I am facing an issue similar to this case, but the proposed solution can’t be implemented because UL (Underwriters Laboratories) does not accept software modifications as a valid solution.
Could you provide more detailed information regarding the PMIC (Power Management IC) on the Xavier NX module (not the carrier board)? Additionally, I would greatly appreciate it if you could share a schematic or circuit diagram for the battery connections on the module. This would allow us to better understand the existing protection in place.
This is particularly important because UL requires a series resistor to limit the charge current for the coin cell used for RTC backup. However, my TÜV-certified development board does not have this additional resistor.
Any documentation or insights you can provide regarding the PMIC_BBAT or battery circuit on the Xavier NX module would be extremely helpful.
Hallo Trumany,
Thank you very much for your response.
I tried to locate the MAX20024 datasheet but couldn’t find one, as it appears this chip has been discontinued or is obsolete. However, I did come across information indicating that the chip includes a protection feature. I read the following description:
Furthermore, the MAX20024EGXXD/V+T incorporates several protective features to safeguard against electrical faults and anomalies. Overvoltage, undervoltage, overcurrent, and thermal shutdown protections are all integrated into the chip, ensuring that both the power management IC and the connected components are shielded from potential damage.
Could you please elaborate on the type of protection provided on the BBATT pin?
Also, is the current output from this pin limited to a maximum of 5mA?
Lastly, I apologize for asking again, but just for clarification: Is there a series resistor between the RTC battery and the BBATT pin?
