UCC3803: TINA simulation issue for AC analysis

Jason Change

Intellectual 370 points

Part Number: UCC3803

Hi Team,

I would like to simulate UCC3803 with AC analysis, but it doesn't work as below picture.

May I know how to solve this issue?

Regards,

Jason

over 1 year ago

0 Hong Huang over 1 year ago

TI__Guru 52455 points

Hi,

Please provide your .tsc file so I can run it to check.

0 Jason Change over 1 year ago in reply to Hong Huang

Intellectual 370 points

Hi Hong,

Please see attached file.

Or you can find this file in TINA example file (SMPS).

UCC3803_STEADY.tsc

Regards,

Jason

0 Hong Huang over 1 year ago in reply to Jason Change

TI__Guru 52455 points

Hi,

Please confirm what you want to get from the simulation is Bode Plots, right?

0 Jason Change over 1 year ago in reply to Hong Huang

Intellectual 370 points

Yes.

+1 Hong Huang over 1 year ago in reply to Jason Change

TI__Guru 52455 points

Hi,

It looks now the simulation works. You need to adjust the setup.

On the top, you can see Analysis. Click that, and select Set Analysis Parameters (Ctrl+Alt+P), then change Shut Conductance from 0 to 10m. Then the circuit simulation became working from my try.

0 Jason Change over 1 year ago in reply to Hong Huang

Intellectual 370 points

Hi,

Thanks for your support. It's work well.

Why the shut conductance need set to 10m?

Regards,

Jason

Power management

Power management forum

UCC3803: TINA simulation issue for AC analysis