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30-06-2008 #3The chip dissipates the heat via the ground pins, center 3 pins on each side. A heat sink is a good idea for currents over 1.0a.
Picture is of an old 486 heatsink, in open air running at 2.5a it gets quite hot and so a cooling fan could be used additionally.
I think its going to come down to the users individual preference, i myself like to keep things COOOOL !
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