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UCC3818 做3.6KW PFC

Other Parts Discussed in Thread: UCC3818

您好,我用UCC3818做3.6KW的PFC。在调试过程中发现些问题,烦请给予解答。在我把负载加到1.4KW时,输入电压电流波形包络线很大(如图)。

还有就是驱动波形有尖刺,在开通时有很大的振荡(如图)。希望能给予解答。非常感谢!