Get rid of the heat

Smith, Matt
July 2004
Portable Design;Jul2004, Vol. 10 Issue 7, p14
The combination of shrinking form factors and increasing performance has created several temperature control challenges for portable-system designers. Increased performance is usually achieved by higher clock speeds and higher integration, but they result in higher power dissipation. Package sizes are also shrinking, which doubles the challenge to keep everything cool. Thermal issues are further compounded by restrictions on weight, placement of vents, weatherproofing, and other considerations. When space permits, forced convection using fans is still the most effective means of removing heat. The combination of a small heat sink or heat pipe with a fan provides a continuous air flow that will lower the thermal impedance between the inside of the unit and outside ambient.


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