The power module has a 4 pin JST GHI connector. I used that pin and use the 4 pin to barrel jack connector to connect to Jetson’s barrel jack connection port. I measure the voltage at the read arrow side and it is reading 5.07 v. When I plug the DC power jack connector on the Jetson Orin Nano, the dev kit is not powering up. Jetson is now on default power mode 0 (15W).
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I’d be happy to help you troubleshoot the issue with powering your Jetson Orin Nano from a LiPo battery.
First, let’s break down the components involved:
PM03D power module: This is a power management module designed for drones, which has a 4-pin JST GHI connector.
4-pin to barrel jack connector: This is an adapter that converts the 4-pin JST GHI connector to a standard barrel jack connector.
Jetson Orin Nano: This is the module you’re trying to power, which has a barrel jack connection port.
Now, let’s analyze the issue:
You’ve measured the voltage at the red arrow side (which I assume is the output of the PM03D power module) and it’s reading 5.07V. This is a good sign, as it indicates that the power module is outputting a voltage within the expected range (5V ± 0.25V) for the Jetson Orin Nano.
However, when you plug the DC power jack connector into the Jetson Orin Nano, the dev kit is not powering up.
Here are a few potential issues to consider:
Voltage mismatch: Although the measured voltage is within the expected range, it’s possible that the actual voltage output by the PM03D power module is not stable or is fluctuating. This could cause the Jetson Orin Nano to not power up.
Current limitation: The PM03D power module might not be able to supply enough current to power the Jetson Orin Nano. The Jetson Orin Nano requires a minimum of 2A to operate, so if the power module is not capable of supplying this amount of current, it might not power up.
Connector or adapter issue: There might be an issue with the 4-pin to barrel jack connector or the barrel jack connector itself. Make sure that the connectors are securely connected and not loose.
Jetson Orin Nano configuration: As you mentioned, the Jetson Orin Nano is set to default power mode (0.15W). This might not be sufficient to power the module. You might need to adjust the power mode to a higher setting.
To troubleshoot further, I recommend:
Verify the power module’s output: Use a multimeter to measure the voltage and current output by the PM03D power module. This will help you determine if the issue is with the power module or the Jetson Orin Nano.
Check the connector and adapter: Inspect the connectors and adapter for any signs of damage or wear. Try using a different adapter or connector to rule out any issues with the current one.
Adjust the Jetson Orin Nano’s power mode: Try adjusting the power mode to a higher setting to see if it makes a difference.
Consult the documentation: Refer to the documentation for the PM03D power module and the Jetson Orin Nano to ensure that you’re using the correct configuration and settings.
If none of these troubleshooting steps resolve the issue, it might be worth reaching out to NVIDIA support or the manufacturer of the PM03D power module for further assistance.
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Maybe that I am using wrong connector for this. Can you please confirm the inner diameter (IN) and outer diameter (OD) of the DC barrel jack connector? Is it 2.5 mm IN and 5.5 mm OD? or 2.1 mm IN and 5.5 mm OD?
What is the rating for the amount of current through this connector? If it is too low, that may prevent Jetson Orin Nano from booting. Note that the Orin Nano has an IDD-MAX of 5A on the voltage input, so the source must comply with that maximum.
We do not have experience with this battery so it would be better to contact the vendor (Holybro?) for the recommended connection for the 5A@5V requirement from Orin Nano.
Hi @ChrisB_NV Power Module is not the battery per se. It is a device that takes input power from the LiPo battery and distributes to motors ESCs etc. Since it has two 5V outputs, I figured I could use it. The spec is showing 5.2/3A. It sounds like maybe the voltage is too low. Since the current is within maximum 5A limit, the current is not issue. Do you agree?
Holybro support is telling me that I should be able to use step down dc to dc convertor UBEC 12A/24A.
However, the above spec is saying output current is continuous 12A. You said we need to have max of 5A on the input voltage.
I just don’t know what the solution is going to be.
If the output is 5.2V nominal and you measured 5.08V, there may be some voltage droop due to a potential overcurrent situation. Since the Orin Nano consumes a maximum of 5A, that is the minimum requirement from the power source. So 3A@5.2V is not sufficient.
That is acceptable since it covers the Orin Nano’s maximum 5A.
Hi @ChrisB_NV Thank you so much for getting back to me. I am some what confused. If the Jetson wants maximum 5A and the UBEC is providing continuous 12A, isn’t 12A bigger than 5A therefore it is a violation of the maximum current on Jetson? Jetson may be damaged as a result.
keeps providing a stable current output of up to 12Amp
The “up to” is the critical part. It can provide up to 12A, so it can handle the 5A maximum that Orin Nano can consume but it does not force 12A into devices. You are right that forcing 12A into Orin Nano would damage it.
