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MPC8572ECLPXAVND 数据表(PDF) 124 Page - Freescale Semiconductor, Inc

部件名 MPC8572ECLPXAVND
功能描述  MPC8572E PowerQUICC III Integrated Processor Hardware Specifications
PDF  140 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

MPC8572ECLPXAVND 数据表(HTML) 124 Page - Freescale Semiconductor, Inc

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MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4
124
Freescale Semiconductor
Thermal
Vf = Voltage forward biased
VH = Diode voltage while IH is flowing
VL = Diode voltage while IL is flowing
IH = Larger diode bias current
IL = Smaller diode bias current
q = Charge of electron (1.6 x 10 –19 C)
n = Ideality factor (normally 1.0)
K = Boltzman’s constant (1.38 x 10–23 Joules/K)
T = Temperature (Kelvins)
The ratio of IH to IL is usually selected to be 10:1. The above simplifies to the following:
Solving for T, the equation becomes:
VH – VL = 1.986 × 10
–4 × nT
nT =
VH – VL
__________
1.986
× 10–4



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