Short description of my understanding of this ICs operation My understanding of this IC is that it takes two same voltage power supplies and combines their current output. If one supply's V starts to droop, the IC senses that change from Vin1 (or2) to OUT1 (or2), and drops the voltage of the other supply using the MOSFET to continue voltage matching.
I'm attempting to combine 2 outputs from two USB battery packs.
My question is mostly about the current sense resistors, I believe that they are supposed to create a drop in the voltage in order to know how much current is passing, but why is this necessary? When one of the battery's voltage starts to drop, the Vout sense pin should see it and drop the other battery's voltage in kind. No resistance needed? Why does it even need to know how much current is being sourced if all it has t do is match voltage?
Also, compared to the 2mOhm resistance of those resistors, the resistance of the MOSFET and wire connection is much higher. The resistors are also placed after the Vout sense pins on the IC, so how do they do anything?
The goal is to create ~24W and put it through a DC-DC converter to charge my laptop. If there are any obvious problems with this idea, it'd be much appreciated if you point it out! I'm about to buy all the components.