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26237C—May 2003 AMD Athlon™ XP Processor Model 10 Data Sheet
Preliminary Information
Appendix A - Thermal Diode Calculations 81
Preliminary Information
Appendix A
Thermal Diode Calculations
This section contains information about the calculations for the
on-die thermal diode of the AMD Athlon™ XP processor model
10. For electrical information about this thermal diode, see
Table 13, “Thermal Diode Electrical Characteristics,” on
page 37.
Ideal Diode Equation
The ideal diode equation uses the variables and constants
defined in Table 28.
Table 28. Constants and Variables for the Ideal Diode Equation
Equation Symbol Variable, Constant Description
n
f, lumped
Lumped ideality factor
k Boltzmann constant
q Electron charge constant
T Diode temperature (Kelvin)
V
BE
Voltage from base to emitter
I
C
Collector current
I
S
Saturation current