INN3670C frequency not stable -> noise
I am using a INN3760C for a 24VDC 100W power supply. I had a lot of emmissions over the air because the INN3670C was switching into the continuous conduction mode and back between 1-3A load. from 3A to 4A it was ok.
Then I placed 100Ohms and 2nF in parallel with the RFB Upper. Now this continous conducted mode switch is solved, but the switching frequency is not stable and this is produciong a lot of noise. Any idea to improve this schematic?
The plots are showing the primary voltage over D-S and the current and the secondary volate over the FET Q1.