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TPA3223: TPA3223是否能用PFFB?

Part Number: TPA3223

HI TI TEAM,

 我想咨询一下,TPA3223能否接上PFFB? 在TPA3223EVM的第十九页,那部分被删除的元件是否为PFFB功能?

但是我按原理图去补焊元件,通电都发现功放自激。请问原因是?