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.
Registered Member #105
Joined: Thu Feb 09 2006, 08:54PM
Location:
Posts: 408
I just designed this after a little playing around, and I'm wondering if anyone sees any major flaws in it inductance wise. The output is on the right hand side top and bottom, ground is on the right in the middle, and the + input is on the left hand side. The top mosfets are right side up, with the terminals in the order GDS GDS, while the bottom ones are upside down, and if labeling the terminals from left to right they would read SDG SDG. If the picture was rotated 90 degrees clockwise, the mosfets would be in the same orientation as in the traditional schematic of an H bridge. There will be a film capacitor across the positive rail to ground. Thanks!
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
You should stick at least 1 nice big fat decoupling cap (nice low esr/eskl film) across the +/- rails, and good luck soldering the fets like that (remember, the most important thing about a bridge is that it doesn't blow fets, but the 2nd most important thing is that you can easily replace them when they do blow), but it should work just fine.
Also, it will make you life a heck of a lot easier if you include pads for at the zeners/gate resistors and the wires from the gdt...
Registered Member #105
Joined: Thu Feb 09 2006, 08:54PM
Location:
Posts: 408
As for the zeners- I usually solder the two back to back, bend the leads, and I'll still have enough room on the source and gate pads to do that. And as for soldering like this- thats how my last design was, so I'm not too worried- it just pays to take precautions and make sure you don't blow them in the first place!
Registered Member #146
Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055
Looks pretty good to me. Im pretty sure ive made a bridge with that exact same layout with the traces sneaking under the IGBT pins. I had to eventually insulate the IGBT pins from the board as crud had built up in there causing a short. Easy enough to fix.
Registered Member #505
Joined: Sun Nov 19 2006, 06:42PM
Location: Yorkshire!
Posts: 329
I've used a laminar structure for getting the supply up and down the board with +ve on the top and -ve on the bottom to reduce the inductance. I've then bent the leads of my IGBTs appropriately to contact either the top or the bottom of the board. Still added a film cap for decoupling though.
Registered Member #105
Joined: Thu Feb 09 2006, 08:54PM
Location:
Posts: 408
Just bought some 44N50s so we'll see whats to come of them! Project thread as soon as i get a little time to work on it- Im thinking PLL so i can audio mod later, but I may just do a 74HC with feedback. Votes?
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 TO247 H Bridge
