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DIY Purifi Amp builds

Kemp

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Finished the simplified circuit, parts list is the same with the exception of the 4N35 optocouplers and sockets plus proto boards. This replaces the 4 channel relay board. Both methods work well so It’s just a matter of preference. I have not had any problems with either one but proceed at your own risk. Will show a picture of the new version which is a little less cluttered, I used two separate proto boards to split up the two functions SMPS standby and LED amp enable. So now need to set back and enjoy. Thanks again for all the help, at this time it is one of my favorite amps.
JimM


I am planning for multichannel amp with Purifi and NC122MP modules. I‘m hoping to use 5V from standby SMPS on NC122 module to turn on 1200A400 SMPS. Would you change any of the circuit here, I mean change any of resistance values for using 5 V supply.
Thanks
 

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MicroAudio

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SMPS630-G

•Unregulated SMPS.
•Selectable input voltage range (110 VAC / 240 VAC).
•Multiple output voltage range (+-40 VDC ~ +-95 VDC). Single or dual. NOTE-1
•Standby switch input eliminates the need for mechanical switches.
•Onboard standby power supply with two outputs (+12VDC & +3.3VDC).
•Amplifier enable output (OPTO Isolated).
•DC Error input.
•Regulated AUX output +-5 VDC ~ +-18 VDC.
•IDC connector can select regulated or unregulated AUX voltage via jumpers.
•Bootstrap VDR supply output +12VDC ~ +18VDC (Completely isolated output) should be tied to –HV in class-d amplifier applications.
•AC-Line loss detection

Coming soon.
 

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wineds

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SMPS630-G

•Unregulated SMPS.
•Selectable input voltage range (110 VAC / 240 VAC).
•Multiple output voltage range (+-40 VDC ~ +-95 VDC). Single or dual. NOTE-1
•Standby switch input eliminates the need for mechanical switches.
•Onboard standby power supply with two outputs (+12VDC & +3.3VDC).
•Amplifier enable output (OPTO Isolated).
•DC Error input.
•Regulated AUX output +-5 VDC ~ +-18 VDC.
•IDC connector can select regulated or unregulated AUX voltage via jumpers.
•Bootstrap VDR supply output +12VDC ~ +18VDC (Completely isolated output) should be tied to –HV in class-d amplifier applications.
•AC-Line loss detection

Coming soon.

Is this from purifi?
 

boXem

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SMPS630-G

•Unregulated SMPS.
•Selectable input voltage range (110 VAC / 240 VAC).
•Multiple output voltage range (+-40 VDC ~ +-95 VDC). Single or dual. NOTE-1
•Standby switch input eliminates the need for mechanical switches.
•Onboard standby power supply with two outputs (+12VDC & +3.3VDC).
•Amplifier enable output (OPTO Isolated).
•DC Error input.
•Regulated AUX output +-5 VDC ~ +-18 VDC.
•IDC connector can select regulated or unregulated AUX voltage via jumpers.
•Bootstrap VDR supply output +12VDC ~ +18VDC (Completely isolated output) should be tied to –HV in class-d amplifier applications.
•AC-Line loss detection

Coming soon.
Safety certifications?
 

MicroAudio

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Safety certifications?

Pending..

But

All inductors are 5KV isolation tested, manufactured at certified factory.
3mm Air gap between primary and secondary.
1mm Air gap on PCB where necessary.

Make sure you will never get a shock unless you put your hands in the wrong place for some reason.

Hope that helps
 

boXem

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Pending..

But

All inductors are 5KV isolation tested, manufactured at certified factory.
3mm Air gap between primary and secondary.
1mm Air gap on PCB where necessary.

Make sure you will never get a shock unless you put your hands in the wrong place for some reason.

Hope that helps
Good to hear that you are working on certifications :). Would you mind disclosing which ones?

What about
- maximum power @ 20Hz-20kHz?
- over current protection?
- number of quadrants?

Sorry to look like being inquisitive, it's good to see a new product on the market, but I like to understand how it's positioned compared to the competition. It would be good if you could provide a datasheet.
 

maty

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Welcome here,

The important question is what two SMP630-G do better than a Hypex SMPS1200A400.

