UcD modules' limits on delivered current.

[beppe61]

Dear Sirs,

I understand that UcD modules come with some sort of current limiting circuits.
Anyone who knows which are the values for the 180 and 400 models?
I am still undecided about which to try.
Also a suggestion for the better voltage rails choice would be very welcome and valuable.

Thank you so much.
Kind regards,

beppe

[beppe61]

In the datasheet I think it is what is mentioned as ACTIVE CURRENT-LIMITER.
Anyway no figures on the Ucd 180 and 400.pdf datasheets.

Kind regards,

beppe

[Yves Smolders]

Download the PDF's from Hypex:

UCD400: Current Limit 20A, stop mode after 40ms

UCD180: 10A stop mode (limit mode available)

[beppe61]

Originally posted by Yves Smolders
Download the PDF's from Hypex:
UCD400: Current Limit 20A, stop mode after 40ms
UCD180: 10A stop mode (limit mode available)

Thanks a lot Sir.
Please excuse my lazy question but I have been overwhelmed by the size and number of replies of the 3Ds on the UcD modules in this forum.
I wonder if somewhere there is something like FAQ pages.
Anyway the current capability of the 400 is very impressive.
I think I will try that one.

Thank you very much again.
Kind regards,

beppe

[Yves Smolders]

It sure is impressive!

It means you have the full potential of the modules (400W) available at 4 ohms, and even further down it's still very good!

I don't have the numbers anymore...

Yes, the 180 and 400 threads are incredible. It contains a lot of information, but it can't be "read" anymore, it's too large.

About rails for the UCD, I'm running the 500VA toroid & HQ power supply from hypex itself, with amazing results on my speakers.

[beppe61]

Originally posted by Yves Smolders
It sure is impressive! It means you have the full potential of the modules (400W) available at 4 ohms, and even further down it's still very good!
I don't have the numbers anymore...
Yes, the 180 and 400 threads are incredible.
It contains a lot of information, but it can't be "read" anymore, it's too large.
About rails for the UCD, I'm running the 500VA toroid & HQ power supply from hypex itself, with amazing results on my speakers.

Thank you sincerely again Sir.
I did not catch which precise model of the two you have.
Nevertheless I wonder how they have measured that 20A figure (i.e. load, ms, etc.).
Anyway, very impressive.
I am extremely curious about class D.
I believe it has the potential to revolutionize the audio market.
And big advantages as well (efficiency, dimension, weight, low heat generation, etc.).

Thank you very much again.
My best wishes,

beppe

[Yves Smolders]

Beppe,

You don't have to "Sir" me, I'm not a knight or such :-)

I have the UCD400AD models, unmodded, running a pair of B&W Nautilus 804 speakers.

[fokker]

Originally posted by Yves Smolders
It means you have the full potential of the modules (400W) available at 4 ohms, and even further down it's still very good!

is it possible that the current going through the mosfet isn't 1 for 1 going through the load? if so, maybe the instataneous power from those modules is much less?

[classd4sure]

fokker you should read the AES paper on the Hypex website on UCD and you'll know the answer to that question.

Cheers

[beppe61]

Originally posted by Yves Smolders
Beppe,
You don't have to "Sir" me, I'm not a knight or such :-)
I have the UCD400AD models, unmodded, running a pair of B&W Nautilus 804 speakers.

All right Mr. Smolders.
I understand that Nautilus speakers are highly transparent ones.
Any defect in the sound should be very evident I think.
Thank you very much for your kind and valuable advice.
Kind regards,

beppe