How to design high-side current sensing solutions using comparators

[@michaelderrenbacher4685]

That's some cool stuff

[@marko6394]

What if the voltage supply to the load is much higher than the supply voltage of the op amp? For instance, if you were trying to measure the current to a load fed by a 48V battery.

[@mortenlund1418]

It seem like it is more simple to do high side currentsensing

[@naasikhendricks1501]

Just make sure the tolerance 0.1 and better is important. The other part is check CMMR must be 80dB or greater. Offset error can be between 20 to 40% if you don't keep that in mind.

[@jessstuart7495]

To use a comparator for a high-side current sense, it must have an input common-mode range extending to the positive supply. Your typical jelly-bean comparator does not have this capability. The TLV1701 does.