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sts9fan  
#1 Posted : Tuesday, November 9, 2010 8:51:07 AM(UTC)
sts9fan

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Hi

I have an old TXPS laying around that I would like to use for another project. Can the regulated section be changed from 9v to 5v? Can it do 5A? I think I remember that you only need to change a resistor but I am having a hard time finding the info. I checked the data sheets of the ST semiconductors but I could not figure it out. Anyway any information would be great.
Thanks
Kris
Russ White  
#2 Posted : Tuesday, November 9, 2010 8:53:09 AM(UTC)
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You could make it to 5V but you will want to calculate the power dissipation.
sts9fan  
#3 Posted : Tuesday, November 9, 2010 9:04:15 AM(UTC)
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So are you saying its a bad idea?
Russ White  
#4 Posted : Tuesday, November 9, 2010 9:06:01 AM(UTC)
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Well unless your voltage drop is quite low, 5A is a lot current.
sts9fan  
#5 Posted : Tuesday, November 9, 2010 9:10:32 AM(UTC)
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Well I really only need ~3A for the squeezebox touch but I was thinking of head room.
Russ White  
#6 Posted : Tuesday, November 9, 2010 9:13:51 AM(UTC)
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What is your voltage going to be after rectification?
sts9fan  
#7 Posted : Tuesday, November 9, 2010 9:15:03 AM(UTC)
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12V
Russ White  
#8 Posted : Tuesday, November 9, 2010 9:47:08 AM(UTC)
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I would suspect that is going to be more than those heat sinks can handle with that kind of drop.
sts9fan  
#9 Posted : Tuesday, November 9, 2010 10:51:47 AM(UTC)
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well it was worth a try. Thanks for the input.
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