MPC8321E Freescale Semiconductor, Inc, MPC8321E Datasheet - Page 72

• Manufacturer Part Number: MPC8321E
• Description: Mpc8321e Powerquicc Ii Pro Processor
• Manufacturer: Freescale Semiconductor, Inc

Thermal
where:
R
change the case-to-ambient thermal resistance, R
sink, the air flow around the device, the interface material, the mounting arrangement on printed-circuit
board, or change the thermal dissipation on the printed-circuit board surrounding the device.
To illustrate the thermal performance of the devices with heat sinks, the thermal performance has been
simulated with a few commercially available heat sinks. The heat sink choice is determined by the
application environment (temperature, air flow, adjacent component power dissipation) and the physical
space available. Because there is not a standard application environment, a standard heat sink is not
required.
Accurate thermal design requires thermal modeling of the application environment using computational
fluid dynamics software which can model both the conduction cooling and the convection cooling of the
air moving through the application. Simplified thermal models of the packages can be assembled using the
junction-to-case and junction-to-board thermal resistances listed in the thermal resistance table. More
detailed thermal models can be made available on request.
Heat sink vendors include the following list:
72
θ
JC
MPC8323E PowerQUICC™ II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 1
is device related and cannot be influenced by the user. The user controls the thermal environment to
R
R
R
Aavid Thermalloy
80 Commercial St.
Concord, NH 03301
Internet: www.aavidthermalloy.com
Alpha Novatech
473 Sapena Ct. #12
Santa Clara, CA 95054
Internet: www.alphanovatech.com
International Electronic Research Corporation (IERC) 818-842-7277
413 North Moss St.
Burbank, CA 91502
Internet: www.ctscorp.com
Millennium Electronics (MEI)
Loroco Sites
671 East Brokaw Road
San Jose, CA 95112
Internet: www.mei-thermal.com
Tyco Electronics
Chip Coolers™
P.O. Box 3668
Harrisburg, PA 17105-3668
Internet: www.chipcoolers.com
θ
θ
θ
JA
JC
CA
= junction-to-ambient thermal resistance (°C/W)
= junction-to-case thermal resistance (°C/W)
= case-to-ambient thermal resistance (°C/W)
θ
CA
. For instance, the user can change the size of the heat
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