Part Number: DS90UB953-Q1
In my case, my customer maybe disconnect the DS90UB953-Q1 board from DS90UB954 board while the system power is working, and POC power mode is used in my case.
Is there any damage risk for both of DS90UB953 and DS90UB954?
For example, the energy stored in Induce and Cap will go through the AC couple cap and into RX and TX pins , Can this energy damage 953 and 954?
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In reply to Junqiang Shi:
In fact, 953 are connected with 954 HUB with push-pull connector, sometimes the customer need to replace the 953 but forget to turn off the system power.
The energy stored in INDUCE(POC couple INDUCE) will go back to TX pins of 953 , I think it maybe destroyed 953 by this huge induced voltage, is it right?
In reply to decai wang71:
I think you ignore it in our ref. design. May I know your PoC design in your sch.? I will point out it.
Is it R25 in 953EVM schematic?
Please see the red rectangle, if POC mode is not used, do these components in red rectangle impact the SI and also arise EMI issue?
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