> There's no such thing as 'simple' transformer-based DC-DC conversion Pretty much all DC-DC converters nowadays are switching - and those chopping - and - rec

> There's no such thing as 'simple' transformer-based DC-DC conversion Pretty much all DC-DC converters nowadays are switching - and those chopping - and - rectifying steps you mention would be standard for any DC-DC converter whether or not it uses a transformer. In this particular case, a transformer is necessary in addition to those components, as opposed to a simple fixed inductor. > EPR is 48V Yes, I got confused with the maximum rating on the most popular EPR capable tester (Power-Z KM003) > Switching regulators are a pretty well known quantity now I'd agree with this, insofar as they're very common and we know how to design them effectively. With that said, I think it can be observed that topologies used with higher voltages generally do come with increased cost and complexity. First of all, the transformer is going to be a custom part, as opposed to something with jelly bean substitutes like inductors. Second of all, the kinds of components typically used with higher voltages like 48V are less integrated than ones for lower voltages, likely due to the kind of process technology you need to use to handle it. It's possible to get "smart" drive chips for applications like Intel processor VRMs that integrate all of the switching, gate drive, and control logic, but with higher voltage you typically have to source discrete gate drivers, controllers, feedback, etc, and I'd think it does add complexity.