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LM4871: Shutdown pin not functional

Part Number: LM4871

Hi Team,

In order to avoid pop noise at startup, I pulled Shutdown pin to high but found that output was still functioning, meaning that the Shutdown function was not active.

What's the actual function of the Shutdown pin?

If the amp can't be shutdown completely, what can we do to mitigate pop noise (other than having a differential input since that's not possible with this amp)?

Thanks!

Roy