Hello,
This is expected behavior. Having the output voltage never drop is called "smooth transition" or "hitless failover" in PoE market.
Please see the following materials for training on this topic:
Blog: https://e2e.ti.com/blogs_…
Hello,
1. Reference Design: https://www.ti.com/tool/PMP20859
2. A transformer that supports 72W output and a 27V-58V input is going to be very large and probably have thermal issues.
I would suggest using a buck-boost converter to boost your adapter voltage…
No, this will not prevent the potential damage. The minimum required circuitry is in the PMP20859.
If this post answers your question, please indicate so by marking this thread as resolved. Thank you.
Regards,
Michael P.
Applications Engineer
Texas…
Hey Jack,
1. The previous design I sent has adapter priority with TPS23730 as does the EVM
2. General – Requires 48-V, isolated output (from mains and ground) adapter • Benefits – Adapter inrush current is managed when the PoE source (PSE) is not present…
Part Number: TPS2373 Other Parts Discussed in Thread: PMP20859 Hi team
We are using TPS2373-4. in one of our application. We are observing Glitch in 5V output power whenever we are switching from DC to POE supply. Our Output requirement is 5V @13A current…
Hello Shinichi,
The TPS23734EVM-094 has an adapter for OR-ing option 2.
Option 3 puts the adapter on the output, and the diode is not needed.
Do you need adapter priority or PoE?
For smooth transition, which means the output power is not dropped when…
Hi User, Are you intending to do non-standard UPoE or PoE redundancy like PMP20859? Our PMP20859 design is designed to be compliant with IEEE802.3bt & provide hitless redundancy. It is not intended for non-standard methods of >type 2 power (UPoE) since…
Hi Oliver,
1. As the EVM is designed, yes it would NOT have smooth transition between PoE and adapter.
2. Auto MPS will work and PSE will remain connected. The pass will be OFF and adapter will be powering the DCDC.
3. I recommend looking at the training…
Part Number: TPS23754 Other Parts Discussed in Thread: PMP21103 , PMP20859 , TPS2372 Dear Team,
For 2 port .at 12V 50W, dual-input redundant PoE PD with smooth transition.
Which reference design will you suggest?
BR
Kevin
