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最近测试DRV2700 给压电陶瓷驱动，输入和输入都为V+Vsin(wt）形式的信号。采用5V供电，但是一将使能端接上5v，芯片的boost升压正常，输出70V，但是放大28.8倍的功能不正常，只有大概3-4V的杂乱信号输出。图见附件
亲；貌似电路被干扰了。建议传个相关PCB图看看。
原理图
原理图如下：
pcb如下
