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FALL引脚我将它悬空了，Shutdown signal, open drain; active low. Do not connect if not used，这是FULL引脚的解释，另外，我在通电前将RESET设置为低电平，通电之后再悬空; LC滤波我用的是一体成型电感之后，信号的功率并没有被放大。
