Closed charlespax closed 7 years ago
Add a PTC resettable fuse between the USB connector VCC pin and VBUS.
I've used Bel Fuse 0ZCJ0050FF2G (Digi-Key 507-1802-1-ND) in similar applications.
Add a transient voltage suppressor between VUSB and ground. Something like SMBJ5.0A will work.
I've added a PTC resettable fuse. I'm going for the 0805 package because that fits best on the board. This part seems good: http://www.digikey.com/product-detail/en/bel-fuse-inc/0ZCK0050FF2E/507-1813-2-ND/4156141
I've added a transient voltage suppressor to USB_VBUS. It's the same as what I have on the data lines (PGB1010603).
What protection is needed on the USB power? Right now it's connected directly to VBUS.