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UCC28600误保护

Other Parts Discussed in Thread: UCC28600

最近在做的一个项目用UCC28600当反激的辅助电源,当主电路没工作时候,CS SS OVP的电平都还挺不错的,红色为输出,橙色为CS电压,绿色为驱动,蓝色为OVP电压

当主电路开始工作时候,就会出现

芯片进入保护状态,驱动不再输出,但是我看OVP,还有CS好像也都没有达到保护的阀值,不懂哪里误动作了,芯片进入了保护状态。谢谢。