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Cool design


When it comes to cooling, every application has its own requirement. So how do you specify a fan to cool a power supply? By Andy Bryars and Ian Macleod.

A power supply is the very heart – the engine – of a circuit or system. Without it, other parts of the circuit will not function properly or, generally, not at all. It is therefore essential that the power supply operates reliably. A major factor in reducing power supply (psu) failure is to ensure that it runs well within its upper temperature limit for safe operation.

For some applications, natural convection is sufficient to take heat away from the psu. However, for most applications, the use of an efficient, quiet fan is the best way to maintain a safe working temperature within the power supply.

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Graham Pitcher

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