I have found during testing the ORIN NX that the minimum start-up temperature of -25’C is actually pretty accurate. At temperatures below -25’C the behaviour is consistent, an initial current draw then dropping back to a low value. No activity after this, i.e. not starting.
I would like to be able to start the ORIN NX at -32’C and -40’C to meet our customer requirements and qualify reliable operation, including operating at these temperatures continuously.
BTW. The Xavier NX is generally capable of starting at -32’C in practice which I discovered (and also speced to -25’C)
I am designing a pre-heating solution for the ORIN NX. It will be fairly localised under our heat-spreader (two 3D printer cylindrical elements to start with and a controller board).
My questions is: what is the ‘component or components’ on the ORIN NX that would be limiting cold start? It could perhaps be: SoC, DRAM; clock osc.; vregulators; etc. etc.
If I know the area to concentrate the warm-up I can perhaps use less power, better targeted.
The follow on question from this would be:
Once the ORIN NX has been started, and it will be happily generating self-heating. Would it be practical to then reduce the external ambient below the -25’C limit without issue. It is likely to be in a fairly static benign space, i.e. no fans directing airflow towards the module.
We can do further testing on this aspect once the initial start-up problem is worked out.
Just to confirm all the components which we have used in our design are rated to -40’C to +85’C or more including the SSD (Renice).