In integrated circuits, excessive temperatures can negatively affect functions, components and the board itself. So, what are the reasons for the serious heating of the PCB board?
1. The components are placed incorrectly
Some high-power equipment requires natural or forced ventilation to dissipate heat. Without proper airflow to dissipate heat, the PCB will accumulate most of the heat, causing the temperature to rise, resulting in degraded or damaged circuit performance. Care should be taken not to place sensitive components near components that dissipate a lot of heat; temperatures can be kept within safe limits through proper heat dissipation and natural or forced cooling.
2. Environmental and external thermal factors
When using a PCB in an extreme temperature environment, if the temperature conditions in the target environment are not considered in the design, the electronic components may be subjected to excessive stress; general electronic component manufacturers will provide specifications applicable within a specific temperature range .
3. Incorrect selection of parts and materials
Failure to follow recommended usage guidelines during electronic component material selection can result in thermal issues. When selecting electronic components, it is important to review detailed data and consider all relevant information regarding power dissipation, thermal resistance, temperature limitations and cooling techniques. Also, do a quick wattage calculation on the resistor to make sure you choose the right wattage rating for the application. Another issue is the choice of PCB dielectric material, the printed circuit board itself must be able to withstand the worst-case thermal conditions.
4. Defects in PCB design and manufacturing
Poor layout and manufacturing process can cause PCB thermal problems. Improper soldering can hinder heat dissipation, and insufficient trace width or copper area can also lead to increased temperatures. To prevent thermal issues, designers must reduce heat dissipation and use other cooling techniques when natural cooling is insufficient; thermally optimized design requires attention to component specifications, PCB layout, PCB dielectric materials, and environmental conditions.
