Hi TI team,
We are using DP83867CRRGZT consumer grade (0DC to +70DC) part for our project intended for residential application (as emergency calling device over Ethernet).
We have conducted temperature testing (from 0DC to +55DC) on open setup (without enclosure) with full load (Ethernet, DMIC, speaker, LEDs, etc.
The board works fine from +1DC to +55DC with full load. Between 0DC to +1DC, Eth link fails (8 out of 10 times) and we lose access of the board. I have attached setup images for your reference.
Ethernet PHY is on the bottom side (opposite side of what we can see in image) of white colored board.
We just kept board in a thick plastic box and closed the box. Power and Ethernet cables are taken out from hole of plastic box as seen in the image. Please suggest what could be the issue between 0DC to +1DC when Ethernet is not working most of the time.
Let me know if you need any other details.
Regards,
Nija Mankodi