Is my L25D board connected correctly - diyAudio
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Old 28th December 2012, 10:39 AM   #1
elukasz is offline elukasz  Australia
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Default Is my L25D board connected correctly

I am trying to build a power amplifier based on L25D. L25D has a blue led installed. I believe this led is on when amplifier works. My led is off all the time. Can please someone help? Am I missing something? Did I connect this board correctly to the power supply. Power supply is 70V DC 500W.

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Old 28th December 2012, 11:08 AM   #2
4real is offline 4real  Netherlands
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I don't think this wil work... You'd need a dual voltage power supply, 70-0-70V, and it looks like you have a single 70V supply. But I'm not sure, maybe you can wire the thing to make it work, it seems to have three seperate outputs.. Maybee there is somthing in the manual of the PSU about that?
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Old 28th December 2012, 05:00 PM   #3
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Yes you need an other power supply.

This won't fly

Peter
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Old 29th December 2012, 01:22 AM   #4
elukasz is offline elukasz  Australia
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I checked with supplier of the power supply. He says "This's not a dual-voltage power supply, just single 0-68V power". I need a different power supply.

Thank you so much for your help.

Lucas
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Old 29th December 2012, 09:33 PM   #5
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Quote:
Originally Posted by elukasz View Post
I checked with supplier of the power supply. He says "This's not a dual-voltage power supply, just single 0-68V power". I need a different power supply.

Thank you so much for your help.

Lucas
If you have two of those SMPS it would work...
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Old 30th December 2012, 08:11 AM   #6
elukasz is offline elukasz  Australia
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Quote:
If you have two of those SMPS it would work...
It would give 68v...And 68v again...And 0. But if I understand correctly how L25D works I need -68v, 0,+68v (or -70v, 0,+70v which is recommended voltage)
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Old 30th December 2012, 09:44 AM   #7
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You may have damaged the amp by just connecting to a single supply. See page 15 of the IRS2092 datasheet
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