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请问一下UCC28220的问题。

Other Parts Discussed in Thread: UCC28220

各位好!

       我现在在用UCC28220这颗料做一款电源,原理图见附件截图。现在给UCC28220供电,IC无驱动输出,不知问题出在那。想请人帮忙分析下.

        多谢!

电路图截图.docx