If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Havn’t been here for a while, so I noticed the latest new semiconductor technology isn’t being adopted.
Example 1; Ditch the 10 year old IRF260s ! They is 10 year old technology!! . I know Steve Ward used ithem and then switched to IGBTs because at 20 amp pulses they were better than IRF260s but check out the newest MOSFETS such as the IRFP4227, These are designed specifically for pulsed high amp applications. 50% of the IRF260’s Rdson and optimized pulse applications. Think 50% less power wasted, and now these MOSFETS change the crossover decision versus IGBTs. Unless you are at over 500 Volts and 40amps, MOSFETS are better than IGBTs, with less drive issues. Guys, let's keep up to date. I have bought 10 pieces for $10, free ship from AliExpress.
Example 2 New gate driver ICs can replace GD toroidal transformers in everyone's half bridge/full bridge driver circuits with much better performance. Think matched propagation delays of 5nsec, and selectable dead times, with 6 Amp, dual channel drives. Oh, and 5KV isolation thrown in. This is exactly what many of us need for IGBT and MOSFET gate drivers which matches the need for control of high efficiency dc motors(cars), welders and industrial applications. You think there will be bulbous hand wound triaxial toroids in your electric car powering the 600V IGBTs when an IC can replace them? Ever heard of a company called Texas Instruments? Check out the UCC21222 from TI. Low volume price is $4.00 from Mouser. This is what the “big boys†are using to control MOSFETs and IGBTs with no transformers.(TESLA?), Only issue I can see is that they are only offered in SOIC package which means a PC layout and not a hand job.
If you want to keep up to date, free subscribe to EDN.
PS I was an Electrical design engineer in a past life and now I am an artist using high voltage Jacobs Ladders
Registered Member #11591
Joined: Wed Mar 20 2013, 08:20PM
Location: UK
Posts: 556
If you are buying MOSFETs from AliExpress, you are not getting what it says on the package. And, whilst bootstrap isolated high-side drivers exist, they don't put out nearly as much drive current as a well designed GDT, and are generally are not as robust. Edit: And whilst I have used the UCC21222 and been impressed with the results, Tesla will not use them (alone) to drive MOSFETs or IGBTs with an area the size of my palm. They require much more drive current than my TO-220s.
Registered Member #62305
Joined: Fri May 11 2018, 03:39PM
Location: Germany
Posts: 6
Hello Green Hornet, the UCC21222 is not the best choice for IGBTs. The maximum voltage VDDA-VSSA is only 20V. Driving an IGBT with +15V and -8V is not possible. Additional to the UCC21222 you need a suitable isolated power supply!
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
New Semiconductor Products are Game Changers
