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TPS54329环路稳定性

Other Parts Discussed in Thread: TPS54329

Hi,用到TI的电源芯片TPS54329,原理图设计、环路测试结果如附件。

       在测试环路稳定性时,将C20分别焊上22pF和68pF。测得结果22pF相位裕量不足,68pF相位裕量较好。但是参考其Datasheet的Page 13描述C20的值为5~22pF。请问C20是否可以取68pF。环路部分是否有更详细的资料和公式。谢谢!

TPS54329设计及测试图.rar