@abdullahkahraman Dead-bug soldering of a QFN16-4mm is easy, but a QFN16-3mm is not so easy. Also, though I do have a few QFN16-3mm parts deadbug soldered to DIP, the wires themselves pick up too much noise, so I need the contacts coplanar i.e. PCB etched.
@abdullahkahraman Well, either pro soldering skills, or the nice USB microscope I use. I'm hardly pro at soldering, but I manage.
@abdullahkahraman Not just open to air - I get the feeling that their non-coplanar nature is the culprit... If they were coplanar (I have one little board with that footprint) then at a particular angle, the common mode noise pretty much disappears.
This guy is just putting unnecessary constraints on his question, he should be seriously relooking at his power supply design instead:
I have a circuit that draws a maximum on 1 amp @ 11v. Its an ATmega328P running PwM through some Mosefts to run some LED DRLs (Daytime Running Lights).
I want to prevent the situation where, during the engine starting, the LED rings flicker as the voltage drops below 11v on starter motor crank. ...
@abdullahkahraman Only for high frequency signals: At lower frequencies, the bond wire lengths are too short for coplanarity to matter, I believe.
The anti-crank guy wants simplicity in his design, yet he wants relatively non-simple functionality that others have designed "massively over-complicated" circuits for. Oh, gosh! If the world found out how simple things could be, the dedicated IC designers would have to shut shop!
I can sense a massive attack of curmudgeonliness coming upon me. Perhaps I should shave what little beard has appeared on my chin in the last few days.
@abdullahkahraman I'm looking at this product of yours: ahsaelektronik.net/alisveris/our-fab/… ... So what would it take to create a 20 to 200 Volt DC, 500 Watt, adjustable (preferably microcontroller controllable) SMPS module? Input being 220 VAC, and switching frequency being a minimum of 150 KHz. Fixed max-current limiting would be a given, I suppose.
@abdullahkahraman Well, keep it in mind for when you have time - There's a market for the voltage and power range I mentioned: Basically ultrasonic lab equipment. From 100 Watts to 500 max. Probably more in the 100 Watt segment.
@abdullahkahraman Hmm, do they have any 20-200VDC, controllable, 100W+ supply?
@abdullahkahraman Yes. Current can go from 500 mA to 2 Amps depending on the Langevin transducer used.
@abdullahkahraman That one is both way more powerful than is needed in labs, and way more expensive. Power supply price shoots up non-linearly with power. A 200 Watt version will often be less than one third the price of a 500 Watt one.
@abdullahkahraman What I would want most, is that it can be voltage controlled, current limited, as well as (and this is the problem part) output power controlled. See, a non-linear load with a variable reactance is problematic to control through V and I alone.
@abdullahkahraman Nahh, it's not that they have specific technology or techniques that you do not have access to. They just have the perceived "German Engineering" tag. No doubt they're meticulous and give great results, but meticulousness is achievable in any geography if the inclination and funding are there.