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  • 參數(shù)資料
    型號: MPC8347EZQADD
    廠商: FREESCALE SEMICONDUCTOR INC
    元件分類: 微控制器/微處理器
    英文描述: 32-BIT, 266 MHz, RISC PROCESSOR, PBGA620
    封裝: 29 X 29 MM, 2.46 MM HEIGHT, 1 MM PITCH, PLASTIC, BGA-620
    文件頁數(shù): 89/102頁
    文件大小: 1094K
    代理商: MPC8347EZQADD
    MPC8347E PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 11
    Freescale Semiconductor
    87
    Thermal
    where:
    RθJA = junction-to-ambient thermal resistance (°C/W)
    RθJC = junction-to-case thermal resistance (°C/W)
    RθCA = case-to-ambient thermal resistance (°C/W)
    RθJC is device-related and cannot be influenced by the user. The user controls the thermal environment to
    change the case-to-ambient thermal resistance, RθCA. For instance, the user can change the size of the heat
    sink, the air flow around the device, the interface material, the mounting arrangement on printed-circuit
    board, or change the thermal dissipation on the printed-circuit board surrounding the device.
    The thermal performance of devices with heat sinks has been simulated with a few commercially available
    heat sinks. The heat sink choice is determined by the application environment (temperature, air flow,
    adjacent component power dissipation) and the physical space available. Because there is not a standard
    application environment, a standard heat sink is not required.
    Table 63 and Table 64 show heat sink thermal resistance for TBGA and PBGA of the MPC8347E.
    f
    Table 63. Heat Sink and Thermal Resistance of MPC8347E (TBGA)
    Heat Sink Assuming Thermal Grease
    Air Flow
    35
    × 35 mm TBGA
    Thermal Resistance
    AAVID 30
    × 30 × 9.4 mm pin fin
    Natural convection
    10
    AAVID 30
    × 30 × 9.4 mm pin fin
    1 m/s
    6.5
    AAVID 30
    × 30 × 9.4 mm pin fin
    2 m/s
    5.6
    AAVID 31
    × 35 × 23 mm pin fin
    Natural convection
    8.4
    AAVID 31
    × 35 × 23 mm pin fin
    1 m/s
    4.7
    AAVID 31
    × 35 × 23 mm pin fin
    2 m/s
    4
    Wakefield, 53
    × 53 × 25 mm pin fin
    Natural convection
    5.7
    Wakefield, 53
    × 53 × 25 mm pin fin
    1 m/s
    3.5
    Wakefield, 53
    × 53 × 25 mm pin fin
    2 m/s
    2.7
    MEI, 75
    × 85 × 12 no adjacent board, extrusion
    Natural convection
    6.7
    MEI, 75
    × 85 × 12 no adjacent board, extrusion
    1 m/s
    4.1
    MEI, 75
    × 85 × 12 no adjacent board, extrusion
    2 m/s
    2.8
    MEI, 75
    × 85 × 12 mm, adjacent board, 40 mm side bypass
    1 m/s
    3.1
    Table 64. Heat Sink and Thermal Resistance of MPC8347E (PBGA)
    Heat Sink Assuming Thermal Grease
    Air Flow
    29
    × 29 mm PBGA
    Thermal Resistance
    AAVID 30
    × 30 × 9.4 mm pin fin
    Natural convection
    13.5
    AAVID 30
    × 30 × 9.4 mm pin fin
    1 m/s
    9.6
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