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Registered Member #1732
Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112
So I've completed the re-spin, and boards will be on their way shortly.
Angle View
Top
Bottom
I put test points on just about everything I could think of. Hopefully all those test points scare the bugs away! I changed some parts so that the board can be ordered in it's entirety from Digikey, and all but the CPLD can be ordered from Mouser. Also, I fixed some old layout errors, and spread components out so that the board should be a little easier to assemble.
Registered Member #1732
Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112
Boards arrived, and I assembled the first V1.1. It works, of course.
Here are some photos of the assembled board. I tried some new FETs out for the gate drive. They're about half the price of the fairchild FETs used on the UD2. They work fine, but they have a slightly different footprint, so they don't fit perfectly on the board. Also, you might notice that there are a lot of test points on the board. For a typically assembly the number of test points would be far lower (even zero is okay). I have this board assembled for DC input.
Click on the image for full size (36MP)
I ordred 25 of these boards. If you'd like one, let me know.
Registered Member #30656
Joined: Tue Jul 30 2013, 02:40AM
Location: UK
Posts: 208
Looks fantastic!
BTW I got a (rather hacked up) version of your code running my driver, however I ran into noise issues at GDT switching transitions, probably not a big surprise given the FPGA was connected via flying leads!
I'll be doing some more work on my own design over the holiday period, but many thanks for the good starting point, and getting a PLD based driver design out there for people to use.
Registered Member #1732
Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112
I have added a page on my newly restyled website for the UD+.
There is a price list at the bottom of the page. The page also includes a lot of useful information about using the board. Effectively that page is the manual for the board.
PS ... if you want to purchase one of these boards, please contact me via my e-mail (listed at the bottom of the page I linked to).
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UD+ a new Universal Driver (now with Freewheeling)
