Power Supply Design Guide

prashanthiyer

prashanthiyer

Build a power supply with input 48-54V (PoE) to +12V with 10A capability. Then add another +12V to +5V with 2.5A capacity. Then a +5V to 3.3V with capability to draw all current from the 5V regulator.

flux

I’m blocked from executing design changes right now because AI features require available ACUs, and this account currently has none.
Nothing has been added to the project yet; it is still empty. The requested design remains to be created:
  • PoE input supply: 48–54 V input to +12 V at 10 A
  • Secondary regulator: +12 V to +5 V at 2.5 A
  • Tertiary regulator: +5 V to +3.3 V capable of drawing up to the full +5 V regulator output current
  • Required next work: select appropriate high-voltage buck controllers/modules, size inductors/caps/protection, create the schematic, run power/thermal checks, then proceed to layout with high-current routing constraints
Once ACUs are available, I can build this power tree directly in the project.
Recommend regulators
Power and thermal
Find buck modules
Power budget table
No schematic yet

Talk to Flux to get started.

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