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TPS737环路测试时,相位裕度小于30°,怎样提升相位裕度?希望给点建议感谢!



   TPS73701原理图如下。在测试相位及复制裕度时有拿掉C241。当输出负载未0A 及0.25A时,相位裕度小于30°,负载为0.5A时,相位裕度可以大于30°;怎样可以提升轻载时的相位裕度,使大于30°。

下图是0A负载时的波特图:

下图是0.25A负载时的波特图: