How Do You Protect A Circuit?
Hello guys,
I am getting DC power from a jack barrel and I would like to prevent users from frying the circuit's chip down the line by inserting a wrong cable.
I do not want my system to be under nor overpowered. The cable provided is rated for 28V 3A.
My current schematic has a MOFSET P to prevent reverse polarity. A PPTC fuse down the line cuts at 8A. And on the left I do have a TVS diode for the voltage (which start conducting at 28.8V).
The problem is I feel values are too cramped together and this is not viable long term. For example D1 can deliver until 50V but the MOFSET is rated for 30V. Also the fuse is for 8A. I feel like if my components are rated for 28V, and you send 30 or even 50 for a brief second, wouldn't that fries them?
How would you protect your system to always have clean 28V 3A?
On my side I've started searching about crowbar or eFuse, but still unsure about if I should use these or my magnificent schema.
Thanks for help (my first PCB 😋)