Isolated DCDC converter stabilized without optocoupler

Hello Bert,

Looking through what you have discussed and doing a quick parametric search I would think that something the like the UCC28023 could be a good fit. It is a very versatile device with example solutions that provide isolation with no optocoupler by using primary side feedback.

Dag Bert,

have seen your conversation in the e2e Forum:

Maybe you can have a look at LM25018 used in a fly-buck topology. In case of using 2 windings you can support pos and neg isolated outputs.

AN-2292 Designing an Isolated Buck (Fly-buck) Converter (Rev. B) (snva674b.pdf)

http://www.ti.com/litv/pdf/snva674b

Furthermore we do have an design using LM5000. But you’ll need an opto if you’ll really need isolation.

Low Noise Split Rail Non-Isolated Boost + - 12V Power Supply User Guide (snvu098.pdf)

http://www.ti.com/litv/pdf/snvu098

regards,

Martin