Quote Originally Posted by sougata View Post
Hi,

My design was almost the same. I used two MOSFETs (common drain / common source) though. Reason:
  • Better Current Handling
  • Quicker Turn-OFFs -- Because when you use diode OR-ing you loose the low going edge that turns off the MOSFETs fast

Also I used an active Op-Amp amplifier for the current signal.

The link you posted should work absolutely fine.
Ok, I'll try it first.
Just a last question:
If I want to use an OR gate instead of the two diodes like you said, supposing that I'm feeding the chip with 24Volts, what is the output voltage level from ports A and B of the SG3525? I suppose close to 24volt as "1". So, in this case, wich kind of OR gate I should use?