ElectrArc240 has clearly knows what he talking about and has spent a long time testing different aspects of two similar power supplies to succinctly demonstrate their differences: one with a GaN hemt main switch and the other a silicon mosfet.
The video also points out performance differences that are nothing to do with GaN or Si, but simply from the GaN supply being a newer generation unit.
If you watch it, admire the beautiful high-frequency sub-pcb in the GaN psu, which combines GaN switch, planar transformer windings, primary ceramic capacitors and secondary ceramic capacitors – a credit to its manufacturer Cosel.
The ElectrArc240 YouTube GaN psu video can be found here.
It is from that video that the still images on this page have been copied. Please get in touch if this image use is inappropriate.
