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| 型号： | MPC7410HX450LE |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 39/56页 |
| 文件大小： | 0K |
| 描述： | IC MPU 32BIT 450MHZ 360-CBGA |
| 标准包装： | 44 |
| 系列： | MPC74xx |
| 处理器类型： | 32-位 MPC74xx PowerPC |
| 速度： | 450MHz |
| 电压： | 1.8V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 360-BBGA，FCCBGA |
| 供应商设备封装： | 360-FCCBGA（25x25） |
| 包装： | 托盘 |
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MPC7410 RISC Microprocessor Hardware Specifications, Rev. 6.1
44
Freescale Semiconductor
System Design Information
8.8.1 Internal Package Conduction Resistance
For the exposed-die packaging technology, shown in Table 3, the intrinsic conduction thermal resistance paths are
as follows:
The die junction-to-case (or top-of-die for exposed silicon) thermal resistance
The die junction-to-ball thermal resistance
Figure 28 depicts the primary heat transfer path for a package with an attached heat sink mounted to a printed-circuit
board.
Heat generated on the active side of the chip is conducted through the silicon, then through the heat sink attach
material (or thermal interface material), and finally to the heat sink where it is removed by forced-air convection.
Since the silicon thermal resistance is quite small, for a first-order analysis, the temperature drop in the silicon may
be neglected. Thus, the heat sink attach material and the heat sink conduction/convective thermal resistances are the
dominant terms.
Figure 28. C4 Package with Heat Sink Mounted to a Printed-Circuit Board
8.8.2 Adhesives and Thermal Interface Materials
A thermal interface material is recommended at the package lid-to-heat sink interface to minimize the thermal
contact resistance. For those applications where the heat sink is attached by spring clip mechanism, Figure 29 shows
the thermal performance of three thin-sheet thermal-interface materials (silicone, graphite/oil, floroether oil), a bare
joint, and a joint with thermal grease as a function of contact pressure. As shown, the performance of these thermal
interface materials improves with increasing contact pressure. The use of thermal grease significantly reduces the
interface thermal resistance. That is, the bare joint results in a thermal resistance approximately seven times greater
than the thermal grease joint.
Heat sinks are attached to the package by means of a spring clip to holes in the printed-circuit board (see Figure 26).
This spring force should not exceed 5.5 pounds of force. Therefore, the synthetic grease offers the best thermal
performance, considering the low interface pressure. Of course, the selection of any thermal interface material
depends on many factors—thermal performance requirements, manufacturability, service temperature, dielectric
properties, cost, and so on.
External Resistance
Internal Resistance
Note the internal versus external package resistance.
Radiation
Convection
Radiation
Convection
Heat Sink
Printed-Circuit Board
Thermal Interface Material
Package/Leads
Die Junction
Die/Package
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MPC7410HX450NE | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:MPC7410 RISC Microprocessor Hardware Specifications Addendum |
| MPC7410HX500LE | 功能描述:微处理器 - MPU NT HITCE RV1.4 1.8V 105C RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
| MPC7410HX500LE | 制造商:Freescale Semiconductor 功能描述:IC 32-BIT MPU 500MHZ 360-FCCBGA |
| MPC7410RX400LE | 功能描述:微处理器 - MPU REV 1.4 1.8+/-.05V 105C RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
| MPC7410RX400NE | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:MPC7410 RISC Microprocessor Hardware Specifications Addendum |
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