Pi5 Power Issue Under Heavy Oak-D-Lite USB Load

[slowrunner]

While trying to create a reproducible, measurable, large volume topic traffic test i found some sort of reproducible power limitation that jerks the power out from the Raspberry Pi 5 mounted on my Create3. The USB-C power meter was reading 9.5W average with some 9.8W peaks seen when the Pi5 is powering the Oak-D-Lite camera with the depthai-ros driver publishing a raw video image, the neural net object detections, and the stereo depth image topic.

BOOM Pi5 is powered but pulling 0W.

The Create3 seemed to go through periods of "I'm not reliably listening to you" but always recovered.

I don't really know how to diagnose what is happening, so I'm just feeling bummed today.

Oak-D-Lite active - USB 3 Power to device 5W max:

At the Pi5 with Oak-D-Lite and depthai-ros launch.camera.py 10.1W max :

Does it mean it is not a power issue if the crash left a core file?

[slowrunner]

I have determined that running the Oak-D-Lite at full bore drawing USB-C power from the Pi5, along with loading the Pi5 at greater than 50% load, can cause sufficient under voltage to crash the Pi5.

I added a separate 5.1v 2A supply off the 14.4v battery tap into the oak-y-adapter and all tests succeeded today.

The Oak-D-Lite draws between 650 (3.25W) to 700mA (3.5W) but it states a max of 4W or 800mA may be needed to keep it happy.

The Pi5 when detecting a 3A supply tries to limit the total USB current to 600mA. With the config override it "allows" 1.2A total but it seems that drawing more than the 600mA can cause some unpredicted crashes. The processor has a "slight under voltage detector" but that never triggered before the whole Pi5 would blink out.