參數(shù)資料
型號(hào): MPC8533EVTANG
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 800 MHz, MICROPROCESSOR, PBGA783
封裝: 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, FC-PBGA-783
文件頁數(shù): 4/116頁
文件大?。?/td> 1273K
代理商: MPC8533EVTANG
MPC8533E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 3
Freescale Semiconductor
101
Thermal
Figure 60. Approach Air Velocity (m/s)
20.3.4
Temperature Diode
The MPC8533E has a temperature diode on the microprocessor that can be used in conjunction with other
system temperature monitoring devices (such as Analog Devices, ADT7461). These devices use the
negative temperature coefficient of a diode operated at a constant current to determine the temperature of
the microprocessor and its environment. It is recommended that each device be individually calibrated.
The following are voltage forward biased range of the on-board temperature diode:
Vf > 0.40 V
Vf < 0.90 V
An approximate value of the ideality may be obtained by calibrating the device near the expected operating
temperature. The ideality factor is defined as the deviation from the ideal diode equation:
Another useful equation is:
where:
Ifw = Forward current
1
3
5
7
8
0
0.511.5
22.5
33.5
Thermalloy #2328B Pin-fin Heat Sink
Heat
Si
nk
Ther
m
a
lRes
is
tan
ce
C/
W
)
(25
× 28 × 15 mm)
2
4
6
Ifw = Is e
qVf
nKT – 1
IH
IL
VH – VL = n
ln
KT
q
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