I am using TPS2378 for type 2 poe interface in my design. But when I am putting load of approx. 8W across the output, the voltage is dropping from 54V to around 30V and my other circuit stops working.
I have used the same schematic as given in the TPS2378 evm board (SLVU682).
Also there are two similar circuit in the same board for redundancy and when both are POE's are plugged in, the voltage drops further to about 10V in both the section.
Kindly suggest what could the problem be?