La meilleure explication, sur le Fonctionnement DPS-500 / UR
, a été fourni par Stefania sur DiyAudio (en anglais) dit effectivement droit Pinnocchio mais «UR» ne est pas exactement non regulated.
il suffit de voir que la tension de sortie, ne varie pas avec la tension alternative d'entrée. (varie très peu, que si le changement est lent), il est évident que cela ne devrait pas varier en fonction de la vitesse (tels que le bruit), et d'offrir une excellente immunité aux pics sur la ligne AC.
-----------Primary differences between / S - / UR
The "S" version, is fully regulated by the owner synchronized analog power regulator stages, with dual feedback, and offers top performance as noise, and speed of response. if used in audio power amplifier is also capable of maintaining the voltage perfectly balanced between the two rail vcc, during the current demands, we know well be unbalanced. this is an additional benefit for an audio amplifier.
The "UR" is like an unregulated smps but with two new features that go well in the case of audio amplifiers.
1) the output voltage is independent of the ac line voltage
, so we can adjust 62V for example, and see that they are very stable.
2) the output voltage is dependent from the current request
, (as in the case of traditional unregulate smps), but with a percentage of fast regulation
. we have set this value to about 30%. So we have:
A smps very clean (this also uses a two feedback loop) as opposed to a traditional unregulated.
A high ratio of power / size / heat
A well-fixed output voltage.
For me. Said the pros and cons, it is not easy,maybe is "condition" dependant. I think this version can be well accepted, in place of a large toroidal with big caps.
Out doubt, the "S" version, is "for us" in terms of measurements, we can not imagine better.