USB hangs

USB communication hangs along with BLM when spike come. When I remove BLM from ground connection spike does not affect.

I have used BLM21P220 in series with ground and connector ground for noise isolation.

What was the reason on the spikes USB works without BLM and not works with BLM?

Thanks in advance.

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Is your device drawing operating power from the USB through the BLM?

Do you actually have the BLM21P220, or might you accidentally have installed a higher impedance part?

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My device doesn't take power from HOST. It is having it's own power. I will confirm the part, as the number I have asked for is correct.

Thank you for the reply.



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