Hi joeyd999,I recognize that I am beating a dead horse, but I realized in retrospect that I could make tuning the loop filter easier if I could separate the heavy load of the wire from the filter itself. See attached.
I added R7 which makes selection of reasonable values of R6 and C1 far easier.
I am pretty sure that the chosen values for the filter are adequate for the task, if not maybe a little slower than it has to be. But without knowing the thermal characteristics of the wire, it'd be impossible to determine the fastest possible filter without potentially introducing instability.
Even if OP doesn't want this, maybe someone else would like to cobble it together and tell me if it works. I don't have the time!
I'm trying to build the circuit, seems to be working, however I managed to make a mistake and damaged the IC. Currently waiting on a new one. Meanwhile I'm now trying to understand the circuit better so I can change the parameters of Vin, Rwire etc..
I'm trying to supply the circuit with 12V and Rwire resistance to 4ohm.
Moderator edit: New thread created from old one.