error:Thermal state derivatives are infinite or NaN.

tongbu-boost.plecs (423.6 KB)

This model has several underlying electrical and control issues that must be resolved before introducing thermal analysis.

The LMG342xR030 devices have a max ID of 50A yet the current in your simulation exceeds 2000A. This causes the temperature of the device to quickly approach infinity, which in turn generates the error message you are observing.