AnsweredAssumed Answered

ADP1047 300W EVM THD don't good

Question asked by huangcu on Aug 14, 2012
Latest reply on Aug 20, 2012 by huangcu

Dear Sir/Ms.

I test ADP1047 300W EVM but THD result is not very good at light load. I test It at 115Vac & 230Vac input and 10% 20% load. The THD result is around 22%~50%. this result is very poor. I try to turn off low power mode but I can not find turn on/off register bit. I reduce 0xFE32 to 20h and 00h. The THD value is still not changed. Do you have any suggest to improve THD.