High Voltage GaN FETs - Part 1: Several 100 Volts

RE: High Voltage GaN FETs - Part 1: Several 100 Volts

Jan Cumps — Sun, 11 Oct 2020 12:16:02 GMT

I'm revisiting this GaN design. To see how they bias the upper half of the half-bridge, and to train my dc load.

[View:/resized-image/__size/572x291/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-816a8165-a41f-41e0-951e-8b089258109f/1258.contentimage_5F00_188508.png:572:291]

RE: High Voltage GaN FETs - Part 1: Several 100 Volts

Jan Cumps — Thu, 26 May 2016 12:02:46 GMT

I'm ready to continue with the series.

The GaN FETs that I was going to use in this exercise hadn't arrived @Cumps Lab yet (the mysteries of sales orders going into odd directions) .

[View:/resized-image/__size/960x720/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-816a8165-a41f-41e0-951e-8b089258109f/contentimage_5F00_188507.png:960:720]

I now have everything needed.

On the right: uncommitted motherboard without FETs. A (rather smart) configuration that lets you evaluate power transistors in several configurations.

and arrived this morning, delivered by [mention:b60dcf9c31a8492ea6badbcc611934d0:e9ed411860ed4f2ba0265705b8793d05]'s friends FedEX:

On top left: daughterboard with 2 GaN 600V FETs (technology preview material: LMG3410) in half-bridge configuration. This board plugs into the motherboard.
Left middle: 4 more fresh-from-the-FAB LMG3410s

That's a decent lot of sparkling new technology to talk about.

I have enrolled into the BK Precision electronic load RoadTest because I can very well use a programmable load in this series.

No excuses anymore to procrastinate (except maybe that I still have to finish the SPI performance story - a blog series that I started because there was a delay in the FET delivery [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-816a8165-a41f-41e0-951e-8b089258109f/contentimage_5F00_1.png:16:16] )

RE: High Voltage GaN FETs - Part 1: Several 100 Volts

DAB — Fri, 13 May 2016 19:05:00 GMT

Count me in.

I like to see what you are doing and get an update on the latest technology available.

DAB

RE: High Voltage GaN FETs - Part 1: Several 100 Volts

jw0752 — Fri, 13 May 2016 04:23:27 GMT

Hi Jan,

I too have been fascinated by DC to DC conversion and switching power supplies. It has been my dream to be able to actually fix a switching power supply that has failed. It hasn't happened yet but I haven't given up yet either. Every day I learn a little bit more and I am hoping to gain some new insights from your blog on this subject. Thank you for taking the time to include us in your exploration.

John

RE: High Voltage GaN FETs - Part 1: Several 100 Volts

shabaz — Thu, 12 May 2016 23:06:23 GMT

Hi Jan!

Looking forward to following your investigations as it unfolds: )

There was a nice video by the late Jim Williams I was watching yesterday, where he was discussing how he

went about measuring switching regulator residue as he called it, it was quite interesting:

https://www.youtube.com/watch?v=wegvf39IeTU