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电源环路稳定性仿真 PSpice for TI

Other Parts Discussed in Thread: TPS62065

Hello,

     最近在对电源的环路稳态进行AC扫描分析时,按照pspice的方法来进行仿真发现得出来的波形不太正常,不确定下图的操作方法是否正确。使用的电源模型是TPS62065。

然后波形中的问题是环路增益一直为负DB,没办法找到穿越频率,另外想确定下这两个Y轴单位,和伯德图的单位似乎不一样,相角对应数值为0D,增益对应数值为-100。