Tool/software:
We found the initial plan in Priority Power MUX using Ideal Diodes in Automotive Zonal Modules document Figure 9.
The system works as I would expect and I can turn on and off VPRIM and VAUX as I would expect with no issue, the computer on the output side stays on and has no glitches or problems.
I do see 2 things that I would like support on:
#1) The problem that I am having is the Secondary/Aux LM74900-Q gets hot ~70°C when I am using the primary path, in this case the Primary is only around ~30°C. I would expect the Secondary/Aux LM74900-Q to be at least as cool as the primary as its not doing anything.
#2) Then when I switch over to the Secondary/Aux (by turning off the PSU feeding VPrim) the input mosfets get hot ~58°C. I would expect them to act like the primary path mosfets which never go above ~30°C when they are in use.
Please let me know if you have any questions or need more info.
Thanks
