Dear flatulent,
Thank you for your suggestion.
I am going to have a hot spare system where both are on and connected to the load, that's why I need the or'ing doide.
The problem is I have no solution to cut the heat down if I use the low Vf schottky doides(Vf is about 0.4v), but I am not familiar with the power MOSFET, I found that most MOSFETs with very low Rds(on) have the internal inverse parallel diode. So if one DC/DC module fails, the fail one will become the load of the good DC/DC module through that internal inverse diode, could you please give me more detail suggestion? eg, MOSFET part number, external management circuit part number, or schematic.
Regards,
cdcll