LM5116-12EVAL: Transient simulation of LM5116 in PSpice stops running

Ryan Rah

Part Number: LM5116-12EVAL
Other Parts Discussed in Thread: LM5116

Tool/software:

I did some changes to the value of parameters based on my application operating points based on quick start excel file, but simulation stops at 0.4ms!
I attached both excel file and .OPJ for further analysis.
0486.LM5116_TRANS_Customized.zip

5 months ago

0 EricLee 5 months ago

TI__Guru 58851 points

Hello Ryan

I will looks into this after finishing SIMETRIX issue.

-EL

0 EricLee 5 months ago in reply to EricLee

TI__Guru 58851 points

Hello Ryan

Please send me all simulation files not only OPJ file. I cannot run your simulation file.

-EL

0 EricLee 5 months ago in reply to EricLee

TI__Guru 58851 points

Hello Ryan

Transient model Rev C (https://www.ti.com/lit/zip/snvm345 ) runs well up to 3ms. Would you please start from this example and change the component values one by one ?

-EL

0 Ryan Rah 5 months ago in reply to EricLee

Prodigy 180 points

Thanks Eric,

I did just small changes in component value to tune based my in put/output voltages!
Here is the full project folder for your reference!
LM5116_PSPICE_TRANS - Support.zip

0 EricLee 5 months ago in reply to Ryan Rah

TI__Guru 58851 points

Hello Ryan

.DSN file causes an error. If possible, please convert to the Version 17.4 or lower.

-EL

0 Ryan Rah 5 months ago in reply to EricLee

Prodigy 180 points

I just downloaded the available version from TI website.

Maybe this way is easier:
I am attaching the quick start excel file which has my operating points, if you can tune your available model based on these values and make it run and share the finale simulation folder with me, I can run from my side
.MPPT_LM5116_quickstart.xls

0 EricLee 5 months ago in reply to Ryan Rah

TI__Guru 58851 points

Hello Ryan

Please try the attached. I think MOSFET model has a problem or the device model doesn't match with MOSFET models. I also enabled the Auto Convergence option. Please go to PSPICE>EDIT SIMULATION PROFILE>OPTION>ANALOG SIMULATION>AUTO CONVERGENCE.

By the way, 1.3kW is too much for the single phase LM5116 can handle, please consider using >=4-phase design.

snvm345c_modified.zip

-EL

0 Ryan Rah 5 months ago in reply to EricLee

Prodigy 180 points

I am trying to modify the schematic design and interleave another LM5116 with the same component values just for sanity check, but getting netlist error!
I renamed the duplicated components and signals for the second circuit!
How can I edit/modify the PSpice schematics and make it to run?

0 EricLee 5 months ago in reply to Ryan Rah

TI__Guru 58851 points

Hello Ryan

Please diligently check every node name. Copying and pasting generates lots of duplicated node names which cause an error. I am not sure it is possible to simulate two DC/DCs in parallel in PSPICE. SIMPLIS is fast so that you can simulate two phases without any problem, but PSPICE is slow.

-EL

0 Ryan Rah 5 months ago in reply to EricLee

Prodigy 180 points

Understood!

Is there any SIMPLIS simulation file for LM5116 that represents transient and also average model of it to be shared!

+1 EricLee 5 months ago in reply to Ryan Rah

TI__Guru 58851 points

Hello Ryan

The SIMPLIS file is in your other post https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1495133/lm5116-average-transient-simulation-of-lm5116-in-simplis

You don't need the average model. SIMPLIS can do both transient and AC simulations using the transient model.

-EL

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LM5116-12EVAL: Transient simulation of LM5116 in PSpice stops running