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Ten tips for streamlining PCB thermal design   

Many aspects of a printed circuit board’s (PCB) performance are determined during detailed design, for example, making a trace a specific length for timing reasons. Timing issues are also affected by temperature differences between components. Thermal issues with the PCB design are largely locked in during the component (i.e. chip package) selection and layout phases. After this point only remedial actions are possible if components are found to run too hot. 

We advocate a top-down approach starting at the system or enclosure level in order to understand the flow environment for the electronics, which is critical for air-cooled electronics. Assumptions made about the uniformity of the airflow in early design that subsequently to prove unachievable can have a disastrous impact on the commercial viability of the product and meeting the market window.

This white paper provides an overview of the key considerations in PCB thermal design.

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