I think there is a new version called PA0367ANLT Yes, soldering this ic is a major issue, I don't have a reflow oven. For me using very little amount of solder paste and a hot air gun works fine.
You're absolutely right, with 12V the test PSU has the best efficiency at 60mA (89%) but then it goes down (86% at 25mA and 81% at 10 mA). For low current designs seems to be better to use 9V or even 5V as input voltage. Am Donnerstag, 21. März 2019 21:48:28 UTC+1 schrieb SWISSNIXIE - Jonathan F.: > > The LT3757 looks quite like a nice ic, i will try it with the transformer > *PA0367A > *from Pulse elctronics, its quite small. Since its only availabe from > digikey, i have to wait until i have an order big enough to order at > digikey :/ > > Probably alot of people are not into new supplies because mostly (like in > any other electronics project) the new and good IC's don't come in SOIC or > DIP anymore, so you need to know how to solder leadless packages.... In a > few other hobby projects i run into the problem that the ic of choice was > only available as BGA... > > One thing about nixie power supplies is usually that the efficiency is > alway given at like 50mA, but usually a normal nixie clock uses way less. > Even 6 IN-18 would only require around 40mA supply. Smaller builds tend to > use 25mA or even 15mA. Nearly every converter is inefficient at low > currents, since the losses are in absoulte values not in percent. "loosing > 5mA" at 50mA would give you give you 90%, but the same design probably also > looses 5mA at 15mA output so that would be way more bad. Alot of people are > fooled by this fact. > > I saw a quite cool design by linear technologies that has around 85% > efficiency at 20mA Ouput, which is enough for a IN-8 clock or so. > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/632c7327-5772-4862-904b-a27811c142d6%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
