I designed a flyback converter using top256 with reference from PI Expert for 24V, 2A output. When testing at 0.5A load, the power supply goes in auto-restart mode within a minute.
For testing I used a variac and tested on all voltages but behaviour is same. Earlier it would recover from the auto-restart but now the device just keeps restarting until I unload it.
All related calculations are verified in PI Expert but I don't understand what is causing the device to go under restart condition.
I've attached the schematic followed.
Please share your thoughts on what the problem may be.
Auto restart under normal conditions on top256