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UCC2987做的有源钳位正激电路,在单独测试芯片的时候正常工作；但一旦主功率回路接通工作之后，测试用的UCC2897的接VDD辅助电源和接在FB端的辅助电源电压具有泵升，不知道这个泵升电压是怎样产生的
我这边认为应该主反馈回路功耗有关，因为主回路功率上去，导致于占空比与交叉调节有关系。
