TPS650864: TPS6508641 - About FBOUTx pin

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Guru 21045 points

Part Number: TPS650864

Hi Team,

I use NFE31PT222Z1E9B(NF) to reduce noise.

Then, I would like to know the proper connection location for FBOUT pin.

Currently, FBOUT2 is connected to point A but the output voltage is lower than the target voltage.

Therefore, I would like to change the connect from point A(before NF) to point B(After NF).

Could you please let us know if you have any concern(Output oscillation etc.)?

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Regards,

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over 3 years ago

+1 Tomi Koskela over 3 years ago

TI__Genius 11020 points

Hello Hide,

Filter will change the loop response of the device and there is a risk it will start oscillating if you take the response after the filter. You can try and measure phase/gain margin to make sure the stability is good with this approach.

Thanks.

Regards,

Tomi Koskela

0 Hide over 3 years ago in reply to Tomi Koskela

Guru 21045 points

Hi Tomi-san,

Thank you for your prompt reply and advice.

Regards,

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TPS650864: TPS6508641 - About FBOUTx pin