What big electrolytic capacitors are used? Hopefully much better than those used by Hypex.
 

maty

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Optimized

MicroAudio-Cresnet-SMPS630-G-with-more-caps.jpg


https://www.diyaudio.com/forums/vendor-s-bazaar/281413-audio-smps-units-sale-post6225188.html

[ Yes, it is with the below-added features

* Standby switch input eliminates the need for mechanical switches.
* Onboard standby power supply with two outputs (+12VDC & +3.3VDC).
* Amplifier enable output (OPTO Isolated).
* DC Error input.
* AUX1 Unregulated output +-24 VDC (Via IDC Connector)
* AUX2 Regulated output +-5VDC to+-18VDC
* IDC connector can select regulated or unregulated AUX voltage via jumpers.
* Bootstrap VDR supply output +12VDC ~ +18VDC (Completely isolated output).
* Accepts 20,000uF extra capacitance per rail. ]
 
Last edited:

maty

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Last edited:

MicroAudio

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Good to hear that you are working on certifications :). Would you mind disclosing which ones?

What about
- maximum power @ 20Hz-20kHz?
- over current protection?
- number of quadrants?

Sorry to look like being inquisitive, it's good to see a new product on the market, but I like to understand how it's positioned compared to the competition. It would be good if you could provide a datasheet.

Not at all, you are welcomed, I will send you a PM so I can email you the datasheet as it is not complete yet.

The maximum power is 600W @ 20Hz.

Over-current protection is there and it is mandatory into every SMPS. For the SMPS630-G overcurrent trip point is set at 14A.

I am afraid that I don't understand what do you mean by ( number of quadrants?).

Certificates are:-

Safety test (Standard: IEC/EN 62368-1) and EMC test (Standard: IEC/EN 55032).

Thank you
 
Last edited:

MicroAudio

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Welcome here,

The important question is what two SMP630-G do better than a Hypex SMPS1200A400.

What big electrolytic capacitors are used? Hopefully much better than those used by Hypex.

This is a really difficult question to answer, but SMPS630-G offers more options, but not a synchronous rectifier at the output.

But for the capacitors, I only use it from well-known brands.

Also, as the SMPS630-G is an unregulated SMPS, extra capacitance MUST be used at the output to prevent Power Supply Pumping, a minimum value of 6800uF per rail is recommended.

Thanks
 

maty

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Before I snuck in. I confused 80V with 80 ºC. PDF -> 105 ºC.
 
OP
J

JimB

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SMPS630-G

•Unregulated SMPS.
•Selectable input voltage range (110 VAC / 240 VAC).
•Multiple output voltage range (+-40 VDC ~ +-95 VDC). Single or dual. NOTE-1
•Standby switch input eliminates the need for mechanical switches.
•Onboard standby power supply with two outputs (+12VDC & +3.3VDC).
•Amplifier enable output (OPTO Isolated).
•DC Error input.
•Regulated AUX output +-5 VDC ~ +-18 VDC.
•IDC connector can select regulated or unregulated AUX voltage via jumpers.
•Bootstrap VDR supply output +12VDC ~ +18VDC (Completely isolated output) should be tied to –HV in class-d amplifier applications.
•AC-Line loss detection

Coming soon.
Very interesting, but as already suggested, really wants to be in its own, separate thread. @Thomas savage ?
 

Thomas savage

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SMPS630-G

•Unregulated SMPS.
•Selectable input voltage range (110 VAC / 240 VAC).
•Multiple output voltage range (+-40 VDC ~ +-95 VDC). Single or dual. NOTE-1
•Standby switch input eliminates the need for mechanical switches.
•Onboard standby power supply with two outputs (+12VDC & +3.3VDC).
•Amplifier enable output (OPTO Isolated).
•DC Error input.
•Regulated AUX output +-5 VDC ~ +-18 VDC.
•IDC connector can select regulated or unregulated AUX voltage via jumpers.
•Bootstrap VDR supply output +12VDC ~ +18VDC (Completely isolated output) should be tied to –HV in class-d amplifier applications.
•AC-Line loss detection

Coming soon.
We do have a area for commercial entities to promote their products.

https://www.audiosciencereview.com/forum/index.php?forums/desperate-dealers-forum.37/

You can start a new thread here .
 
OP
J

JimB

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I would like to apologies for everyone, I didn't mean to disturb this thread in any way.

Will make new thread later.

Thanks
No worries! I think it was great to hear of it here, but then go to your new thread to have more discussion and details.
 

Matias

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FYI Purifi is working on new amp modules with higher power and power supplies (source: this month's Audioxpress magazine Purifi's factory tour article).
 
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