I could use clarification on the -25 C temperature limit for the Orin. The thermal design guide does a good job defining high temperature limits on a per component basis, but there is no equivalent for low temperatures. Is the -25 C limit apply only at the SoC? If not, which components are constrained by this limit? I’m trying to see whether the system can operate at slightly lower ambient temperatures after startup through self-heating and proper thermal interface design.
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The Jetson Orin NX thermal design guide does provide detailed information on high temperature limits for various components, but it does not explicitly state the low temperature limits. However, based on the provided context and other related information, we can infer some details about the low temperature limits.
Firstly, it’s essential to understand that the Jetson Orin NX module has a minimum operating temperature, which is not explicitly stated in the provided context. However, we can find some clues in the discussion topics and other related information.
One of the discussion topics mentions that the “Jetson Orin 200T module’s minimum operating temperature is only -20℃.” Although this information is specific to the Jetson Orin 200T module, it might be relevant to the Jetson Orin NX module as well.
Another discussion topic mentions that the “Orin NX can’t cold boot at -25℃.” This suggests that the Jetson Orin NX module might have a minimum operating temperature around -20℃ to -25℃.
Regarding the 25°C temperature limit mentioned in the question, it’s likely that this limit applies to the SoC (System on Chip) rather than the entire system. The thermal design guide provides detailed information on the thermal management of the SoC, including the maximum junction temperature (Tj) and the thermal margin (Tmargin).
The Tmargin is defined as the difference between the maximum SoC temperature and the current weighted average of the thermal zones. The thermal zones include the CPU, GPU, and SoC temperature zones. The Tmargin is used to determine the fan control parameters, and it’s essential for maintaining the reliability of the SoC.
While the 25°C temperature limit might apply to the SoC, it’s not clear which other components are constrained by this limit. However, it’s likely that other components on the module, such as the memory and storage devices, have their own temperature limits that are not explicitly stated in the provided context.
To determine whether the system can operate at slightly lower ambient temperatures after startup through self-heating and proper thermal interface design, you would need to consider the thermal characteristics of the entire system, including the module, the thermal interface material, and the ambient environment.
In general, it’s possible to operate the system at lower ambient temperatures if the thermal interface design is optimized, and the system is able to self-heat to a temperature within the operating range of the module. However, this would depend on various factors, including the specific thermal design, the ambient temperature, and the system’s power consumption.
In summary, while the Jetson Orin NX thermal design guide does not explicitly state the low temperature limits, we can infer that the minimum operating temperature might be around -20℃ to -25℃ based on related information. The 25°C temperature limit likely applies to the SoC, but it’s not clear which other components are constrained by this limit. To determine whether the system can operate at lower ambient temperatures, you would need to consider the thermal characteristics of the entire system and optimize the thermal interface design accordingly.
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The -25°C from the Orin NX Data Sheet is the minimum operating Tj (junction temp) of the SoC. I am checking internally if that limit applies to other components as well.
There are other components with the -25°C limit.
Thanks Chris. Can you please clarify which other components?
A list of components cannot be provided.
The Orin NX module as a whole is qualified to operate at a minimum of -25°C.
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