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Old 2nd January 2007, 01:45 AM   #1
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Smile need +/-85V 20A Stabilized ! help

For the quasi IRF amp !

regards
francisco
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Old 2nd January 2007, 09:14 AM   #2
edl is offline edl  Hungary
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Hi,

There is no need for stabilized power supply for that project.

Simply use a transformer/rectifier/capacitor supply.

Regards,
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Old 2nd January 2007, 09:42 AM   #3
Danko is offline Danko  Hungary
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Are there any disadvantages of using a stabilized SMPS for power amplifiers? Or it's just doesn't needed?
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Old 2nd January 2007, 04:16 PM   #4
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i think the best way to stabilize it is using pins 1 and 2 of 3525 conected via optocouplers to +- trackings and given 10 pecent more voltage to keep voltage constant.
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Old 2nd January 2007, 09:10 PM   #5
Eva is offline Eva  Spain
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Quote:
Originally posted by Danko
Are there any disadvantages of using a stabilized SMPS for power amplifiers? Or it's just doesn't needed?
It's usually advantageous to use a regulated SMPS, but it's not a trivial job to produce an "audio-grade" +/-85V 20A SMPS.
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Old 3rd January 2007, 04:34 PM   #6
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Hi,Eva.
some days ago i was having problems with my dc-dc converter 12v to 140v single supply using 3525,4427, 6 pairs of irf3205 .Reading some of your posts,i discovered the problem.
When the voltage reach 140v,the opto coupler put pin 2 to 0volt , and as you said the minimum voltage was 0.5v.The insertion of a resistor solved the pro.
Thanks Eva .
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