Great video. I think also often missed characteristic is dv/dt immunity. It is partially related to gate-drain capacity, and Miller current. But it is a bit more complex. Anyway, in fast switching, especially in H-bridge and other push-pull configurations, dv/dt immunity is very important, and often the limiting factor.
Also the thing limiting GaNs is usually the parasitics. I've had instances of shoot through on a GaN H-bridge because the parasitic inductances cause a voltage spike on the Gate turning on the fet and causing shoot through. Only way to fix it after a point is slowing down switching speed.
This stuff is moving so fast I can't keep up with what I have to work with. Seems like I'm a TO-3 engineer in a BGA world. Thanks for helping keep me up to date. Keep em coming.
I can't express how much you learn me every time, it's amazing! I do really like the way you made this video, simple but greatly use of board, computer and yes it all! I do also still like your usage of the small subscribe logo. I can't decide if your "subscribe, join and so on" speech is great to place in the middle, but it's definitely better there then if you had put it in the start. :-)
Thanks to your explaination I finally understand what the Vgs(th) is. Before I thought of it as a voltage at which some arbitrary current flows, that the manufacturer sepcifies ( like "we consider it open although you can only push 1mA through the channel") . Combined with the Q:I diagram it finally makes sense to me!
BeamFinder Thanks for the great feedback! Although there are a lot of similarities - they really are different. As I go forward with the GaN, I’ll try to cover some of these characteristics. I have another GaN video in a Class D amp coming up very soon! ;)
The other very important that GaN is always ON which is not many video address it in youtube in detail. GaN as normally off can be achieved by cascode GaN with NFET. Also with new design of dedicated GaN drivers which have specific mechanism of gate charge and discharge. So that driving GaN FET is more difficult that standard MOSFET. But there is available GaN and Mosfet in one package which allow driving normally like conventional MOSFET. This maybe you can consider in next video.
Thanks - great feedback! In at least one of my videos I tried to address the enhancement mode versus depletion mode;) I've been demonstrating eGaN FETs which are enhancement mode so off until the gate voltage turns them on. I'll have to make sure I address this with each GaN video;)
Thank you, love your videos. Have not found any information on this so here goes: can you use these Gan fets for a class a amplifier, Noone has talked about this or even mentioned this? Would love hear your input on this. After all they are better in almost all aspects. So my conclusion is that a class a amp would benefit from Gan gets big time.
The EPC devices are often a bare die with solderable pads. The main benefit is that it has lower inductance and resistance for all pins. But it is harder to use it for a home player. There are other good small packages like DirectFET that are more comparable. The packaging do have a lot of effects, and more direct die connections can be used with Si MOSFETs, but often is not the primary bottleneck, so it is not used often. In GaN because of superior performance, poor packaging would limit the performance significantly, even if it is still better than Si MOSFET.
INTERESTING PRESENTATION.HOW DO YOU BIAS GAN FETS AND,WHAT CONFIGURATIONS CAN YOU USE SUCH AS DRAIN FEEDBACK ETC.THIS IS ALL NEW TO ME,DID NOT HAVE THIS WHEN I WENT TO COLLEGE.WHAT ABOUT ESD PROBLEMS?I AM FEELING BETTER NOW BUT,AM STILL HAVING PAIN AND,TIRED.I WAS TOLD IT TAKES ABOUT SIX WEEKS FOR FULL RECOVERY.
Thanks David! I’m glad you are starting to feel better. I did another GaN video before this one that might help explain some of this. They do require more attention to the gate drive. They are made differently than a MOSFET, but they also work very similarly. I would imagine that they are similar to a MOSFET for ESD, but that’s a great question - I’ll have to ask a vendor about that. Glad to hear from you;)
Thanks again, but my brain hurts! I hope I can use some of what I "learned" ... ha ha ha I'm redoing my workroom so lets hope I can start producing more videos and hopefully something others find useful! Happy New Year to you all and lets have MANY GOOD ELECTRONS in your lives!
bgdwiepp Thanks bgdwiepp! I used the 100 V versions because I have another GaN board that I’ll be doing a video on that will be using this part;) You are right though - the higher the voltage the more GaZn shines.
“You just kind of combine these terms...”. Nice try. What are they giving you? Does RUclips have rules about that? Really, really dumb stuff. These things are one of many shots on goal. They paid for your shot.
I’m sorry, i don’t understand your question. If you are asking if the venders pay for me to show their stuff - no, but I wish they did. This is just an expensive time consuming hobby. Sorry you thought it was a dumb video.
Sorry you didn’t like it Simon. There are viewers across all experience levels, and for some they might like a bit more explanation. It’s always a balance that I try to work on.
![Gucci Mane & Sexyy Red - You Don't Love Me [Official Music Video]](http://i.ytimg.com/vi/j7IBqyFKT4c/mqdefault.jpg)
Great video. I think also often missed characteristic is dv/dt immunity. It is partially related to gate-drain capacity, and Miller current. But it is a bit more complex. Anyway, in fast switching, especially in H-bridge and other push-pull configurations, dv/dt immunity is very important, and often the limiting factor.
movax20h Thank you! And thanks for the great feedback!
Also the thing limiting GaNs is usually the parasitics. I've had instances of shoot through on a GaN H-bridge because the parasitic inductances cause a voltage spike on the Gate turning on the fet and causing shoot through. Only way to fix it after a point is slowing down switching speed.
@@jaideep1337 Exactly.
RUclips was invented for blokes like you. What a guy! Thanks for the help :D
Thanks Jake! I appreciate you!
This stuff is moving so fast I can't keep up with what I have to work with. Seems like I'm a TO-3 engineer in a BGA world. Thanks for helping keep me up to date. Keep em coming.
Scott Marshall LOL Thanks Scott!!
