UCC2805: PSICE model uccx813-5 model in altium not working

Klemen Dobravec

Part Number: UCC2805

Hi,

I have to simulate UCC2805 in Altium Designer. I begine with unencripted model that I found at TI web page.

Due to syntax issues I modified an simmulation do not retur any error anymore, component is not working.

Below I am sending circuit and spice model.

Regards, Klemen

0 Teng Feng over 4 years ago

Hi Klemen,

I am not familiar with Altium simulation since it is beyond our support.

From your schematic, I suggest that decrease VCC voltage to 10V and add a 1uF capacitor at REF pin.

May I know the power spec?

And could you provide the waveform of FB, COMP, CS, OUT, REF pin?

Regards,

Teng

0 Klemen Dobravec over 4 years ago in reply to Teng Feng

Teng, thank you for your answer.

I am preaty sure that reason is in pspice model, since reference model in TIna Ti softwer is operating correctly.

But I need to simmulate circuit in Altium since is company internal approved developement tool.

Regards, Klemen

0 Teng Feng over 4 years ago in reply to Klemen Dobravec

Hi Klemen,

I don't have Pspice simulation of UCC2805 schematic.

If you can provide waveform to me, I can analyze the issue.

Regards,

Teng

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