The only thing packed in tighter than that GaN power supply was this script... 30 minutes of no filler, methodically organised, and easy to follow. Great stuff. A sub well earned.

That PCB coupled inductor is so cool

As a designer of high power switch-mode GaN transmitters, I found this video very interesting. You really nailed the key points with great explanations. All the little subtle design details is what makes a difference between an OK design and a great design.

THANK YOU! I'm taking a new interest in electronic design after a gap of almost fifty years (yes, fifty!). My late dad was a designer, and taught me to solder aged six, and showed me how to build (and understand!) a binary counter aged seven (my primary teachers didn't know what to make of me, or him!). For most of my life I've been an operator/user of technology, rather than any sort of engineer, and although that was fun, I'm really enjoying the mental stimulation of 'proper' electronics, most recently in reparing a batch of SMPS, all with different faults! Your explanations were clear and easy to follow, and the effort must've been immense in preparing all the detail and graphics. Again, thank you, and keep at it!

Just to repeat what everyone else has pointed out, the level of detail, and depth of knowledge even taught me a few new tricks (and I worked in power electronics for many years way back when).

Just to add a small comment, there are few types of GaN switches. The one there from Transphorm (now Renesas if I am not wrong), is a Cascode device, where the GaN HEMT is a normally on device and it is driven by a low voltage silicon MOSFET. It is generally kind of easier to drive, but prone to oscillations, higher parasitics, etc. Nexperia also makes Cascode GaNs. Then there are normally off GaN, where the GaN is driven directly. Here then subdivided into Schottky gate (Infineon, ST, plus many others), which is a isolated gate and driven between 0V (sometimes slightly negative, like -3V) and 5 or 6V, and GIT (Infineon), where there is a peak turn on current and then a small current to be maintained on the gate, which complicates the driving but gives better performances and a more robust gate. Another one is the direct drive approach from TI, where a normally ON is directly driven with a negative voltage to turn off, and a low voltage MOSFET is placed under the first, as in the cascode, but that is maintained always on. In addition, the smaller output capacitance (and charge) and the lack of the reverse recovery allows the GaN device to use different circuit topologies, especially for the PFC (eg. a totem pole), that is required when you go above 75W.

A while ago I saw a video of someone who made a motor that used PCB coils but I didn't think it could be taken to a level like this. I recently discovered your channel and the content is of very high quality and professionalism, congratulations!

I've been in power supply test for 45 years. Excellent video. No technical mistakes I could see, especially for a young guy!

The mechanical design effort that went into the GaN power supply is very impressive. It was not quickly slapped together in just an afternoon.

This channel is well on the way to 1M subs with uploads like this.

По-моему, первый человек, кто подробно объяснил не только преимущество GaN, но и всей схемы на нём.

The best explanation and comparison of the 2 topologies by far, shaming all reputable electronic bloggers out there. No fluff or personal opinions, no distractions, no self promoting of how great he is, at the same time all the necessary visualisations and proof to make his points. This channel deserves to be rated at the top of the charts.

I'm 52 and in electronics as long as I can remember. I learned something new today and must say, you are brilliant engineer and this video is awesome, I'm really impressed at your knowledge at such a young age. What amazed me the most was the transformer, but the whole power supply is really elegantly designed. Top s*it I'd say. Keep on and I'll watch your other videos soon.

Excellent presentation! As a now very ancient (and long retired) Electronic Engineer, I had been wondering about these new GaN power supplies for some time. The high quality of the design and manufacture of that TECS45F was immediately apparent.

As a 30 year + electronics designer, i can say i'm overwhelmed with the high quality of your show, where others would mention the conduction loss of a diode in a circuit, you measure it and show it, so every viewer can understand in detail. Just an example. Beginners as well as seasoned developers can learn a lot here. Great job!

Please don't see this youtube thing as "just a thing that i'm doing at the moment". Your videos are awesome, you have a lot of advance knowledge and you are very entertaining. Don't let this channel die. I know it takes a lot of effort to create a video and sometimes the videos don't pay the bills but try to find sponsors and allow us to be involved with your knowledge while you pay for the bills. Take a look on how much subscriptions you have earned with just a few videos in less than 2 years. This means a lot, you are close to 100k :) More youtubers should be like you. Thanks and congratulations for your work.

it's a good day when ElectrArc uploads

This is incredible. There were so many insights and detailed explanations that I am astounded it was only a 30 minute video. It probably doesn't help that I was rewatching whole sections just to absorb a little bit more.

I have been wondering what GaN was about for some time. I am so glad you made this to educate us all. Thanks for not leading us through how you grandmother was born and her life story before getting into the meat of the video. So many take so much time telling us about irrelevant stuff. The direct approach is always appreciated as is the clarity of your presentation. So much good information here!

well, whis was probably some of the best well-spent 3 hours of my life, following this series in a binge, and learning so much about power electronics