Some months ago while seraching for the samllest 12v brick possible I found this: A small device by delta that is supposed to be mounted on a pcb with all the filtering you want/need and it´s 111x51x14mm, so ultra slim. I found out that is GAN based or at least partially, and it´s not that new, and it´s 500w
TDK-LAMBDA has a 720w one but it´s veeery expensive, but it can turn on and off by itself, so one thig less to put on the pcb you have to build for it.
AC-DC Power Supplies PFE 300W - 1008W AC-DC Power Module
www.emea.lambda.tdk.com
All these are using thransphorm gan fet
Transphorm is a global semiconductor company that develops fully-qualified 650V GaN power devices for high-voltage power conversion applications.
www.transphormusa.com
And also the 1600w PSU from corsair is gan fet powered.
The other interesting thing I found was this on the texas instrument webpage. It´s a reference design to use their gan fet technology on a 12v 1000w psu. It´s just a reference design, but I find it really interesting.
Normally these thing have 95%+ efficiency when they are working between 20 and 90% of their total workload. it´s incredible the flatness of the efficiency curves, I find this quite incredible. The cooling requirements for this units have to be very low, and also they work at such high frecuencies that ripple noise is supposed to be very low, so more space savings there.
I imagined a 12v brick made with these gan fet PSUs attached to a pico psu on the 24 pin and then, the rest of cabling for the cpu and gpu sockets but with a small pcb attached to them (like the pico psu, but smaller) with the filtering caps there, not in the psu itself, so you divide the volume ocupied in several places. Granted it will led to more problems, because connectors would be bigger, but the main brick, could be very small, with just the Emi filtering at the entrance of 220v and the hold up time caps after the ac-dc first phase at 650v. All the rest of the filtering could be somewhere else.
Screenshot 2022-06-23 at 16-14-50 Asus Made the World's First 300W GaN Charger for its Monster...png
