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Suded, Another thing that I was thinking (but forgot to state here) was this: Since the problem seems to be that your QSPICE simulation was not picking up all the subcircuit definitions in TI's model,

Hi Andy, Tony I managed to run the schematic for synchronous buck boost converter (the same uploaded schematic) in Qspice after I updated it Many thanks for your help Best regards, Suded

Thank you Tony. Regards Udo

On 20/04/2025 09:19, Udo Huhn-Rohrbacher via groups.io wrote: > Hi All, > I had a discussion with LTspiceVXII and LTspice24 users about the accuracy > of measurement results, shown up in the spice

Hi Andy, The example I got from Qspice forum for UCC27282 worked, I had to update Qspice to the latest version, there are few warnings but they are ignored and simulation is running and waveform

Hi Tony, ok, many thanks Suded

Don't try to upload a file of the same name as another that already exists in /Temp. That's problematic in any file system. If it's an update to an existing file, click on the "Update" icon

Hi All, I had a discussion with LTspiceVXII and LTspice24 users about the accuracy of measurement results, shown up in the spice error log. To verify how the constant “pi” is handled, we made a

In LTspice, when the waveform window does not show up, it usually means that LTspice is still working, trying to find the initial operating point.? Sometimes it can get stuck there. Andy

Hi Andy, Many thanks for that, Im trying to get something on the Qspice forum as we speak, they said there are errors that could be ignored, but in my case the waveform window is not showing up, they

I can't see much reason for the simulation going bad in QSPICE. But I am not currently running QSPICE, and I do not know the steps it uses to import a model - or, more precisely, to create a schematic

Hi Andy, Just uploaded the .ZIP file: Buck Boost 1 converter to Temp, it has ucc27282.lib Regards, Suded

Sorry, I had a typo. The model file you uploaded: "UCC27282 model.txt". The model file needed: "ucc27282.lib". Both the main part of the filename and the extension do not match. Andy

Suded, Thank you for the new upload.? It has all the pieces, for LTspice at least. It does have 2 problems, though, both of which are fixable on our end: * The auto-generated symbol points to a

Hi Andy, Yes, I can see it, "Buck Boost Converter.Zip in Temp deleted the rest! Regards, Suded

Hi Andy, Yes, I replaced it with IRFR7446 in Qspice, since BSZ076N06NS3 is built in LTspice only, IRFR7446 should do the same job By the way Temp was preventing me from uploading the same file name it

There is no IRFR7446 on your schematic.? I think you did not need to "upload" (? - did you mean "include"?) that model file. Did you mean the BSZ076N06NS3 MOSFET? Let me back up here. Are we even

Reason for button click "include all files", I was looking into Qspice forum, in one thread Mike suggested that this button should be ticked, which I tried for another model for TLV1831 comparator,

That is true, because you did not upload it yet!? You won't see it online until you upload it. It appears you uploaded just the schematic file again ("Synchronous Buck Boost 1 Converter using

Hi Andy, Yes, I had to upload moadel (.SUBCKT) for IRFR7446 mosfet, I have for of them in H-bridge configuration, but they are working well I had to generate/edit symbols for them in Qspice, I even