Mystery DC-DC Converter

[Michael GilliganParticipant @michaelgilligan61133]

On a whim [as one does], I bought some of these at a good price on ebay

[probably some of this actual batch, because the corrosion looks very familiar]

To my surprise, however … despite the prodigious amount of information writ thereon, I cannot find a data-sheet.

Only a few pins, but ADJ and RTN have me guessing.

… any helpful suggestions ?

MichaelG.

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[Robert Atkinson 2Participant @robertatkinson2]

Hi,

RTN is the “negative” of the output voltage (+5V)

Adj is a voltage trim pin You could try a 10k preset across +5V and RTN with wiper to ADJ pin and see how you get on. If you want 5V just leave it unconnected.

Robert.

[Robert Atkinson 2Participant @robertatkinson2]

Power General were bought by Ault in the early 2000’s This is a PSU designed for telecomms applictions (48V input is the clue). Try this for a similar units datasheet.
https://www.elite.parts/datasheets/d1vx89qr.pdf

Robert.
Edit they say a 1k pot for adjust, my 10k guess was on the safe side.

[Michael GilliganParticipant @michaelgilligan61133]

You’re a Star, Robert

MichaelG.

[noel shelleyParticipant @noelshelley55608]

If you needed to derive 5V on your electric golf cart this is what you need as they were 48V dc. some were 8 X 6v others were 6 X 8V. Noel.

[Robert Atkinson 2Participant @robertatkinson2]

Also usable on some Power over Ethernet (PoE) systems

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