I am evaluating the TEA1753 for a LED driver application. I have been testing the evaluation module UM10444 and I have a question regarding the performance of the PFC. I attached a couple of images of the input current to the UM10444, one at 90W load and one at around 28W load. There is significant zero-crossing distorsion in both cases. Is there any way to improve the performance of the PFC? What exactly is causing the zero-crossing distorsion?