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PC7447AMGH1000LB Datasheet(PDF) 14 Page - ATMEL Corporation

No. de pieza PC7447AMGH1000LB
Descripción Electrónicos  PowerPC RISC microprocessor
PDF  44 Pages
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Fabricante Electrónico  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

PC7447AMGH1000LB Datasheet(HTML) 14 Page - ATMEL Corporation

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14
5387B–HIREL–07/05
PC7447A [Preliminary]
Figure 6-4.
Thermal Performance of Select Thermal Interface Material
6.4.4.1
Heat Sink Selection Example
For preliminary heat sink sizing, the die-junction temperature can be expressed as follows:
T
j = TI + Tr + (R
θJC + Rθint + Rθsa) × Pd
where:
T
j is the die-junction temperature
T
i is the inlet cabinet ambient temperature
T
r is the air temperature rise within the computer cabinet
RθJC is the junction-to-case thermal resistance
Rθint is the adhesive or interface material thermal resistance
Rθsa is the heat sink base-to-ambient thermal resistance
P
d is the power dissipated by the device
0
0.5
1
1.5
2
010
20
30
40
50
60
70
80
Silicone Sheet (0.006 in.)
Bare Joint
Floroether Oil Sheet (0.007 in.)
Graphite/Oil Sheet (0.005 in.)
Synthetic Grease
Contact Pressure (psi)



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