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UCC28070从空载突带载到几千W时输入电压出现一个电压尖峰达到380V,UCC28070驱动关闭了一下后才稳定,电源有哒一声。

Other Parts Discussed in Thread: UCC28070

UCC28070空载到突带载几千W时,输入激起一个电压尖峰,电源哒一声才稳定,有电压尖峰UCC28070驱动关闭几mS后才恢复。黄色为整流桥前对PFC电压波形,蓝色为整流桥后对PFC电压波形,满功率为6.6KW,请问下TI的工程师们这输入电压波形怎么激起的?有哪些因素影响?