TPS5410: Compensation Design

Subash Kumar

Prodigy 70 points

Part Number: TPS5410

Tool/software:

I am working on TPS5410.

I just want to know if there is any calculator to calculate the compensation values

Regards

9 months ago

0 Andrew Kutzler 9 months ago

TI__Mastermind 18680 points

Hi Subash,

No need for compensation, the device has an internal type III compensation network inside.

You can add an additional 10pF feed forward capacitor between VOUT and FB.

Thanks,

Andrew

0 Subash Kumar 8 months ago in reply to Andrew Kutzler

Prodigy 70 points

Hi Andrew,

Thanks for the reply

I had tested the device with 10pF as you suggested

But there is no positive results, I am getting unstable voltage at output

I tried with MLCC and Aluminum Capacitor at output, Once i get right voltage then again it goes unstable

Is there any special low ESR capacitor requirement ?

Regards

0 Andrew Kutzler 8 months ago in reply to Subash Kumar

TI__Mastermind 18680 points

Hi Subash,

Can you show your schematic and layout please?

Thanks,
Andrew

0 Subash Kumar 8 months ago in reply to Andrew Kutzler

Prodigy 70 points

Hi,

I have attached the files

Regards

0 Andrew Kutzler 8 months ago in reply to Subash Kumar

TI__Mastermind 18680 points

Hi Subash,

Could you post a screenshot of the relevant portion of the layout please?

Thanks,
Andrew

0 Subash Kumar 8 months ago in reply to Andrew Kutzler

Prodigy 70 points

Hi,

Here is the Layout file

Regards

0 Andrew Kutzler 8 months ago in reply to Subash Kumar

TI__Mastermind 18680 points

Hmm,

It seems like the ground loop on some of you components is not ideal. You would really want D1's ground connection to be close to the bottom terminal of the input capacitor C2.

I'd also add a 100nF input capacitor close to the VIN pin.

You could also try a lower inductance value and see if that helps, but I mainly think that if the ground connections are improved you may get a better result.

Thanks,

Andrew

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TPS5410: Compensation Design