I wonder if anyone has any ideas. I am using a TOP269-JX. It's application is a power amplifier. The board itself is capable of kicking out 90W easily, but when running at 25W and peaking to 40W it appears to shut-down and go into a restart mode.
Modifications I have made to the attached schematic have been to short R653 (I Limit at 100%) to no availe.
I have ensured that the control pin and bias windings and capacitors C630, C614 & C625 are tracked back to the bulk storage capacitor.
I have added 100nF across the pins Control to Source.
All to no availe.
I am starting to think that it is not the device running out of grunt during transienst as I fitted the meatier TOP271 with no sucess.
I am thinking it may be the feedback path that is to blame, but I would welcome any other suggestions from the experienced forum members.