[SOLVED] Analog PFC Controller with MCU

[fethiyeli]

Hi,

I would like to think using analog PFC controller as alternative but due to some reason, I may change the output voltage to somewhat lower or higher voltages. So, I would like to modify the output PFC voltage by MCU. I know, PFC output voltage is set by the voltage divider at the output.

Is that possible or safe controlling the PFC output voltage by MCU ?

 

[KlausST]

Hi,

what do you mean by "safe"?

My idea:
Don´t make the complete control loop by the MCU, but just "modify" the feedback of a standard PFC to get the desired output.
Similar to this. https://www.edaboard.com/threads/design-of-pwm-controlled-smps-output-voltage.377215/post-1616040

Klaus

 

[fethiyeli]

I just would like to change the PFC output voltage by changing the voltage of the voltage divider by MCU without modifying the voltage loop.

By doing that am I modifying the voltage loop ? That's why, I asked whether it is safe or not.

Yes, I was talking about the schematic you have shared.