一般Buck-Boost IC输出极性与输入相反,需要另一个地做隔离吗?
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反压后,芯片原来的低变成了负电压,这一块需要独立出来做处理。反压后IC的输入电压相当于VIN+vout,所以要在VIN 和VOUT之间增加滤波电容。如果只是小电流小电压的反压,建议使用电荷泵,噪声会小一些,设计也会简单很多。