TPS55288: TPS55288 for USBC Buck-Boost Convertor @8A

George Huang

Intellectual 260 points

Part Number: TPS55288
Other Parts Discussed in Thread: LM251772, LM5175

Tool/software:

Hi,

Can I use TPS55288 as an USBC Buck-Boost Convertor: Input range 5V-20V, output 12V, maximum current 8A?

If not, can you please recommend one for this application?

Thank you.

2 months ago

0 Brigitte 2 months ago

TI__Guru 67515 points

Hello George,

This is dependent on the cooling you have available. In general I would recommend having a look to LM251772 for this power range. This has all 4 switches externally which makes it easier to spread heat.

Best regards,
Brigitte

0 George Huang 2 months ago in reply to Brigitte

Intellectual 260 points

Hi Brigitte,

Appreciate the fast feedback.

I tried the WEBENCH with the LM251772, with " Input range 5V-20V, output 12V, maximum current 8A

, nominal 6.7A, max ripple 2%", and got the following failure message:

Design cannot be created!

Your preferred device does not work with the inputs you selected.

This device/topology does not support required Output Power. OpVal table param temperature > 150°C

Can you please advise a solution for this?

Thanks,

George

0 George Huang 2 months ago in reply to George Huang

Intellectual 260 points

Is there any concern if I use LM5175 for this application? or better solution definitly appreciated.

Best Regards,

George

0 Brigitte 2 months ago in reply to George Huang

TI__Guru 67515 points

Hello George,

There is something not as expected on Webench. We will check why this happened.

I recommend using the quickstart calculator: LM251772-QUICKSTART-CALC Calculation tool | TI.com

LM5175 is ok, but I would say LM251772 is the better solution.

Best regards,
Brigitte

Power management

Power management forum

TPS55288: TPS55288 for USBC Buck-Boost Convertor @8A

Design cannot be created!

Your preferred device does not work with the inputs you selected.