50A DC-DC converters *_*
Added 2018-04-04 10:38:25 +0000 UTChttps://power.murata.com/data/power/okr-t50-w12.pdf
What do you think about the pinout on page 9? What exactly is pin J13 aka Vin- connected to?
Comments
My guess, it's connected to PGND. EDIT: Nope, it's mislabeled on the data sheet! It makes more sense that there are two Vin pins, given the current this thing can source.
Rick Mann
2018-04-04 22:09:48 +0000 UTCA few Lasorbs are already purchased! In this first version I have just added an RC filter to somewhat increase the rise time and the lowest voltage TVS (2.5V I think) to discharge gross overvoltages that Lasorb might not detect?
Marco Reps
2018-04-04 14:17:57 +0000 UTCMay I suggest some form of soft start and a crowbar circuit. I should have sent you a Lasorb in your care package, but forgot. :( If you can get decent modulation built into your high current laser driver, I would love to buy them from you.
2018-04-04 14:09:14 +0000 UTCNaturally one would assume Vin- to be GND. But then there are PGND pins too? In the drawing on left of page 9 it looks like both pins J12 and J13 are connected to the same polygon. But on page 12 they are clearly shown as separate pins. Turns out they are connected to the same polygon after all: <a href="https://imgur.com/a/vfD5H" rel="nofollow noopener" target="_blank">https://imgur.com/a/vfD5H</a>
Marco Reps
2018-04-04 11:42:11 +0000 UTCWild guessing from a noob about J13 / Vin-: Maybe just the main input ground connection? Datasheet says something about "open collector"... could that mean output ground is somehow switched?
Stephan
2018-04-04 11:34:55 +0000 UTCmein gott
Jonáš Gruska
2018-04-04 11:04:27 +0000 UTCExplosions or even current slopes for rise-/fall-time: >0.12 A/μs are very undesirable for this laser and I'll try hard to avoid such things :)
Marco Reps
2018-04-04 10:55:42 +0000 UTC... Or even a big one if connect couple of converters in parallel.
Volodymyr Babchuk
2018-04-04 10:55:33 +0000 UTCHmmm.... I think you can make a small welder with these.
Volodymyr Babchuk
2018-04-04 10:54:59 +0000 UTCPlaning a load test (with exploding resistsors)?
Stephan
2018-04-04 10:50:10 +0000 UTC
