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UCC28061交错PFC怎么解决掉电问题?

Other Parts Discussed in Thread: UCC28061

在调试过的几款交错PFC中,ucc28061是效果最好的一款:运行稳定,PF,thd很好,但碰到一个问题:就是如果突然掉电,又上电(1S)左右,VCC处在保持状态而不是重启状态的话,会炸鸡;后来按照提示做了个软启,有些改善,但仍不能完全解决问题,在对输入电压反复开关中仍有炸鸡现象