Attila Any opinion or observation on Mean Well's SD series, they are a key component on most of our projects. Bert Kehren In a message dated 8/31/2014 6:51:13 A.M. Eastern Daylight Time, att...@kinali.ch writes:
On Sat, 30 Aug 2014 01:58:40 +0000 Mark Sims <hol...@hotmail.com> wrote: > Frankly, anybody that builds up a Simple Switcher type converter > from scratch is more than a little nuts and/or awfully lonely. > You can buy small, adjustable pre-built boards (buck or boost configs) > off of Ebay for as little as a dollar each... including shipping from > Old Cathay. I usually buy them 10 or 20 at a time. I slightly disagree here. There are half a dozen parameters that one has to design for when building a DC/DC converter. Simply using one badly specified converter bought of ebay is not going to work unless your requirements are very docile. There is a reason why most electronics devices have a custom build DC/DC converter onboard instead of using one of the available modules (and it's not only money), or that there are companies who have specilized in designing custom DC/DC converters for other electronic design houses to use. As for time-nuts, probably the most important factor in a DC/DC converter is the output voltage/current ripple and its spectrum. Closely followed by magnetic and electrical fields around the converter. Unfortunately, these depend quite a bit on things that are neither specified nor can be easily measured: cleannes of layout and quality of components. Ie whether you use a $0.01 or a $0.05 ceramic capacitor can make the difference whether you have high frequency components (a couple MHz) in the output ripple. Also, i would not dare to change the DC/DC converter of a device unless i know exactly what happens downstream and how the whole system was designed. Especially in bigger, complex devices, there is a strange interdependence between power supply behaviour and consumer behaviour. Attila Kinali -- I pity people who can't find laughter or at least some bit of amusement in the little doings of the day. I believe I could find something ridiculous even in the saddest moment, if necessary. It has nothing to do with being superficial. It's a matter of joy in life. -- Sophie Scholl _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.