Hello, Thankyou for taking these waveforms. The gate driver noise on A and B tracks the turn-on of FETs C and D. This means the noise is occurring due to the QDd transitions. I think this noise is either on QDd or from the secondary rectifier inputs. Cout you take waveforms of FET QDg, QDd and the secondary switch nodes at the same time? I want to see which node is actually causing the ringing. Once we figure that out we will be able to mitigate it. Regards,
↧