TPS23754EVM-383: TP23754 EMC issue

Wendy Hsu

Prodigy 125 points

Part Number: TPS23754EVM-383

Hi,

We meet the issue that EMC RE fail on 36MHz~42MHz (Over 3dB)

Attachment is PD part schematic refer to TPS23754EVM-383.

PD part.pdf

We had tried the ways :increase the value of R59 ; add RC snubber on U25....but there is still no inprovement.

Could you help to provide the other way?

Can U8 filt the frequency?

Thanks

Wendy

over 1 year ago

0 Diang Xing over 1 year ago

TI__Genius 16141 points

Hi Wendy,

You could try to desolder common mode choke L5 and solder beads L6 and L26. You could also consider to solder C76.

The following link could be helpful:

https://www.ti.com/lit/an/slua469/slua469.pdf

Updated on Jan/17/2023: It has been a relatively long period that we have not received your reply. I will close this thread for now. Please open a new thread if you have further questions.

Best regards,

Diang

Power management

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TPS23754EVM-383: TP23754 EMC issue