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Old 14th August 2010, 03:18 PM   #91
packman is offline packman  Italy
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Quote:
Originally Posted by Cristi View Post
The A1000SMPS can provide 1000W continuous output power, and 1250 peak power with proper cooling. the main voltage can be set to +-60V, and the aux. is +-12V. the GND for the aux. voltage is separated from the main output GND.
i am not familiar with the NCD modules, but as i saw in their description, they need just V+ and V- referenced to GND and +12V referenced to V- ? if so, then the aux. supply GND can be connected to main output V- and +12V aux, will supply the amplifier driver stage.
Hi Cristi, from the newclassd PSU page:

NewClassD PSU Module

Gate Drive Regulated 20 V 1 Amp +/- 1V

Regards
 
Old 16th August 2010, 04:49 AM   #92
Cristi is offline Cristi  Europe
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1A at 20V is the current capability of the power supply from the provided link. the amplifier does not require such current. most of the amplifiers require 12V to 20V at 50-250mA.
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Old 16th August 2010, 05:10 PM   #93
packman is offline packman  Italy
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Quote:
Originally Posted by Cristi View Post
1A at 20V is the current capability of the power supply from the provided link. the amplifier does not require such current. most of the amplifiers require 12V to 20V at 50-250mA.
Sure Cristi, the required power for the gate drive input is less that the one provided from the PSU.
I've found these useful notes too:

NCDX is compatible with existing NewClassD fast recovery power supplies, and has compatible gain, and same input/output connection setup with unbalanced and fully balanced input options. It requires a power supply of + - 58V to give 200 W rms in 8 Ohms, and also a gate drive voltage of ~20V, 200 mA is required.
NCDX will work perfectly with +/- 70V supply rail, giving extra power in 8 Ohms and up to 480 Watts RMS in 4 Ohms.
 
Old 17th August 2010, 08:29 AM   #94
Cristi is offline Cristi  Europe
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Great ! this means that you can use the A1000SMPS to power this amplifier. acctually two modules can be supplied with a single A1000SMPS unit.
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Old 17th August 2010, 05:21 PM   #95
packman is offline packman  Italy
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ok Christi, i'll buy one A1000SMPS, have sent you an email from here. Thanks

Last edited by packman; 17th August 2010 at 05:26 PM.
 
Old 18th August 2010, 11:50 PM   #96
col is offline col  Australia
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Hi Cristi, I would like to try my SMPS250 with a single-ended amp module (24v). You mention earlier in this thread that it is possible with a simple modification. What is the modification I need to do?

cheers,
col.
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Old 25th August 2010, 12:12 PM   #97
andpol is offline andpol  Italy
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Default SMPS500R is working

Hi Cristi

The SMPS500R is arrived and now work well
Many thanks for your reliability and for your commitment on shipment management!

I have only a question about the aux output:
it is regulated?
 
Old 27th August 2010, 12:21 PM   #98
Cristi is offline Cristi  Europe
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Thank you,

the aux. output is not regulated, but the voltage does not change with more than 5-10% from zero to max. load because the aux. winding is tight coupled with the main output winding on the transformer.
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Old 27th August 2010, 01:52 PM   #99
col is offline col  Australia
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Quote:
Originally Posted by Cristi View Post
The actual version of SMPS250 has dual voltage output. but if only one voltage is needed, this can be done with a simple modification.
Hi Cristi - what is the modification?

cheers,
col.
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Old 28th August 2010, 05:43 AM   #100
Cristi is offline Cristi  Europe
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Add one 1KR at min 5W resistor on the negative rail, and use the voltage from the positive rail. the voltage can be adjusted from the small pot. from 25 to 32V.
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