Quick Answer
Calculate SiC MOSFET Steady-State Junction Temperature Estimator (Single-Pulse Thermal Resistance Network)
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SiC MOSFET Steady-State Junction Temperature Estimator (Single-Pulse Thermal Resistance Network) calculator computes Junction Temperature in K using the defined engineering formula and the input values provided. Junction Temperature is expressed in K. No universal acceptance threshold is defined by this calculator.
Worked Example
Verified calculation
Given:
- Ambient Temperature = 298.15
- Total Device Power Dissipation = 30
- Junction-to-Case Thermal Resistance = 0.35
- Case-to-Sink Thermal Resistance = 0.15
- Sink-to-Ambient Thermal Resistance = 0.8
Expected Result:
- Junction Temperature = 337.15
Engineering Interpretation:
Under the given input conditions, the calculated result is: Junction Temperature = 337.15 K.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.
Formula / Method
junction temperature = ambient temperature + total device power dissipation * (junction-to-case thermal resistance + case-to-sink thermal resistance + sink-to-ambient thermal resistance)Formula family: formula_powerelectronics_sic_mosfet_junction_temperature_estimator_steady_state_single_pulse
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| ambient_temperature | Ambient Temperature | INPUT | Ambient Temperature |
| power_dissipation | Total Device Power Dissipation | INPUT | Total Device Power Dissipation |
| theta_jc | Junction-to-Case Thermal Resistance | INPUT | Junction-to-Case Thermal Resistance |
| theta_cs | Case-to-Sink Thermal Resistance | INPUT | Case-to-Sink Thermal Resistance |
| theta_sa | Sink-to-Ambient Thermal Resistance | INPUT | Sink-to-Ambient Thermal Resistance |
| junction_temperature | Junction Temperature | OUTPUT | Junction Temperature |
Calculation Steps
- Enter the ambient temperature in K.
- Enter the total device power dissipation in W.
- Enter the junction-to-case thermal resistance in K/W.
- Enter the case-to-sink thermal resistance in K/W.
- Enter the sink-to-ambient thermal resistance in K/W.
- Step 1: Compute junction temperature.
- Read the junction temperature (K) from the results.
Engineering Summary
Calculate SiC MOSFET Steady-State Junction Temperature Estimator (Single-Pulse Thermal Resistance Network)
Frequently Asked Questions
What does this calculator calculate?
The SiC MOSFET Steady-State Junction Temperature Estimator (Single-Pulse Thermal Resistance Network) calculator estimates Junction Temperature based on the input parameters you provide
Why is ambient temperature important in this calculation?
ambient temperature is directly proportional to junction temperature. When you enter ambient temperature in K, the calculator uses it in the engineering formula to compute the output
How should I interpret the result junction temperature?
The calculator outputs junction temperature in K. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Ambient Temperature (K), Total Device Power Dissipation (W), Junction-to-Case Thermal Resistance (K/W), Case-to-Sink Thermal Resistance (K/W), Sink-to-Ambient Thermal Resistance (K/W). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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