Jetson TX2 Developer Kit USB interface question

Robotics & Edge Computing Jetson Systems Jetson TX2
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1

Hey, i have a question regarding the micro ab USB2.0 Connector circuitry.

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The USB OTG VBUS is implemented using APL3511 Load switch.

looking at the APL3511 data sheet:

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the VOUT AMR is up to 7V. but when there is a plug or unplug even while there is current flowing through the cable itself, i can get inductive ringing that can cause the 5V line to temporarily go up to 10V which passes the load switch AMR.

Now for the TVS there, MSP5.0A-M3/89A, it clamps only to 9.2V.

also for the USB0_VBUS_DET pin of the jetson, when i power the jetson from 5.5-9.5V i can pass the amr which is VDD+0.5

So i don’t understand how it is okay, or maybe that case i mentioned is not so common? or maybe there is something else i’m missing…

3

At what point in the circuit do you probe and see the 10V ringing? For how long is it at the 10V level and do you have an idea of how much current is passing through?

4

i don’t have the developer kit. i’m making a carrier myself and was looking at the dev kit reference and was wondering about the usb otg interface.

i only did a simulation of a simple LC circuit. i found this blog that talks about it:

where he used snubber circuit to solve that issue.

so i was wondering how you solve this issue in your circuit here