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Heat Transfer
book

Heat Transfer

by Younes Shabany
December 2009
Intermediate to advanced content levelIntermediate to advanced
523 pages
18h 30m
English
CRC Press
Content preview from Heat Transfer
118 Heat Transfer: Thermal Management of Electronics
Example 6.2
Consider a 40 mm × 40 mm × 2 mm package that is exposed to laminar forced
convection airflow on its case. The junction-to-case, junction-to-board, and
board-to-air thermal resistances of this package are 4°C/W, 10°C/W, and 25°C/W,
respectively, and it dissipates 10 W. What is the minimum air velocity to keep the
junction temperature of this package below 105°C if the ambient air temperature
is 25°C? Neglect radiation heat transfer rate.
Solution
The air velocity affects case-to-air and therefore junction-to-air thermal resistances
of this package. To keep its junction temperature ...
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Publisher Resources

ISBN: 9781439814680