wight,
Thanks for collecting and summarizing that info.
My situation is that I am hoping to keep working with the 2 copies of the driver that I have.
I already re-soldered the couple of components that got “blown away” by my super heat gun trip, and that driver is working again, and in fact, I put an R100 stacked on the R200 and I’ve seen 4+ amps at the emitter when I was just messing around with it. That was the one where I thought I saw a puff of smoke, but I haven’t gotten the nerve to try that again yet. I consider that driver (the one with the R100 in parallel with the R200 my main “guinea pig”, and the other one with the R200, R200, and R100 in parallel my “baseline”.
The new schottky diodes just got here this afternoon, so I’m going to try to replace the SS34 on the guinea pig driver with the new diode and see if it works. If it does still work, I’ll see what happens if I up the Vin/Iin.
Different topic: I haven’t ohmed it put yet, but I was assuming that they just put the two AOEC/A0ECs in parallel, i.e., the source and drain tied together, kind of like all the 7135s on a 7135-based driver are in parallel. Would that NOT be the case in this driver?
Anyway, so I’ll do that (ohm out the AOEC/A0EC) to see if they’re tied together, then I’m going to try to swap the SS34 out, and then see what happens after that.
Thanks again for your help. This has been interesting, and I’m really hoping that if I can swap out the right parts, I can get to that “small driver” that you mentioned. I guess that to do that, potentially, I/we need to figure out exactly what the AOEC/A0EC is and if they’re paralleled, and if they are maybe I can stack more AOEC/A0ECs, like they stack 7135s??