Thank you for this information. I have to say, it is a little intriguing that the IC isn't rated to handle the rectified voltage of the common 115AC line. I'm going to build a pcb layout of your circuit and see if i can indeed fit it into the small constraints of my enclosure.
I am curious about what to use for the VCC, which the datasheet says can go to 25V. I cant find out what the minimum input current is, though. I'm thinking of either a resistor divider or simple voltage regulator IC. Unfortunately, it's proving to be quite difficult finding the correct voltage regulator that will provide ample current for the IC, while also being small and compact and able to carry 170VDC from the rectified input.
Also, what's the wattage rating for R6?