implies, these heat sinks combine the aspects of both active and passive heat sinks. Such configurations are less common. Hybrid heat sinks use control systems to keep the electronic systems cool based on temperature requirements.
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Why Are Heat Sink PCBs So Popular?

Heat dissipation plays a key role in ensuring the effective functioning of your PCBs. Heat sinks in the circuit board ensure the board temperature cannot exceed its acceptable or preset range. The following notable benefits of heat sink PCBs contribute to their popularity. Let’s have a look at them.

  • Heat sinks are a great way to improve the overall performance of the final product.
  • In the long run, heat sinks are an economical solution available for thermal issues.
  • Heat sinks are the preferred option when you want to operate the product without any cooling system. The thermal performance is achieved by gradually releasing heat from the components placed outside the circuit boards.
  • Heat sinks are not only ideal for high-powered chips, but they can cool down the other electronic parts or components on a PCB, such as power regulators, batteries, and more.
  • Fans and power blowers may have issues with high power consumption and noise levels. Heat sinks can minimize these issues.
  • Heat sinks can increase the lifespan of PCB by up to 50%.

Applications of Heat Sink PCBs

Heat sink PCBs are used in several challenging applications that require extra cooling or generate excess heat. Similar to conventional PCBs, they provide the same high-performance characteristics with the added internal thermal heat sink. Here are some common applications of heat sink PCBs:

  • Power electronics
  • Semiconductors
  • LEDs
  • High-speed switching power supplies
  • HVAC systems
  • Consumer Electronics
  • Industrial facilities

Heat sink PCBs can prevent overheating of electronic components. Overheating can cause an expansion in the PCBs and damage the product. Therefore the best quality materials should be used to manufacture heat sink PCBs. In the case of outsourcing, it is important to get them from reliable and trusted names in the marketplace like Suntronic Inc. These PCBs can be customized to fulfill customer’s requirements. With years of industry presence and skilled employees, Suntronic Inc. offers high-quality and performance-driven heat sink PCBs designed in accordance with industry standards.