LM5176: LM5176: output ripple

Steven He92

Expert 2125 points

Part Number: LM5176

Dear Sir,

Please refer below picture, customer's output ripple different with EVM.

Please you kindly provide improve suggestion.

Electric spec: Vin=10V~36V, Vo=12V/10A

Thanks!

Steven

over 6 years ago

0 Youhao Xi over 6 years ago

TI__Guru* 78590 points

Hi Steven,

Thank you for posting. Obviously your output filter is not effective. It implies the layout problem. You need to modify your layout such that the switched current will be forced to pass through your output capacitors as you expect before it gets out to the load. Please refer to our EVM layout as the example.

By the way, the shown Vout ripples have nothing to do with COMP pin network.

Thanks,

Youhao Xi, Applications Engineering.

0 Steven He92 over 6 years ago in reply to Youhao Xi

Expert 2125 points

Dear Youhao,

Got it! thanks for your recommend.

Thanks!

Steven

0 Youhao Xi over 6 years ago in reply to Steven He92

TI__Guru* 78590 points

May I assume the issue has been resolved so I can close this thread here? You can always re-open it by adding a new post.

Thanks,

Youhao

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LM5176: LM5176: output ripple