/diy/ - Do It Yourself

I've been trying a bunch of opamps for my dummy load, and so far one of the best has been COS8551TRA, which is an Asian brand but it is a truly rail-to-rail high precision chopper with an excellent phase margin so it is unity gain stable without any compensation. The only problem is it is 5v. So it cannot drive the MOSFET above 5v and so the maximum current is limited to about 3A. I wonder if I could put some voltage shifter in between the opamp output and the gate. Would a bjt work? I tried some configuration and couldn't get it to work. And the feedback loop would probably become too unpredictable.