search

centerclick / feedback

Issues, Bug Reports, and Feature Requests
7 stars 0 forks source link

Increase DC-IN voltage range on NTP250 #50

Closed dave4445 closed 2 years ago

dave4445 commented 2 years ago

The NTP250 has a limited DC-IN range 8-11V this is due to PoE priority requiring this to be <12V.

When DC-IN is >=12V power is drawn from DC-IN instead of PoE and there is insufficent minimum load from the PoE PD input causing the PSE to shutoff power and renegotiate causing a cycling of PoE power every few seconds.

It would be really nice if the NTP200 and NTP250 could take the same power supply ranges. If voltage of DC-IN is >= 12V a minimum load should be applied to the PSE so it will not shut of power.

dave4445 commented 2 years ago

V11 boards are working. Minimum dummy load of about 0.3W is activated when both PoE powered and DC-IN is >11.7V.