Sigrity: Tip of the day – Temperature-dependent resistor model in PowerDC

Incorporating temperature-dependent resistor models in simulation is very important because, over a broad range of temperatures, the resistance of these models will be proportional to the temperature. If you run a known current through these models and measure the potential drop across them, you will know the resistance and hence, the temperature. In simulation tools, it is important to consider the temperature dependency of the component to get a reasonably accurate result. 

Sigrity PowerDC supports temperature-dependent resistor models. The resistance of the component varies as a function of the temperature. To set values, go to Analysis Setup > Electrical > Set up Discretes and create the discrete component by using the wizard. A new column, Temp-Resistance Table, will be added in the Voltage Drop Analysis Setup -> Set up Discretes form. You can enter values in this column. 

Example: 

You can also upload a .txt file here containing temperature-resistance pairs. If a file is uploaded here, it will replace the default resistance value. This feature is supported only for single-board workflows. 

Example: 

How are you incorporating temperature-dependent resistor models in your simulation? 

Share your thoughts about this feature. 

Team SimTech  

Cadence Design Systems