Welcome back Mike, it’s been a while 
I don’t know if you remember our discussion but I made an 15-17+mm OTSM/e-switch dual sense boost driver a while back, simpler to build without charge pump gate driver and mux, with an added reverse polarity protection PFET. I assembled it and tested it but had some buzzing issues at full output, strange because ultimately it’s the same as my other drivers when used with e-switch, could have been a bad reflow, bad component, maybe suboptimal layout.
Anyway I didn’t try to do much troubleshooting then and I had other projects. Today I did some layout/tracks optimisations, I’ll order the boards and test, hopefully no problem then.
