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参考PMP2224 TPS5430 输出-12V,纹波太大问题



Dear:

      现用PMP2224的文档设计出来的-12V,输出是这样的

BOOT脚经过电容输出是这样的

电感试过线艺的,电容基本上是村田的。怎么达不到很好的电压。平时比较少调这些,请各位帮忙看下。谢谢