Other Parts Discussed in Thread: LMV431, LM5117
I am designing an Addressable LED strip power supply for a project where I'll be supplying 5.25V @ 13 Amps using a LM25117-based buck converter using the CM pin.
I am trying to implement TI's POWER|designer (No 131):
www.ti.com/.../snva609:1230:0]
where the CM pin is used to current limit. The issue is that the application note nor the device's datasheet doesn't really provide enough information to calculate the proper resistor divider for the CM voltage. An WebBench doesn't seem to simulate the CM output. I can't seem to find any relevant formulas to relate Ics vs Icsg in the datasheet. My quick napkin calculations didn't shed any light on how the authors of that App Note were able to show the relationships between the chosen 100k vs 200k divider connected to the LMV431.
I'm designing a prototype PCB; but I'd obviously like the circuit to be functional.
Can anyone shed any light on a proper implementation?
