Now as above, but this time with three Bucks in parallel...so...
Hi,
The attached shows a discrete version of the UCC29002 Load share controller. (LTspice and jpeg)
There’s a “share bus”, which simply shows a voltage representing the current output of the highest current stage. All stages compare this with their own current level. There is a series 50mV offset voltage added to each stage’s (current measurement) voltage value, so the one with highest current definitely does not ever try and reduce its own current. This does mean all the stages can in fact never have exactly equal current, but it gets close enough.
Anyway, do you know how to best do the circuitry for the 50mV series offset?....as shown it’s a bit much.