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LTspice model body diode characteristics differ significantly from datasheet

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KiliB
KiliB Contributor Level 1
in Module Products

Hi,

I noticed that the Vds-Ids characteristics in LTspice of the CAB760M12HM3 module differs quite a bit from the datasheet values. The first plot shows the module characteristics using the LTspice model. The break in the body diode curve is not in the model, I just did not collect datapoints below 200A. The second plot uses data from the plecs XML file (which is way closer to the datasheet). Especially the fact that the diode temperature curves are swapped (150°C is above the 25°C) is not possible in reality.

Wolfspeed_Vds-Ids_LTspice_FAIL.png
Wolfspeed_Vds-Ids.png

Not only the body diode behaves very strange in LTspice, also the Rdson seems a little different. Did anyone else observe this behavior?

Thanks

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  • Forum_Moderator
    Forum_Moderator Wolfspeed Employee - Contributor Level 5
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