输入为28V,输出为16V/3A,带载时出现占空比不稳定的现象。工作偏绿为560K,图中的频率为560K,270看,180K等
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Hi
TPS54340是有PowerPad的, 对于正电压输出,PowerPad是接GND的。对于负电压输出芯片的GND是作为负电压输出的, PowerPad是接的也是负电压。
在Layout中,不要将2个PowerPad 连接到一起了。
Hi
输入也要注意,正电压的输入GND就是GND。负电压输出的输入Gnd,电容要接到负电压。