TPS55340: Webench simulation for 12Vin, 38Vout, 1Aout use-case resulted output over 100V

Ernest Cho

Part Number: TPS55340

Tool/software:

Hi boost DCDC team,

One of my customer is using TPS55340 boost DCDC and want to adopt below condition to their new model and did WEBENCH simulation.

- 12Vin, 38Vout, 1Aout, (Boost DCDC)

But the WEBENCH simulation for "start up" and "stead state" resulted high Vout pulse like >100V.

They want to know if the simulation results they seen is just a "happening" due to simulator itself or if there's system impact since they are using almost maximum output rating?

Would you check and let me know this?

Best Regards,

Ernest Cho.

over 1 year ago

+1 Harry Hofner over 1 year ago

TI__Mastermind 19625 points

Hello Ernest,
Thanks for reaching out to us via e2e.

Webbench is a nice tool to find an appropriate product for your application.
But it has some drawbacks with respect to calculation and simulation.
So, I highly doubt that the problem that you see there reflects the reality.

To calculate the components of your power stage, compensation, etc. please use the
QuickStart calculator tool which you can download from here:
https://www.ti.com/tool/download/SLVC430

For a simulation I would recommend using PSpice for TI or maybe TINA.
You can find the models on our website:
https://www.ti.com/product/TPS55340?keyMatch=TPS55340&tisearch=search-everything&usecase=GPN-ALT#design-tools-simulation

PSpice for TI can also be downloaded from our website for free.

Best regards
Harry

0 Ernest Cho over 1 year ago in reply to Harry Hofner

TI__Expert 3191 points

Hi Harry,

Thank you for your reply.
Your mention relieve me. I will forward them for you mentioned.

Thank you.

Best regards,
Ernest

Power management

Power management forum

TPS55340: Webench simulation for 12Vin, 38Vout, 1Aout use-case resulted output over 100V