cool power supply

The TDK thing is PFC, but it's not big enough for the required energy storage. That also has to be added externally: 2x 470 uF 450 volts on the eval board.

It's roughly half a power supply, or maybe less, for 3x the price of the complete MeanWell. I don't see the point.

For a pretty big AC-DC power supply, looks like mosfets are about as good as GaN. GaN looks nice for really tiny medium-power automotive or cell phone DC-DC regs or something, but AC/PFC still needs a bunch of energy storage, namely big caps and big inductors in the front end.

Maybe, I didn't check thoroughly, just noticed those 2 caps on Vbus that are definitely input bulk capacitors, be it straight bulk or PFC storage...

Yup. That MeanWell looks very nice indeed, just ordered one 24V for testing. They are $91.26 or so everywhere. Thank you pointing to this one, looks like a little jewel...

Yup.

I'm going to, maybe today, connect one to my Kikusui load box and see how hot it gets at full load.

Las Vegas? If I ever decide to bail on California, I'd move to Nevada. Probably east shore of Tahoe, which is very nice. Funny when you drive from Calif to Nevada: the taxes drop a lot, and so do the potholes.

It would've been interesting, please let us know what you found. I would've done it myself but my load only goes up to 450W and I don't have that supply on hand yet, it is enroute to me...

Yep, that's a nice place. And way less socialism than in, sorry for an obscene word, California :)

One reason I stay near the west coast is allergies. The wind is usually from the west and the closest source of pollen is Hawaii.

This is impressive. It's running with no cooling at all; the fans are blowing on the resistors but not the supply.

Bolted to the side of my rack, it would have maybe 1/2 the theta.

Loading doesn't seem to change the output voltage at all.

Moving air is moving air. Removing that influence from bench measurements is not simple - but you can easily see why shoving a fan in somewhere is awfully tempting.

You should also observe end-use physical orientation of the chassis, if you're looking at a specific application - this can double/halve free air results.

Thermocouples should be on isolation magnetics, which have the lowest spot temperature limit, in most evaluation situations.

This is really tiny:

the only downside is the price, and that you can't get any.

I'll stick with Mean Well.

Wow, that supply is a lot smaller than I thought!

George H.