ke7c2mi
DIIDevHeads IoT Integration Server
•Created by ke7c2mi on 9/9/2024 in #pcb-and-analog
Designing an SDR with PoE Power Supply: Synchronizing SMPS and Managing Heat and Noise
TL;DR questions:
1: When to think about synchronising SMPS together? Am I overthinking the whole thing? Is it possible enough to have the LM5070 @ 600KHz and the TPS65217A @ 2.25Mhz and they are unrelated enough there is not a high chance of a problem?
2: Are there better strategies / perspectives to use in looking at this?
3: Is using a very integrated PMIC like TPS65217A in an application like this even a good idea? I picked it because it's highly integrated and make roughly the voltages I want, DVS and current sensing are "Nice to have" and it does it all. Are there other parts I should be looking at?
4: Is there a poor mans guide for simulating PDNs - could I investigate this better before making it? (I've tried to play with OpenEMS several times, I'm not against trying again, but it's a LOT of work). My knowledge of IBIS is mostly that it is a bird.
5: Anyone want to route a DDR3 interface some time in the future (or more general collaboration!)
6: What have I totally missed or not even though about here? (I accept I could be providing some tangible goal for noise, I do not have one today less is better)
(Pardon the wall of text.... I can share the project next time, after I tidy it up a bit 😛 )
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