We have an old design which use TOP249 YN, is it possible to use a TOP269EG with the same transformer ? ( we have many of them in stock on want to use them if possible).
I tried to simulate the current design on PI expert online tool (24V output, 1A output with 4A peak : it's intended to drive motors and when they force current can go up to 3A during a very few time).
I had to change R9 to 10K ohm instead of 15K because the output reached 50V instead of 24V intended.
I linked the output regulation and schematic thanks for your help.
Im not sure that the new design with the TOP269 even regulate properly because output just drop nearly lineary..