參數(shù)資料
型號: MPC8544VTARJ
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 533 MHz, MICROPROCESSOR, PBGA783
封裝: 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, FC-PBGA-783
文件頁數(shù): 108/112頁
文件大?。?/td> 1294K
代理商: MPC8544VTARJ
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 0
Freescale Semiconductor
95
Thermal
Tyco Electronics
800-522-6752
Chip Coolers
P.O. Box 3668
Harrisburg, PA 17105-3668
Internet: www.chipcoolers.com
Wakefield Engineering
603-635-2800
33 Bridge St.
Pelham, NH 03076
Internet: www.wakefield.com
Ultimately, the final selection of an appropriate heat sink depends on many factors, such as thermal
performance at a given air velocity, spatial volume, mass, attachment method, assembly, and cost. Several
heat sinks offered by Aavid Thermalloy, Advanced Thermal Solutions, Alpha Novatech, IERC, Chip
Coolers, Millennium Electronics, and Wakefield Engineering offer different heat sink-to-ambient thermal
resistances, that will allow the MPC8544E to function in various environments.
20.3.1
Internal Package Conduction Resistance
For the packaging technology, shown in Table 70, the intrinsic internal conduction thermal resistance paths
are as follows:
The die junction-to-case thermal resistance
The die junction-to-board thermal resistance
Figure 51 depicts the primary heat transfer path for a package with an attached heat sink mounted to a
printed-circuit board.
Figure 51. Package with Heat Sink Mounted to a Printed-Circuit Board
The heat sink removes most of the heat from the device. Heat generated on the active side of the chip is
conducted through the silicon and through the heat sink attach material (or thermal interface material), and
finally to the heat sink. The junction-to-case thermal resistance is low enough that the heat sink attach
material and heat sink thermal resistance are the dominant terms.
External Resistance
Internal Resistance
Radiation
Convection
Radiation
Convection
Heat Sink
Printed-Circuit Board
Thermal Interface Material
Package/Leads
Die Junction
Die/Package
(Note the internal versus external package resistance.)
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