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Associate II
November 2, 2025
Solved

Encrypted Spice model for altair04-900

  • November 2, 2025
  • 1 reply
  • 345 views

Hello!
I am currently designing a flyback converter with the altair04-900.
The .lib file in the spice model folder is encrypted. I cannot open it neither with Altium nor with ltSpice.

I would like to know, which simulation software can decrypt it? And, more specifically, if there is any free simulation software?

Best answer by Felix_Mari
PSpice might be yes. Maybe someone knows about a free alternative

1 reply

AScha.3
Super User
November 2, 2025

Hi,

you cannot "open" an encrypted model, just use it.

read:

https://groups.io/g/LTspice/topic/importing_lib_and_olb_files/50193572

 

Is it working in LtSpice ?

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Associate II
November 2, 2025
Hi. Maybe I did not explain myself well: I cannot use/simulate it.
ltSpice builds a valid symbol and reads the non encrypted .SUBCKT lines
but cant read the rest. From what I've read, ltSpice cannot read
encrypted .lib files unless specifically encrypted for ltSpice.
AScha.3
Super User
November 2, 2025

Aha...ok, so you could ask STM to add a encrypted model for LTspice .

ask here ->

https://ols.st.com/s/

 

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