Electronics > Projects, Designs, and Technical Stuff
Those 48V-input DC-DC power supplies... What do you DO with them?
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westfw:
When Dave talks about salvaging parts from his dumpster-diving find, he always says "I'd definitely save the DC/DC converters." An I always have as well... They're also widely available on the surplus market for shockingly low prices.
But ... what do you DO with them? Usually they're "telco system" supplies, with a nominal 48V input. Which is generally NOT a very convenient voltage for hobbyist projects, or even prototyping anything (other than telco gear, I guess.) Also, *minimum* output current tends to be pretty high.
NiHaoMike:
--- Quote from: westfw on September 02, 2020, 12:37:24 am ---But ... what do you DO with them? Usually they're "telco system" supplies, with a nominal 48V input. Which is generally NOT a very convenient voltage for hobbyist projects...
--- End quote ---
Very convenient for home solar setups and small electric vehicles like bicycles and go carts. Audio amplifiers as well, although in that case it usually makes more sense to have a separate power supply for the logic.
digsys:
Not to forget - everyone is moving to PoE and so are vehicles (4x12V). I already service many installations that are 48VDC bus - they've dumped 240VAC, and all other DC voltages. I make up several DIN rail 48VDC <> xx modules, which are becoming quite popular. Oh yeah, and solar as mentioned
TheMG:
Another example, I'm building an HF linear RF amplifier (for amateur radio) which uses LDMOS transistor running at 50V, needed some DC-DC converters to provide the lower voltages for the control logic so the complete unit can be powered from a single (external) 48V nominal supply.
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