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| 型号： | MPC8315ECVRADDA |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 103/106页 |
| 文件大小： | 0K |
| 描述： | MPU POWERQUICC II PRO 620-PBGA |
| 标准包装： | 36 |
| 系列： | MPC83xx |
| 处理器类型： | 32-位 MPC83xx PowerQUICC II Pro |
| 速度： | 266MHz |
| 电压： | 1V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 620-BBGA 裸露焊盘 |
| 供应商设备封装： | 620-PBGA（29x29） |
| 包装： | 托盘 |
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MPC8315E PowerQUICC II Pro Processor Hardware Specifications, Rev. 2
96
Freescale Semiconductor
Thermal
25.2
Thermal Management Information
For the following sections, PD = (VDD IDD) + PI/O where PI/O is the power dissipation of the I/O drivers.
25.2.1
Estimation of Junction Temperature with Junction-to-Ambient
Thermal Resistance
An estimation of the chip junction temperature, TJ, can be obtained from the equation:
TJ = TA + (RJA PD)
where:
TJ = junction temperature (C)
TA = ambient temperature for the package (C)
RJA = junction to ambient thermal resistance (C/W)
PD = power dissipation in the package (W)
The junction to ambient thermal resistance is an industry standard value that provides a quick and easy
estimation of thermal performance. As a general statement, the value obtained on a single layer board is
appropriate for a tightly packed printed circuit board. The value obtained on the board with the internal
planes is usually appropriate if the board has low power dissipation and the components are well separated.
Test cases have demonstrated that errors of a factor of two (in the quantity TJ - TA) are possible.
25.2.2
Estimation of Junction Temperature with Junction-to-Board
Thermal Resistance
The thermal performance of a device cannot be adequately predicted from the junction to ambient thermal
resistance. The thermal performance of any component is strongly dependent on the power dissipation of
surrounding components. In addition, the ambient temperature varies widely within the application. For
many natural convection and especially closed box applications, the board temperature at the perimeter
(edge) of the package is approximately the same as the local air temperature near the device. Specifying
the local ambient conditions explicitly as the board temperature provides a more precise description of the
local ambient conditions that determine the temperature of the device.
At a known board temperature, the junction temperature is estimated using the following equation:
TJ = TB + (RJB PD)
where:
TJ = junction temperature (C)
TB = board temperature at the package perimeter (C)
RJB = junction to board thermal resistance (C/W) per JESD51-8
PD = power dissipation in the package (W)
When the heat loss from the package case to the air can be ignored, acceptable predictions of junction
temperature can be made. The application board should be similar to the thermal test condition: the
component is soldered to a board with internal planes.
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| MPC8315ECVRAFDA | 功能描述:微处理器 - MPU ENCRYPT 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 |
| MPC8315ECVRAGDA | 功能描述:微处理器 - MPU ENCRYPT 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 |
| MPC8315E-RDB | 功能描述:处理器 - 专门应用 PROCESSOR BD RoHS:否 制造商:Freescale Semiconductor 类型:Multimedia Applications 核心:ARM Cortex A9 处理器系列:i.MX6 数据总线宽度:32 bit 最大时钟频率:1 GHz 指令/数据缓存: 数据 RAM 大小:128 KB 数据 ROM 大小: 工作电源电压: 最大工作温度:+ 95 C 安装风格:SMD/SMT 封装 / 箱体:MAPBGA-432 |
| MPC8315E-RDBA | 功能描述:开发板和工具包 - 其他处理器 PROCESSOR BD RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
| MPC8315E-RDBA | 制造商:Freescale Semiconductor 功能描述:MPC8315E-RDB Reference Platform |
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