Hello all,
we tested the 600W AVR Power Supply evaboard slou293.
It works well with constant Loads. But with dynamic Audio Loads or Loads with low Frequency below 100Hz causes a instable PFC.
This results sometimes in overshoot or short power down of the 400V rail PFC Voltage.
Changes of the UCC28061 compensation network (R80, C59, C58) does'nt solve this behaviour.
Are there any known issues?
best regards,
Raimund