aerodev434
commented
3 years ago Update: I tested the above, here's the finding:
Everytime the MOSFET is switched on with the above wiring configuration, it blows the fuse. This leads me to believe that the connection at the Drain (12V+ in this case) is being shorted to ground through the 5V GND line at J1 probably because the buck converter does not provide isolation.
I'm updating the image above with a note to not follow it.
I tried to remove the 5V GND line at J1, in this case the MOSFET does not seem to be conducting at all.
Hello, thank you very much for this schematic!
Hope you don't mind if I post a question here. On the D4184 board do you think this situation would cause a short: 1) Directly connecting Vout+ and Vout- by connecting a wire to both (at the screw terminal) 2) Connecting power to Vin+ and connecting Vin- to a Load, which is grounded to the chassis.
When the MOSFET is turned on, would this cause a short between the VOUT- (Drain) to VIN- (Source) and 5V GND. I suspect the buck converter does not provide isolation between the 5v gnd and 12v gnd.
It's this converter here: https://www.amazon.com/Regulator-DROK-Automotive-Waterproof-Transformer/dp/B081RMFSCG
I would certainly appreciate your or anyone else's input on this. Thanks!
I posted 2 diagrams. The first is the D4184 Connections The second is the whole circuit, the D4184 sits on the right side.