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Junction Temperature |
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Junction Temperature |
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Junction Temperature
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Junction Temperature |
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Junction Temperature |
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Junction temperature is computed as follows:
TJ = TC + ΘJCP
where
TJ = worst case junction temperature (°C)
TC = case temperature (°C)
ΘJC = junction-to-case thermal resistance (°C/watt)
P = power dissipation
When computing delta junction case temperatures, RAM Commander provides three input parameters:
| • | Delta junction case temperature (dTJC) |
| • | Thermal resistance |
| • | Power dissipation |
If you enter a value for delta junction case temperature (dTJC), RAM Commander ignores the others when making computations.
If no value for (dTJC) exists, RAM Commander computes it using values for QJC and P using the logic shown in the table below.
Input parameters (fields) |
Formula for dTJC |
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Thermal resistance ΘJC |
Power dissipation (P) |
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User defined |
User defined |
ΘJC (User) * P(User) |
User defined |
— |
ΘJC (User) * P(Default) |
— |
User defined |
ΘJC (Default) * P(User) |
— |
— |
dTJC (Default) |
Set temperature parameters for an item in its reliability prediction method parameters data screen.