Sinewave.

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Presentation transcript:

Sinewave

Simulation result 263.4V

Square wave With this source of power, the pfc circuit needs to rectify the square wave and add a small filter to remove the high dV/dt from the high voltage signal. This will give an almost DC signal as input to the pfc. With this small filter and rectifier the UCC28180 will work as required. If you don't have a filter on the input, the boost MOSFET may see large inductive voltage spikes which will damage the device. It may be enough to just add a small capacitor after the bridge rectifier. This Cap? This Cap?

Simulation result 263.4V

Vds Sinewave Square wave 317V 340V

Square wave With this source of power, the pfc circuit needs to rectify the square wave and add a small filter to remove the high dV/dt from the high voltage signal. This will give an almost DC signal as input to the pfc. With this small filter and rectifier the UCC28180 will work as required. If you don't have a filter on the input, the boost MOSFET may see large inductive voltage spikes which will damage the device. It may be enough to just add a small capacitor after the bridge rectifier. This Cap? This Cap?

Vds No change even if adding cap Add cap Sweep from 0 to 100nF