PMP10833: Simulation is not working in LTspice

Hi Peter,

Wile I was trying the simulation in TINA, getting "Operating point not found" ERROR. 

Can you please check the schematic?0312.Buck.TSC and let me know the issue.

Regards,

Ajmal

Hi Ajmal,

I suggest you try an increase the iterations for the operating point calculation in the simulation options settings.

I think the fact that the controller is floating on the high side with the mosfet may give rise to some issue with the simulator. I the past I have put 1000MR resistors in parallel with mosfets or inductors than may have been causing some issue with DC operating points.

Regards

Peter

Hi Ajmal,

I hope you have made some progress in the meantime on your simulation, since there has been no response to my last post for over a week I am going to close the post.

If you have more questions please open a new post.

Regards

Peter

Hi Peter,

Sorry for the delay in response. I was on vacation.

Still, my simulation is not working. Have you tried simulating my circuit at your end.? If that is working , please share the file or suggest the changes required.

Regards,

Ajmal T

Hi Ajmal,

I tried a couple of changes but the circuit will not converge for me either.

I suggest you replace the controller with a simple waveform generator and get the power stage debugged. I would then add in the controller and take it step by step.

Getting the simulation work can take as long as building it on the bench.

Regards

Peter

Hi Ajmal,

I hope you have made some progress, since there has been no reply to my post for a number of days now, I am going to close this post.

Please open a new post if you have more questions.

Regards

Peter