I’m designing an external power source for the Orin AGX 64GB developer kit, but need more information on the actual worst case power consumption. I’m aware that this will be a function of the computational load and peripherals connected, but let’s assume we are talking about just the base developer kit with no external peripherals being driven, max computational load.
Table 7-1 of the SOM datasheet tells us the absolute maximum SOM input is 5.4A from a 20V supply, so ~108W for just the SOM, absolute worst case. Maybe this is meant as maximum input current before damage.
However, page 7 of the same datasheet states “JAO 64GB Maximum Module Power: Up to 60W”
and then Table 6-2 of the Orin AGX Developer Kit spec sheet gives us this:
Which states 5.0A from a 7-20V input, but then the notes below state that this is actually the current available at the peripheral header and not the actual development kit power consumption.
The documentation and support replies on many forum posts (DC input power requirements for Orin?) suggest a 12V typical input, but 5A at 12V (60W) is very different than 5A at 15V (75W) or 5A at 20V (100W).
So what is the minimum power required for an external power supply to reliably power the Orin AGX 64GB development kit under worst case computational load with no external peripherals connected?
Table 7-1 of SOM datasheet are Absolute Maximum Ratings and 5.4A @20V is EDPp (Electrical Design Point peak) current based on 6us moving window. This is the max power input to the AGX Orin Module.
If your goal is to design a power supply for Orin AGX 64 Developer Kit, then you should consider Table 6-2 from Orin AGX Developer Kit spec instead. This will be the power input to the Developer Kit i.e. your power supply should be capable to supply these max currents. Refer to Table 6-1 as well, as it gives the power allocation per interface on the carrier board of the Developer Kit.
Refer to Table 7-1 in AGX Orin data sheet for power needed if just supplying the module i.e no peripherals connected.
Thanks for your reply @sgursal
So according to the SOM datasheet page 7,
“JAO 64GB Maximum Module Power: Up to 60W” I am assuming this is continuous, and Table 7-1 of the SOM datasheet is the absolute maximum peak over 6us (5.4A, 20V, ~108W).
So for that let’s assume I have a regulator which can provide ~100W continuous with enough bulk capacitance to handle peaks.
I am confused by Note 1 under Table 6-2 of the development kit spec.
“The values shown in the “Max Current” column indicate the total power available on the expansion connectors minus the current used on the platform”. I read this as saying this table shows power available on the system supply rails, NOT what the system is actually consuming. Is there a table of the current actually used on the platform?
Table 6-2 gives the max current available on the interface connectors on the Dev Kit/carrier board. Carrier board mostly has voltage regulators to provide different voltages used in the platform other than the interface connectors. You could assume a typical efficiency of ~85% for these regulators to arrive at power dissipated on the carrier board. VCC_SRC of 20V@5A (100W) expected to be sufficient in your use case.
We do not provide this data specifically for the carrier board. Figure 6-1 gives the power tree flow for the carrier board and the carrier board design files are available in Jetson Download Center | NVIDIA Developer.
