Hi, Could not find a datasheet for the FET .. That said .. I wonder how you arrived with the attached schematic ? Have a look at the datasheet: http://www.ti.com/lit/ds/symlink/ucc27537.pdf Cheers, Manu On Fri, Jun 28, 2019 at 9:54 PM doug metzler wrote= : > > I'm trying to design a circuit that takes a 24VDC input signal to power a > downstream system (motor driver board). It's about 16A peak. The trick = is > it needs to latch, and it needs to be turned off with a logic level signa= l. > > I thought I could just use a FET and a driver chip, but I've tried 2 > different drivers and as soon as I power the circuit the driver chips > smoke. I tried the VOL3120Tand the UCC27537DBVR. The VOL smokes > immediately. The UCC works the first time, but you can watch the > components get destroyed as somehow high power gets to the signal side th= e > second time. > > Clearly there is something I don't understand. I'm attaching the UCC > schematic, which I thought was a simple solution. > > [image: image.png] > > Thank you for any help, I'm completely flummoxed by this one. > > DougM > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .