first flyback PSU controller design

[claudiomas]

hello chevin amplifier psu its little aluminium box with 12 IRF740 and small transformer permannt running @100Khz
https://www.diyaudio.com/community/...-a-series-schematic.55780/page-2#post-7789674
i think to build two FSFR2100XS board , 400W max its OK , for home music,no need 1500Watts output
original psu no optocoupler so i want do same , in CV/CC
so my qustion its: to substitute tho optocoupler with two rsistors its insan idea???
thanks

 

[claudiomas]

order FRFS2100XS , for built simplest psu driver
i want get rid of chevin psu module, its a LLC half bridge 100Khz in a small box very old unreliable

 

[claudiomas]

FRFS2100XS not reliable, SG3525 +bridge pp TIP31/32 tuned @80Khz
and pulse transformer for LLC half bridge drive 6 pairs IRF740 should work
but how to choice right pulse transformer?
PE-63385NL or triad GDE25-2 ??? or GDE25-4 ???? https://www.mouser.fr/datasheet/2/410/GDE25_4-781271.pdf