Haha that's a great phrase. Gonna steal that.
I can't express how much you learn me every time, it's amazing!
I do really like the way you made this video, simple but greatly use of board, computer and yes it all!
I do also still like your usage of the small subscribe logo. I can't decide if your "subscribe, join and so on" speech is great to place in the middle, but it's definitely better there then if you had put it in the start. :-)
Fried Mule Thank you Fried Mule! I’m glad you liked it;). I always appreciate your feedback!
Really enjoy these videos. Very down to earth approach! Thanks.
Thanks so much! I appreciate you!
I wish youtube wasnt so toxic or id DM you to express gratitude. Subbed and liked. Will definitely check some more stuff out.
I appreciate you Jake! Welcome to the team;)
Woah. Didnt know Hetfield was into electronics. What a guy!
Yes - he loves electronics;) Thanks!
Thanks to your explaination I finally understand what the Vgs(th) is. Before I thought of it as a voltage at which some arbitrary current flows, that the manufacturer sepcifies ( like "we consider it open although you can only push 1mA through the channel") . Combined with the Q:I diagram it finally makes sense to me!
BeamFinder Thanks for the great feedback! Although there are a lot of similarities - they really are different. As I go forward with the GaN, I’ll try to cover some of these characteristics. I have another GaN video in a Class D amp coming up very soon! ;)
Another great video - got it archived!
AmrHollywood Thank you - that’s awesome!!
The other very important that GaN is always ON which is not many video address it in youtube in detail. GaN as normally off can be achieved by cascode GaN with NFET. Also with new design of dedicated GaN drivers which have specific mechanism of gate charge and discharge. So that driving GaN FET is more difficult that standard MOSFET. But there is available GaN and Mosfet in one package which allow driving normally like conventional MOSFET. This maybe you can consider in next video.
Thanks - great feedback! In at least one of my videos I tried to address the enhancement mode versus depletion mode;) I've been demonstrating eGaN FETs which are enhancement mode so off until the gate voltage turns them on. I'll have to make sure I address this with each GaN video;)
Thank you, love your videos.
Have not found any information on this so here goes: can you use these Gan fets for a class a amplifier, Noone has talked about this or even mentioned this? Would love hear your input on this. After all they are better in almost all aspects. So my conclusion is that a class a amp would benefit from Gan gets big time.
Thanks for the great question! I'll do a video and discuss this. It is not a straight forward answer;)
Thanks for a well explained video!
Thank you! I appreciate you!
The EPC devices are often a bare die with solderable pads. The main benefit is that it has lower inductance and resistance for all pins. But it is harder to use it for a home player. There are other good small packages like DirectFET that are more comparable. The packaging do have a lot of effects, and more direct die connections can be used with Si MOSFETs, but often is not the primary bottleneck, so it is not used often. In GaN because of superior performance, poor packaging would limit the performance significantly, even if it is still better than Si MOSFET.
movax20h Great info - thank you! I have used the DirectFET, and they are really cool packages; pun intended;) Thank you for sharing your insight!
@@KissAnalog keep us posted on your GaN stories and experiments ;)
Thanks - I will! I find them really cool - especially with their availability and price coming down:)
INTERESTING PRESENTATION.HOW DO YOU BIAS GAN FETS AND,WHAT CONFIGURATIONS CAN YOU USE SUCH AS DRAIN FEEDBACK ETC.THIS IS ALL NEW TO ME,DID NOT HAVE THIS WHEN I WENT TO COLLEGE.WHAT ABOUT ESD PROBLEMS?I AM FEELING BETTER NOW BUT,AM STILL HAVING PAIN AND,TIRED.I WAS TOLD IT TAKES ABOUT SIX WEEKS FOR FULL RECOVERY.
Thanks David! I’m glad you are starting to feel better. I did another GaN video before this one that might help explain some of this. They do require more attention to the gate drive. They are made differently than a MOSFET, but they also work very similarly. I would imagine that they are similar to a MOSFET for ESD, but that’s a great question - I’ll have to ask a vendor about that. Glad to hear from you;)
Thanks again, but my brain hurts! I hope I can use some of what I "learned" ... ha ha ha
I'm redoing my workroom so lets hope I can start producing more videos and hopefully something others find useful!
Happy New Year to you all and lets have MANY GOOD ELECTRONS in your lives!
Tony Fleming Thanks Tony! I’ll be interested in seeing how your workroom turns out. I still need to work on mine of course;) Happy New Years to you!
@@KissAnalog I have just a day to use for my lab, lets see how far I can take it today!
I’ll look forward to what you do;)
I think Gallium Nitride
Thank you!
should have totally done that comparison with 200V GaN vs 200V Si, and also thrown in price - the GaN is very cheap and so much faster
bgdwiepp Thanks bgdwiepp! I used the 100 V versions because I have another GaN board that I’ll be doing a video on that will be using this part;) You are right though - the higher the voltage the more GaZn shines.
1:32 hate to be a chemistry nazi, but Galium NitrIDE nor NitrATE. very VERY different
Thanks - I gotta keep my GaN straight;) It's like Silcone vs Silcon;)
“You just kind of combine these terms...”. Nice try. What are they giving you? Does RUclips have rules about that? Really, really dumb stuff.
These things are one of many shots on goal. They paid for your shot.
I’m sorry, i don’t understand your question. If you are asking if the venders pay for me to show their stuff - no, but I wish they did. This is just an expensive time consuming hobby. Sorry you thought it was a dumb video.
waffle waffle. just get to the point!
Sorry you didn’t like it Simon. There are viewers across all experience levels, and for some they might like a bit more explanation. It’s always a balance that I try to work on.
@@KissAnalog Hey Eddie, I appreciate your explanation. Thanks for the hard work that you put into this.