Hi everyone,
We are encountering a peculiar powering issue with a BeagleBone AI-64 (BBAI-64) and would appreciate any advice or insights.
Problem Description:
We have a custom power supply board that is designed to provide a stable 5V output with a maximum current capacity of 7A. This power supply board has successfully powered other devices in our setup, but for one particular BBAI-64, it fails to power the board.
Interestingly, the same BBAI-64 powers up without issues when connected to a standard power supply brick rated for 5V and 4A.
However, when testing further, we observed another anomaly:
• The BBAI-64 fails to power up when the 5V 4A power brick is connected through a watt meter.
• The watt meter readings during this test showed approximately 1.6A at 5V before the board refused to power up.
Additional Notes:
• Other BBAI-64 units in the same environment do not exhibit this behavior, suggesting the issue might be specific to this individual board.
• The custom power supply board has been tested for stability and can deliver the required current and voltage.
• The watt meter seems to introduce some form of resistance or impedance, but it’s unclear why this prevents the board from powering up, especially given the low measured current draw.
Questions:
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Has anyone else experienced similar inconsistencies with power delivery on the BBAI-64?
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Could this behavior indicate a hardware fault (e.g., with the power circuitry) on this specific unit?
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Are there known quirks or requirements in the BBAI-64’s power design that could explain why it behaves differently with the custom power supply or when a watt meter is introduced?
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Could there be an issue with inrush current or another transient phenomenon during startup that might be causing the power supply to trip or behave unexpectedly?
Any advice, suggestions for further troubleshooting, or explanations would be greatly appreciated!
Thanks in advance for your help.