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LM5035半桥电源伯德图测试波形异常

仿着开发板,做了一个半桥电源,想测试一下伯德图。

和开发板不同的是,我在sense+端又串了一个100欧电阻,用于调节2块并联时用的。

我将注入的小正弦波夹在VOUT和sense+端,测出的伯德图如下:

增益基本为1,相位基本为180度。

请问,是我多加了100欧的R5电阻导致的吗?是应该在R17两端注入小正弦波信号吗?