PMP22343: PMP22343

Hi Sanjay,

I am not able to open / view this file, can you post a screenshot of the schematic?

Can you describe the issues you are having with the simulation results?

PMP22343 is based on an inverting buck-boost with an added aux winding to create a positive output voltage. I would suggest getting the buck-boost section working on your simulation first, then adding the aux winding.

Thanks,

John

Hi John,

Could u share Pspice model of PMP22343 to simulate and check the response 

Pspice12.zip

For ref

Hi Sanjay,

I am having trouble opening this file, I can help debug this issue without running this however.

Can you provide more information on the issue you are having? Does it occur during start-up? Is it during steady-state operation? What is the loading for the two outputs?

Please add screenshots of the issue you are seeing and schematic so I can have a better idea of what is happening.

Thanks,

John

The screenshots of the project and output is added below

The Output Voltage V(-40V) is always at zero when Vin is 5V 

The schematic which is based on subject used is attached for ref 

5Vto40V.pdf

Kindly support on how to simulate the same exact results

Hi Sanjay,

It seems like the switching frequency is off in your simulation, at least off by a decade. Can you try running this open loop?

Your schematic looks fine, I will look into the transient model for TPS54560 to see why the frequency seems off.

Thanks,

John