Tool/software:
Dear TI ,
I already disable burst mode by setting LL pin, but the LLC PWM looks like HF burst mode when loading increase from 0.8A to 1.2A. (below pic.) I hear some audio noise so I don't continue to add load.
From the waveform , output voltage 70V(CH2) is stable ,but PWM frequency(CH3) is change with fixed HF. I see the fixed HF is the same as FB_opto(CH1). Please help to check if it is HF burst mode or feedback loop oscillation. How do I fix the problem ?
CH1: FB_opto CH2: +70Vo CH3: LLC low side PWM
