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参数资料
| 型号： | MPC8349ECZUAJFB |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 74/87页 |
| 文件大小： | 0K |
| 描述： | IC MPU POWERQUICC II PRO 672TBGA |
| 标准包装： | 24 |
| 系列： | MPC83xx |
| 处理器类型： | 32-位 MPC83xx PowerQUICC II Pro |
| 速度： | 533MHz |
| 电压： | 1.2V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 672-LBGA |
| 供应商设备封装： | 672-TBGA（35x35） |
| 包装： | 托盘 |
| 配用： | MPC8349E-MITX-GP-ND - KIT REFERENCE PLATFORM MPC8349E MPC8349E-MITXE-ND - BOARD REFERENCE FOR MPC8349 MPC8349EA-MDS-PB-ND - KIT MODULAR DEV SYSTEM MPC8349E |
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MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 13
76
Freescale Semiconductor
Thermal
(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 = TA + (RθJA × PD)
where:
TJ = junction temperature (°C)
TA = ambient temperature for the package (°C)
RθJA = junction-to-ambient thermal resistance (°C/W)
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.
20.2.3
Experimental Determination of Junction Temperature
To determine the junction temperature of the device in the application after prototypes are available, use
the thermal characterization parameter (
Ψ
JT) to determine the junction temperature and a measure of the
temperature at the top center of the package case using the following equation:
TJ = TT + (ΨJT × PD)
where:
TJ = junction temperature (°C)
TT = thermocouple temperature on top of package (°C)
Ψ
JT = junction-to-ambient thermal resistance (°C/W)
PD = power dissipation in the package (W)
The thermal characterization parameter is measured per the JESD51-2 specification using a 40 gauge type
T thermocouple epoxied to the top center of the package case. The thermocouple should be positioned so
that the thermocouple junction rests on the package. A small amount of epoxy is placed over the
thermocouple junction and over about 1 mm of wire extending from the junction. The thermocouple wire
is placed flat against the package case to avoid measurement errors caused by cooling effects of the
thermocouple wire.
20.2.4
Heat Sinks and Junction-to-Case Thermal Resistance
Some application environments require a heat sink to provide the necessary thermal management of the
device. When a heat sink is used, the thermal resistance is expressed as the sum of a junction-to-case
thermal resistance and a case-to-ambient thermal resistance:
RθJA = RθJC + RθCA
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MPC8349ECZUALDB | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
| MPC8349ECZUALFB | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
| MPC8349E-MDS | 功能描述:开发板和工具包 - 其他处理器 KIT FOR MPC8349E BDS 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: |
| MPC8349E-MDS-PB | 功能描述:开发板和工具包 - 其他处理器 PROCESSR BD MPC8349E 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: |
| MPC8349E-MDS-PBE | 功能描述:开发板和工具包 - 其他处理器 MPC8349E FAMILY ADS 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: |
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