Looking for a cheap alternative for moderate power Rsenses. Just for giggles if i wanted to make my own Rsense using copper wire, assuming a max drive current of 5a, Id need 14-15 awg and at a foot the resistance would be ~2.5mOhm. To accomodate for this in my circuit I can only think of 2 methods for dealing w/this, both of which prolly wont work very well.
If I put a gain stage in to boost Vsense to the gate drive op amp the gain would have to very large. Im guessing this would result in current overshoot as the increased gain would kill the bandwidth and wouldnt be able to respond fast enuff.
If I divide down the Vin after the first buffer the signal becomes smaller than the gate drivers in offset.
Maybe if I combined both of the above and found another material that was more resistive?