Hi,
Would anyone has face similar issue when that there is ringing when the mosfet turn on?
Below is some waveform captured for your reference of analysis.
Added resistor 56R at the Gate pin, however it will decrease the performance by requiring additional input of 0.5W.
Hope that there is help here..
The input voltage and current is referring to the output from the e-transformer.
Regards,
RVG