![]() ![]() Electromechanical components (motors, switches, etc.).Large digital ICs that provide the bulk of computing power.Linear regulators as these are designed to regulate voltage by dissipating heat.MOSFETs used in power delivery or power regulation.Resistors or resistor arrays, specifically when used in power delivery. ![]() Some of the major components that are at risk of failure from high power dissipation include: To start, you'll need to determine which components are candidates for applying a heat sink by looking at power dissipating and datasheets. In addition, you might want to know some important information like reliability of any solder joints used on these components, reliability of nearby vias, and the reliability of the components themselves. The consideration here is whether certain components will reach an unsafe operating temperature, as well as whether that heat can affect any nearby components. All components, whether they are simple passives or complex logic circuits, will have some resistive losses. What Causes A PCB To Heat-Up and Need an SMD Heat Sink?Įlectrical energy is converted to thermal energy due to resistive losses. If you happen to be operating within safe limits in a high power device, you might need an SMD heat sink on certain components. Ultimately, this could save your components, your product, and even the operator. There are many things to consider when dealing with heat in your board, and it starts with determining power dissipation in your design during schematic capture. The heat-producing component being defective means the entire PCBA will need to be scrapped. Whenever a component reaches an extreme temperature that goes beyond a component's safe operating range, its lifetime will be greatly reduced or the component may fail immediately. In electronics, there is the possibility that your PCB can get pretty hot due to power dissipation in certain components. ![]()
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