LTC4278Production
The LTC4278 is an integrated Powered Device (PD) controller and switching regulator intended for high power IEEE 802.3at and 802.3af applications. With...
Datasheet LTC4278 on Analog.com
The user asks about achieving PoE dominance with the LTC4278 and the behavior when using both a 12V wall adapter and PoE. The final answer confirms the behavior: if PoE is connected first, it will supply power and transition seamlessly to the adapter if PoE is removed. If the adapter is connected first, PoE detection/negotiation will not start, and there will be no seamless transition to PoE if the adapter is removed. The user also inquires about the possibility of a seamless transition from the adapter to PoE, but no solution is provided.
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