Hypex SMPS - When Is It Coming? Alternatives?

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#103
With such a design it depends largely on the output caps. Except for the low end. where the regulation becomes active. But you can put extra caps on the output if wished, at least that is what I understand from previous info.

Any datum when they ship J-P?

Cheers 😉
 
#104
Pjotr said:
With such a design it depends largely on the output caps. Except for the low end. where the regulation becomes active. But you can put extra caps on the output if wished, at least that is what I understand from previous info.

Any datum when they ship J-P?

Cheers 😉
Click to expand...

Indeed you can add as many caps as you like.... 😉

In a couple of days we will add the SMPS 180W into our webshop... :angel:

Jan-Peter
 
#106
ackcheng said:
When do you expect the higher power version to come out? 180W is not sufficient for UCD400 or UCD700
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We are working on a more power full desing, something between 500-700W. However I do not expect to have this earlier availble as the end of this year.

But perhaps with the expierence of the SMSP 180W it will go faster......

Regards,

Jan-Peter
 
#109
There are many other possabilites. We have now choose this concept for the fact it's only one switching stage.

Of course the efficiency is not the best with a flyback convertor, but don't forget it's a SMPS for an Audio Amplifier. For other applications whereby there is a constant load it's more important to have the eff. as high as possible.

Jan-Peter
 
#111
Pafi said:
First feature:
"High efficiency"
But efficiency is To Be Determined. 😉

Don't you think about LLC for higher power ones? Then you could specify efficiency proudly!
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Efficiency of the PSU says not much for an audio power amplifier. Efficiency counts most at above 50% maximum load.. Average power of an audio amp is rarely above 10% of maximum output for most music signals. If it is above 80% at max output, I am quite happy.

Idling power is more important.

If you are in the above 1 kW range for PA, yes then it comes more into play.

😉
 
#112
Two other Peters!

don't forget it's a SMPS for an Audio Amplifier
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(More specifically for UcD. For Class AB it could be too weak, and for Class A it is almost unusable.)

I know! I've already told that this is good enough for this purpose, but why do you highlight a feature in first place, when it is 1: not important, 2: not good, 3: not determined?

If it is above 80% at max output, I am quite happy.
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If it is. Last time Jan-Peter said 80%.

If you are in the above 1 kW range for PA, yes then it comes more into play.
Click to expand...

Guess why I said "for higher power ones"!

note: with a good amplifier typical listener doesn't hear hard clipping. Therefore telling that average power of unclipped signal is much smaller than peak is misleading.

Best regards:
Peter Sass
 
#117
Hi Jan,
This SMPS looks very interesting. When used with UcD amp modules, a high power and very light and compact amp can be made.

How safe is it to run two UcD180 modules from a single SMPS180 supply? At CAD$200 each this can become very expensive if I require a supply for each amp module. I guess I can try with one, and if I keep activating the overcurrent protection I will have to purchase another.

I don't see any mounting holes on the aluminum plate so I assume this supply does not require any additional heatsinking?

Thanks for making this product available to us! There is a serious lack of options for SMPS for audio.

[Edit: The image in the webshop is different from that of the preliminary datasheet. The webshop image shows a larger aluminum plate with mounting holes, and that small image is actually 1529x1339 pixels, perhaps it should be resized to a thumbnail...]
 
#118
With some extra storage capacitance you could even run four 180W class-D amplifier channels from a single 180W power supply, provided that:

- You listen to music 😀
- The PSU has good continuous current limiting (no shutdown or hicup mode, just current source behaviour).
- The PSU can actually handle 180W continuous without melting 😉
 
#120
After reading some more, I agree with you Eva. From the datasheet:

An audio amplifier actually draws twice the RMS power from the power supply. At high frequencies the secondary buffer elcaps are capable to provide this peak power. At very low frequencies however the SMPS is responsible for delivering this peak power to the amplifier.
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So if I am to add some storage capacitance at the output of the SMPS I should be okay for high power musical peaks, provided that the storage capacitance is not so large (a ridiculous amount) that it activates the overcurrent protection due to inrush when the amp is turned on.

I think I'll have an order in shortly. I have some UcD180 modules already in the mail so now I get to start shopping for a nice chassis. 😉
 
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