I am currently designing a PoE device with IC Si3402B Isolated refer and circuit my design:
I use an RJ45 port with an internal diode bridge:
I bought the RJ45 but not yet. I tested the external power supply from the 51VDC-1.25A adapter to supply directly to the PWR+ and PWR- power sources. But the circuit does not work and the Si3402B chips heat up very fast.
As far as I understand, the power from the RJ45 will be the same DC voltage as the adapter. Is it true ?
I do not know where I was wrong. Please help me find the wrong point in the circuit I design?
I am a new member, if anything is not accurate, please help me know about it.