Switch mode power supplies Myrra series 47000 already found their stable place on the market and they gradually replace classic transformers. Why is it so?
Switch-mode power supplies definitely win in a perhaps the most important requirement of these days - in efficiency (in a whole load range) and in a low no-load consumption (Standby). Similarly also many other factors say in favor of switch-mode power supplies, for example power/ weight ratio, size, simple elimination of a high inrush current, silent operation, minimum stray magnetic field, ...
From these reasons for the majority of applications it´s better and often even cheaper to use an “electronic replacement” of transformer - for example modules series Myrra 47xxx or AC/DC modules Traco Power for higher power ratings.
Maybe it´s worth to question, whether there´s still any reason to use a classic transformer in usual applications with power demands say 1-1000W? Surely yes, for example in application very sensitive to HF radiation (HF receivers, pre-amplifiers,…) but also in applications with a demand for the highest reliability for decades. Transformer is a component which almost doesn´t age and if properly sealed in a resin, then it´s lifetime is extremely long. As a transformer doesn´t contain any semiconductors, capacitors etc, it´s also very resistant to various spikes, overvoltages and noise in a power line...
Power supplies of 47000 series have a very low no-load power consumption - only 200 mW, resp. 300 mW at unregulated types. With the 4000VAC isolation (input/output), they´re ready for a class II – reinforced isolation. With a built-in protection against shortcut and over-temperature, they´re ready for usage in a virtually any device with power demands up to approx. 5-5,4W.
Detailed information will provide you the Myrra 47000 datasheet and the article Save energy and production costs with Myrra 47000 switch-mode power supplies.
In case of interest, please contact us at info@soselectronic.com.
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