Hi,
Doing an LLC with +/-180V output.....the transformer is split sec.....one coil for each "half" output.
Can i use two TL431/Opto feedback loops, one on on each output...and just parallel the optos' collectors and emitters , as they connect back to the primary side controller?
..Thanks.....that indeed is our intended desire.
There's a bit of worry that if somehow the "halves" get differently loaded, then one will go overvoltage...so just want two feedback loops in there to stop that......basically a safety measure.
So you would need a circuit to pick the maximum of the two voltages for feedback to the regulator.
That may be more than just paralleling the optos' outputs.
What does the feedback circuit look like?