Typical Package Level Application
This package-level model shows a quarter of the package with
Object-based model setup and automated meshing are used for fast problem definition. The computational mesh includes 38,000 cells, and uses unstructured meshing to minimize the overall cell count, while clustering the grid for best accuracy. Icepak's material database makes property specification easy and its ability to model anisotropic or temperature-dependent conductivity contribute to accuracy.
The analysis consists of conduction heat transfer through the package, with the package exposed to convective boundary conditions, as follows:
Alternate heat transfer boundary conditions that might be used include specified temperature, specified heat flux, or specified radiation conditions. The solution to the conduction problem is obtained in 10 CPU seconds, for the mesh considered here.
The Icepak results indicate temperature distribution on the chip, copper base plate, the lead frame, and the leads. For clarity, the temperature distribution in the plastic is not shown here. The maximum temperature predicted is 28 C.
Additional analyses can be performed after varying the different design parameters.
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