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Crankshaft

Where to but 60v - 5v DC-DC converter

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Hi

Looking for a DC-DC  converter to get 5VDC from my 48 volt battery string.

This is to power a Raspberry Pi / Venus box.

I could use a regular 230VAC adaptor, but if the inverter shuts-down due to battery low-voltage, I lose the connection.

 

 

 

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42 minutes ago, Crankshaft said:

Thanks, will check it out.

What concerns me is this:

"(Note: Higher than 50v can not work for a long time)"

 

I saw that. It is very strange wording - I think as long as you stay well below 3A, you should be fine. A raspberry pi 2 should not be a problem, but the option in the post above is better.

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@Crankshaft I'm all for getting a cheapie rather than buying some expensive kit if the same can be done.

My concern here for your part is what happens if that DC-DC fails.

Many Voltage regulators will simply pass input through if they blow/fail. (Internal short circuit)

Lost a couple of pieces myself with the older LM3xx series. Luckily all during development phases, so no real biggies.

My concern if that happens you buy a new Pi which makes the Meanwell or even PULS seem fairly priced.

Alternatively maybe clipping with Zener or some quick protection circuit?

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3 minutes ago, Riaanh said:

My concern here for your part is what happens if that DC-DC fails.

Many Voltage regulators will simply pass input through if they blow/fail. (Internal short circuit)

Lost a couple of pieces myself with the older LM3xx series. Luckily all during development phases, so no real biggies.

The older technology linear voltage regulators that you refer to could short but the switched mode DC-DC converters die with no output when they fail.. 

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5 minutes ago, Richard Mackay said:

The older technology linear voltage regulators that you refer to could short but the switched mode DC-DC converters die with no output when they fail.. 

Mosfets like to fail short-circuit. In this case that would result in full power to the output.

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