Hi all.
I have downloaded a .zip file from Infineon for their GaN device IGLD60R070D1, which has a .lib file in it. I am pretty close to importing it into LTSpice, but when I run my simulation I get the following warning:

"Unknown SPICE device type "?" in "?@@--start encryption: "SMX_AES ""

Belowis the part for the FET I want:

.SUBCKT IGLD60R070D1_L1 drain gate source source_k PARAMS: dgfs=0 Ls=0.3n Ld=0.8n Lg=3.0n
?@@--START ENCRYPTION: "SMX_AES "
?@@9ilQo+AE+GJLTdFaCx9eTdQISLYFSVqcW14xxLfM4BFBuYUYfvbF2CfqbSZwtSEv?##
?@@Wt4DoBXaEKmYVVYdv62wWZKUQj1YqM+ECgva8/9ipQJhUnX1EsqYqjBadt0NVKpL?##
?@@l17wKtN0JZ27KZ3vjHCbacDrd6y4HOUCRS37YMzoMS7kg0XDwVnEsVEQD8N21Nzw?##
?@@bmCOP1WpqW2P3OEQDEjFEqQ5GR9MSgW88l4NdUVqLTUc8T2OgpUuUpCYF1bMHnFD?##
?@@OC9WKZPhQdpaqxdbs3GpdC+/xvEpWpT11Ubbw7zBgDc/OAlPixLjbQxAgcm5LhWS?##
?@@DmZdLteDbD1Ev69E+XsuPRp/6+ICmo+5FBAz7u/4MAA+teBlaJUdXRJf9xnb8xdX?##
?@@Tm65qkI9HbVYvTFb7Z/pPT0uG16x8FjyCDX4fU3+KPhg4BU+G6h/qY5dvFacDpIE?##
?@@Ab+RzXkECZZzPVM80WJaloePZw5YJe9BFbAYaMPW0kAFdlM8ei8uuL9YAjpSLYG2?##
?@@PFQxoYawlIqC59H1aLX6dTOYjQlpAZFDLZZ+c3fSmorqeP7U/Zula46etfIio9Vw?##
?@@lEp6ZBl1Ev6Nqz3FrwaPIOtJASLnDDehutJ9jtF33p141O9qfEvK3Utj+lCcvVHk?##
?@@8jmuB+MzB/32ru0jTkK9cORb8xlcDCG9QBUWhyF0gNqWoituKuuNUfdvtXRSmB9C?##
?@@CHdan5uEMQIS9Cx1pXNN7LiT2vWVIhRYdSpDbFv9Pf+9IdnP4h0P9N6xrFcp6NMy?##
?@@LQ78v68RluBSFFnWfj0D2muI0d5krXz7oV11uMpE90siXBr7Th3SFt1qrUB2/R/e?##
?@@HWarJlaqTyKzqPVE+3eplDY1L+PcecGfmqqrj4o3CbTr3f+36wEgHuB9F4vjUZUU?##
?@@6ofN8BMxDWifa3i20VyWP9cH2Hygg2ZCSz12NxsnGBFij7TaDkhb7JjjZk9KUbg7?##
?@@oFP4cPzDLswvcGs7Kr+9B3wg/m1pqYJJePJsOOmMtkPpcBz25y/NvyCfYkuB1fTQ?##
?@@7nXjgF8Y1vqJqFbuLxgt8hhuocfQEn+021lo+KSZwnz9dPuW7Zk3JVgqDLkjsJ6b?##
?@@--END ENCRYPTION: "SMX_AES ", 19 lines, chksum 5266fd01
.ENDS

It's pretty obvious the error is because of the encryption that Infineon have on their .lib file. However, I have no clue how to get over this error message and simulate my buck converter.

Can anyone help? I haven't much experience with LTSpice.

 

There is no way to simulate encrypted models in ltspice. But someone really should finally decipher the encryption key

 

There is no way to simulate encrypted models in ltspice. But someone really should finally decipher the encryption key

Damn it! How exactly can I use their MOSFET models, then, if I cannot get past their encryption? Seems daft!

 

Usually the manufacturers like TI suggest you should use their favorite simulator like PSpice or Tina.
This one seems to be for pspice.

 

I'm surprised certain manufacturers don't encourage greater sales of their products by making unencrypted models available. Using encryption seems rather short-sighted.

 

I'm surprised certain manufacturers don't encourage greater sales of their products by making unencrypted models available. Using encryption seems rather short-sighted.

The problem I think is that they would have to do two models, one encrypted that copies exactly what the chip internally does, and another simplified model that can be left unencrypted because it doesn´t reveal any guarded intellectual property. Some even do this and provide simplified models for certain ICs.

Also I know that TI will provide unencrypted model for some customers that have an NDA contract signed.