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Old 14th May 2007, 10:54 AM   #1
ashley_kitty is offline ashley_kitty  Singapore
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Join Date: May 2007
Default Linear PS help

hi guys,

i need some help with making a power supply for my 5.1 speakers.

i have to convert 240VAC to 2 outputs : 14.4VDc (125Watts) and 13.5VDc (35Watts) for my amplifiers.

So i have decided to use the a Zener voltage regulator to obtain the output.

I've read the pdf for LM431. but don't quite know if it is possible to use it. Any suggestions.?

thanks.your help is appericated.
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Old 15th May 2007, 11:45 PM   #2
pjpoes is offline pjpoes  United States
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Location: New York
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Not sure what you are looking for, but how much current do these amps need. Those voltages are pretty low so I don't imagine it puts out a lot of power. Can you give us more details about what it is you are powering and what the power supply is for?
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Old 16th May 2007, 12:00 AM   #3
paulb is offline paulb  Canada
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Join Date: Jun 2001
Location: Calgary
"14.4VDc (125Watts) and 13.5VDc (35Watts)"
You need far more current than a zener or LM431 regulator can provide. Something like this would be appropriate:
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