crutschow
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The divider voltage is the main's rectified average voltage, not the mains rectified voltage......
So the divider is VRef= Vmains_rectfd*(R3+5k)/((R3+5k)+(R7+R2)) I believe.
Yes.I think you meant that Vmains_rectfd = 0.5*((Vac*1.414) - 2*Vd)*2/pi.
It adds a small amount of positive feedback to the Ref node.Also, how does R_Hyst affect hysteresis? It affects it as a lonely component or with another component?
The amount of feedback is determined by the voltage divider between R_Hyst and the equivalent resistance at the Ref node.
I just noticed an error in the U3 pot connection.
Attached is the corrected schematic.