TEA1753 PFC performance

[niclas_samuelss]

Hello,

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?

Best regards,

Niclas Samuelsson

[guoweisun]

Hi，

Can you show your test input voltage value and catch the waveform with VIN/IIN?

Can you show the related test PF value under different test condition?

You can also compare your test result with UM10444 page6 table1/2/3?

Or you can try to adjust the capacitor value of C1,C2  to improve PF value.