We use ADV7262 on our system.
ADV7262's TMDS lines are connected to the sink which have pull up resistors to 3.3V. In this case, sometimes "1.8V power line of ADV7262" is flow back current from Sink.Therefore our system effect 1.8V line for other LSI.
Does ADV7626 of TX have "the inflow prevention circuit"(reverce current prevention circuit) internally?
if yes, maybe our system sometimes does't work this circuit.Please advice us this phenomenon and any countermeasure.
Thanks and Best regard,
I assume you are seeing this condition when the ADV7262 is supposed to be powered off and the sink is still power up. I think the reverse current is going through the ESD protection circuit. You can stop…