Thanks for the reply in all applications the DC DC converter is used for isolation and followed by linear regulators. In critical stages like dual mixer two stages. Bert In a message dated 8/31/2014 11:12:18 A.M. Eastern Daylight Time, [email protected] writes:
Hoi Bert, On Sun, 31 Aug 2014 07:15:02 -0400 (EDT) Bert Kehren via time-nuts <[email protected]> wrote: > Any opinion or observation on Mean Well's SD series, they are a key > component on most of our projects. I never had the pleasure to measure any of the Mean Well DC/DC converters. Looking at their spec, they seem decent enough. The ripple and load regulation specs are not exactly time-nut class, but not unheard of for this kind of brick, isolating DC/DC converters. Also a nice feature is the CE marking, resp the EMC emission specs, which a lot of cheaper devices do not have. Unfortunately, they do not mention which class of the EN55022 they comply to. It's probably Class B, but not necesarily. [1] What i'm missing is a specification of the switching frequency, that would help to guide the filter needed at the output. But i'd assume it's something in the range of 100kHz-500kHz, definitly less than 1MHz at these power ratings. Such brick converters are usually used as a first stage converter to power a complete system from some industrial or telecom power rail. As such, they are meant to have a second stage regulator infront of the electronics (or electronics that can cope with the ripples and flucutation of the power rails, like slow digital logic). Ie. i recommend to use another, specialized DC/DC converter or LDO infront of your electronics, to keep the power more stable and have less ripple. As for use with an FE-5680A, i guess these DC/DC converters are good enough, as the FE-5680A has its own internal regulator. HTH Attila Kinali [1] A little warning here. The normal way how such devices pass the EMC/EMI tests is by constructing a still realistic circuitry around it, that modifies the devices behaviour enough that any non-compliance is mitigated. Unless you measure these devices with a realistic model of your system, or the system itself, you cannot be sure that the DC/DC converter still passes the EMC regulations. -- 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 -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
