Hi there!
I've made a board very similar to the 120VAC EVM. It works fine, but the power factor is about 0.76, what looks quite low comparing to the datasheet. The main difference is that the LEDs forward voltage is about 22V@120mA (7x Cree Xlamp MX-6S). Originally the design was for 20Vf but I realized now that it has to be about 22Vf and the resistors (Rset) are slightly different. Any clue about what can it be? I've ordered new Rset resistors to try, but I wonder if it's not the problem.
Thanks in advance,
Miguel