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PPC440GP-3RC400C 数据表(PDF) 57 Page - Applied Micro Circuits Corporation |
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PPC440GP-3RC400C 数据表(HTML) 57 Page - Applied Micro Circuits Corporation |
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57 / 83 page ![]() 440GP – Power PC 440GP Embedded Processor AMCC 57 Revision 1.07 – October 4, 2007 Data Sheet Heat Sink Mounting Information (Ceramic Package Only) Proper thermal design is primarily dependent upon multiple system-level effects; that is, the effects of the heat sink, the air flow, and the thermal interface material. To reduce the die-junction temperature, heat sinks may be attached to the package by several methods: adhesive, spring clips to the printed-circuit board or package, or a mounting clip and screw assembly. When attaching heat sinks, it is important to avoid placing excessive mechanical stress on bonding of the chip to the substrate and the package to the board. Heat Sink Attached With Spring Clip Heat Sink Attached With Adhesive Important: All of the guidelines indicated in the above diagrams must be evaluated and adjusted to account for the shock and vibration effects of any particular application. Heat sink Thermal grease Printed circuit board CBGA package Heat sink Heat sink clip Printed circuit board CBGA package Spring clip to board Spring clip to package Thermal grease Heat sink clip Heat sink clip Heat sink clip Static compression (spring force)—2.27kg maximum Static compression (spring force)—2.27kg maximum1 Note 1: Force is limited by allowable compression on the die. Allowable package compression force is 4.4kg. Heat sink Printed circuit board CBGA package Adhesive Heat sink Printed circuit board CBGA package Adhesive Heat sink weight force—60g maximum Weight force Weight force |
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