How to properly connect Tj and Tc for LTspice simulation of C6D10170H

LeoLuchetti

Hello, with other SiC Part models the Tj and or Tc pins need to be connected to a voltage source in order for the device to behave properly. How should the Temperature pins be connected for the model of C6D10170H?

I currently have just Pin 2 (anode) and the case (Cathode) connected to the circuit.

Thanks,

Leo

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ZMiller

Hi Leo,

You can connect a voltage source directly to Tj if you want to fix the junction temperature during the simulation. If you connect the voltage source to Tc, you can fix the case temperature for the simulation and probe the Tj node (you'll need to extend a wire from the connection point) to see how the junction is changing with a fixed case temperature. If you add a resistor between Tc and this voltage source, you can model ambient temperature with the voltage source and have a variable case and junction temperature for the simulation.

I hope that helps.

Thanks,

Zack

LeoLuchetti

Can you have multiple devices Tj or Tc pins connected to the same voltage source or do they need to be connected to independent voltage sources?

What affect does it have on the simulation if you leave the Tj and Tc pins disconnected?

Thanks

ZMiller

Hi,

You can connect them to the same source, that isn't an issue. I'd recommend attaching the Tj pin for each device to the same voltage source when fixing the junction temperature. If you're attaching them all to the case, add a series resistor between the voltage source and the Tc pin to model Rch. You should attach at least one pin, otherwise the simulation may fail.

I hope this helps!

Thanks,

Zack

TBhatia

Hi, I hope that this answered your question. I will close this discussion for now but if you have a follow up question, please "Start a New Discussion" and we would be glad to support you further.