Other Parts Discussed in Thread: TPS23754EVM-383, TPS23754
Hi,
please help to review the attached schematic,the issues is as follows:
1- the POE board cannot detected by a POE switch as a POE device,connect this POE board to a POE switch, the POE switch has no voltage output.
2- plug in a 52V external adapter between VDD and VSS, the MOSFET Q10 is brokendown, some board Q7&Q9 are also brokendown,remove Q7&Q10, test the output is a 12V out.
Hope to recieve a reply ASAP.7217.TPS23756-POE.pdf