TPS54331 Power to high

pattakana

Prodigy 60 points

Hello

I calculated a Design with SwitcherPro for

Vmin=15V

Vmax=26V

Vout=5V

Ioutmax=2,5A

Also I have a Design for 12V Output and one for 3,3V Output.

But my Output voltage is

5V instead of 3,3V

6,7V instead of 5V

16,7V instead of 12V

How can I reduce the voltage? I tried to change R2, but it doesn't work. Can I reduce the voltage, but keep the same Inductor?

5-12-3.3.PDF

over 14 years ago

0 Abhishek Gupta - WEBENCH Design Center over 14 years ago

TI__Intellectual 890 points

Philipp,

I could not reproduce this issue. For me, SwitcherPro designs with whatever Vout I specify. For R2, only label can be changed and not value.

To answer the second part of your question. Yes, you can change Vout by keeping the same inductor. Please use 'Edit Inputs' option to modify the inputs once design has been created. When you click on this option, 'Change Input' window will open and you will see "Allow SwitcherPro to Pick Components" option. If this option is checked, SwitcherPro will override existing design with new components. In can you want to keep inductor from previous design, you can leave this option unchecked.

Thanks,

--Abhi

0 Surinder Singh over 14 years ago in reply to Abhishek Gupta - WEBENCH Design Center

TI__Expert 3085 points

This part is also available on WEBENCH Power Design tools. You may also try using it there.

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TPS54331 Power to high