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Isolated DC/DC converters "unregulated"?

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Simon:

--- Quote from: Ice-Tea on December 25, 2019, 03:49:52 pm ---Have you considered ADUMs from analog devices? They are, AFAIK, regulated and you have them in a lot of flavors, including high speed isolated data lines..

--- End quote ---

My CAN transceiver is isolated. But anything isolated requires secondary power on the isolated side to work.

Ice-Tea:
Well, maybe consider something like this:

https://www.analog.com/en/products/ltm2889.html

Or if you're married to your current CAN phy:

https://www.analog.com/en/parametricsearch/11036#/p165=0

tszaboo:

--- Quote from: Ice-Tea on December 25, 2019, 03:49:52 pm ---Have you considered ADUMs from analog devices? They are, AFAIK, regulated and you have them in a lot of flavors, including high speed isolated data lines..

--- End quote ---
Their price is bananas.

The easiest solution for this is to replace the 0505 converter with the 0509, and place an LM7805 on the output in SO8 package. Not to mention, this is probably the best way to avoid vendor lock-in and price fluctuations.

Ice-Tea:

--- Quote from: NANDBlog on December 25, 2019, 04:19:03 pm ---
--- Quote from: Ice-Tea on December 25, 2019, 03:49:52 pm ---Have you considered ADUMs from analog devices? They are, AFAIK, regulated and you have them in a lot of flavors, including high speed isolated data lines..

--- End quote ---
Their price is bananas.

--- End quote ---

For the "full solution"? I suppose so, might have something to do with the fact it's a LT product. But combining a isolated CAN tranceiver with their cheapest iso power chip sets you back 3.5$, which is not terrible. And I would assume you can do better if you go through a distri and have some volume to show..H

Zero999:
It's easy to find regulated isolated DC:DC converters on most distributors' websites such as RS Components. Select a wide input voltage range, i.e. 4.5V to 18V, in the search filter, rather than just 4.5V to 5.5V or 12V and the desired output voltage and you'll only get regulated power supplies because it's impossible to have such a wide input range and a non-regulated output. The disadvantage is increased cost. It might be cheaper to go for a higher voltage and add a low drop-out regulator, but that's less efficient.
https://uk.rs-online.com/web/c/power-supplies-transformers/dc-dc-converters/isolated-dc-dc-converters/?applied-dimensions=4293624271,4291833029,4294877092

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