Hypex SMPS - When Is It Coming? Alternatives?

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#122
According to the datasheet it can spit out 90–100 W consciously when properly cooled. So a decent 25W – 35W PP full class-A must be possible at 8 ohms load. But I doubt if it’s wise to run the mos fets at 100 deg C continuously.

😉
 
#123
According to the datasheet it can spit out 90–100 W consciously when properly cooled. So a decent 25W – 35W PP full class-A must be possible at 8 ohms load.
Click to expand...

Yes, if the amp can work on +/-35 V supply voltage instead of the ideal +/-25 V. And with ideally linear output devices, and with a speaker, whose impedance never drops under 8 ohm. But if we want headroom for non-ideal load and transistors, then power limit is even less.
 
#124
DcibeL said:
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...]
Click to expand...

Of course you can run two ucD180ST with one SMPS, the SMPS can do 90-100W continious. So two UcD180ST with an 1/8th power is 45Wrms only, no problems so far.....

Check the datasheet for all mechanical drawings!
http://www.hypex.nl/docs/smps180.pdf

Jan-Peter
 
#127
Pafi said:
Yes, if the amp can work on +/-35 V supply voltage instead of the ideal +/-25 V. And with ideally linear output devices, and with a speaker, whose impedance never drops under 8 ohm. But if we want headroom for non-ideal load and transistors, then power limit is even less.
Click to expand...

Agree with that, 15 ohm would be a more optimum load then. But the days that that was common are gone. Anyway for optimum power transfer the impedance of the loudspeaker should not deviate much from nominal for a pure class-A amp.

Basically there is no limit to lower the output voltage with a fly-back, provided you limit the current. So it is merely the limit of the adjust pot here me think.

As a fan of pure class-A myself I am now with the UcD modules. They come close to the sound of class-A without the disadvantages.
 
#128
SMPS connectors

Hi Jan Peter!
I've seen that instead of more commonly available spade connectors (Faston) you have decided to use on smsp180 smaller connectors:

1x JST-B5P-VH for main outputs
1x JST-B7B-EHA for standby and aux outputs
1x JST-B3P-VH for AC supply intput
1x 4-pin MOLEX® KK® series for DC protection

Questions/Notes regarding this:

1)
On the datasheet 5-pin and 7-pin names are inverted: J1 is B7B (7-pin) and J2 is B5P (5 pin)

2)
The last one (Molex KK) seems a copy&paste error from UcD datasheet: from the photo in the datasheet, it's the 2-pin version, not the 4-pin used on UcDs.

3)
Is the board already provided with this 4 female connectors and some crimping pins or do we have to look for them ourself?

Thank you very much for your help and great work!

Best Regards

Riccardo
 
#129
Re: SMPS connectors

Grifondoro said:
Hi Jan Peter!
I've seen that instead of more commonly available spade connectors (Faston) you have decided to use on smsp180 smaller connectors:

1x JST-B5P-VH for main outputs
1x JST-B7B-EHA for standby and aux outputs
1x JST-B3P-VH for AC supply intput
1x 4-pin MOLEX® KK® series for DC protection

Questions/Notes regarding this:

1)
On the datasheet 5-pin and 7-pin names are inverted: J1 is B7B (7-pin) and J2 is B5P (5 pin)

2)
The last one (Molex KK) seems a copy&paste error from UcD datasheet: from the photo in the datasheet, it's the 2-pin version, not the 4-pin used on UcDs.

3)
Is the board already provided with this 4 female connectors and some crimping pins or do we have to look for them ourself?

Thank you very much for your help and great work!

Best Regards

Riccardo
Click to expand...

Hi Ricardor,

1) Indeed you are right! We have mixed the J1 with J2, we will change this tomorrow.
2) No this is correct, it's a 2-way Molex KK connector.
3) The SMPS is delivered with a full cable set. One end the JST/Molex connector the other side is open, so you can add a faston or solder it direct to another connector what ever you like.

Regards,

Jan-Peter
 
#130
This afternoon the postman delivered this. Nice work J-P 😉

It comes complete with assembled cables. However in the included datasheet the 2-pin J5 is still labelled as 4-pin MOLEX® KK®.. But that is a minor issue still to be solved by Hypex.

😉
 

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#131
And so it will fit in a nice alu Hammond case. Plenty of room left, even for a 2-channel version. But a total of 6.5 amps for the peaks in the lo bass region is a bit lean to me. So it will finally be 2 mono blocks for me.

Cheers 😉
 

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#132
Pjotr said:
And so it will fit in a nice alu Hammond case. Plenty of room left, even for a 2-channel version. But a total of 6.5 amps for the peaks in the lo bass region is a bit lean to me. So it will finally be 2 mono blocks for me.

Cheers 😉
Click to expand...

Pjotr,

nice configuration!

We didn't thought yet to mount the UcD180 in this way....good idee.

Jan-Peter
 
#133
Thanks J-P,

For this I will replace the alu L-bracket for a piece of 40 mm x 40 mm x 4 mm L-shaped alu to get sufficient heat flow to the case.

A note of CAUTION I forgot:

With this Hammond case there is just 2 mm of clearance between the top of the transformer and the top of the alu case and less than 8 mm of safety clearance for the vertical control PCB. This violates safety requirements. So I will put a 1 mm thick sheet of isolation material (clear etched PCB sheet) for safety on the top piece of the case.

Cheers 😉
 
#134
For those of you who have heard the hypex smps180, what are your sonic evaluations? Is it better in every which way over the mono HG supplies? Any sonic set backs?

How does it compare to coldamps SPS30's in terms of the power it can deliver?

Im having trouble deciding on supplies for a pair of ucd400hg's ive got laying about, that will be built into monoblocks. Hence the questions.
 
#136
Hi dede,

Do you mean for the SMPS180? In that case: Nope! It starts up very gentle by itself.

Just hook up one or two UcD180 to it and you are finished. It has all protection issues build in, including DC output protection for the amps.

And if you like extra ketchup, you can add extra buffer caps at wish.

Cheers
 
#138
I'd love to hear some feedback about the sound qualities of this SMPS coupled with UcD180HG. A comparison with a linear power supply would be even better 🙂

By the way, I have a very base question: aside from connectors and case, is the SMPS180 and a couple of UcD180 all I need to build a amp?
When using a toroidal transformer one had to buy a UcD Supply HG to supply the power to the UcD amps. It is no more needed if I'm using the SMPS180, is it? Sorry for such a noob question 🙂
 
#139
In order to build an amplifier module or a stereo (two channel) amplifier unit, no more building blocks - except mains and input/output connectors - are required, although a volume control is worthwhile for an integrated amp. 😉

The SMPS replaces the combination of toroid and UcD Supply.

Cheers,
Sebastian.
 
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