TPS5430: EMC deign check

Lanxi Li

Expert 6825 points

Part Number: TPS5430

Tool/software:

Hello team,

Please help review the EMI/C design for TPS5430 and give us the recommend.

Standard is CE CISPPR 22 CLASS B.

Thank you.

schematic_TPS5430.pdf

Best regards,

Lanxi

6 months ago

0 Frank De Stasi 6 months ago

TI__Guru 72915 points

Hello

Check your input filter design against one of our filter tools or Webench.

Also, PCB layout will have a large influence on EMI results.

Thanks

0 Lanxi Li 6 months ago in reply to Frank De Stasi

TI__Expert 6825 points

Frank,

Can you help review the layout here?

Thank.

Lanxi

0 Frank De Stasi 6 months ago in reply to Lanxi Li

TI__Guru 72915 points

Hello

You should move C7 between FB1 and L2, so that it is in the path of the noise current.

Also, you should have a ground plane under the device and a generous amount of ground vias connecting the top ground plane and the inner ground plane layer.

Thanks

Power management

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TPS5430: EMC deign check