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TMS320F280025: TMS320F280025驱动PFC

Part Number: TMS320F280025

你好:目前碰到一个问题,TMS320F280025做数字电源PFC驱动,目前调试输出一切正常,但是无法应对AC输入电压突变问题。当AC电压85V工作一切正常,突然AC电压增加到220V,工作不正常,想请教下,有没有什么办法应对交流电压突然变化的方法?