Other Parts Discussed in Thread: TIDA-01411, TPS23730
Dear *,
1) i read that the CMC in Poe magnetic is recommended on cable side but in TPS23730EVM-093 magnetic used have CMC with three-wires on phy side.
1a) Why do you use PoE magnetic with CMC in PHY side?
1b) Is there a benefit to use three-wire CMC instead of standard two wire CMC?
1c) Can we use Poe Magnetic with CMC (like VP6014 HF) on cable side?
2) ESD Protection recommendation between Poe magnetic and Diode bridge? (slua469, slua736 and TIDA-01411)
2a) The MOV are required for lightning surge protection only is that correct ? What test or standard describes the requirement of MOV?
2b) i can't find in the mentioned docs above following : Bidirectinoal TVS1 and TVS2 between
Are these TVS required for ESD protection?
Also what is better to use here a TVS eg 5.0DMDJ58CA or an SIDACtor thyristor eg P0640SDLRP ?
Protecting PoE Equipment from Overvoltage
2c) in slua736 there ia TVS from VSS to RTN used while in TPS23730EVM-093 there is only a shottkey diode B3100-13-F from VSS to RTN why?
3) Over current protection on PD side
3a) i don't see any fuse protection on PD side , is this not needed?
3b) if we like to add fuse, where is the recommended place to put a fuse
- before diode bridge on all for wires ( need 4 0603 chi fuses)
- after diode bridge ? and then before or after CMC filter on VDD ?
3c)
do you recommend , chip fuse, resettable fuse, efuse or DTCS TCS-DL004-250-WH
does TI has a recommended efuse for Poe?
Best Regards,
David.