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关于TPS54160制作轨分离(正负)电源的GND隔离问题

Other Parts Discussed in Thread: TPS54160

用TPS54160做板载电源,想尽可能减小开关噪声对后续电路的影响,把DC——DC开关部分的GND(PGND)和GND分开,PGND和GND用0R电阻单点连接,请问这样设计可以吗,能不能减小开关的纹波?24V的GND用不用也改为PGND?谢谢