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Old 24th January 2007, 03:06 PM   #1
jaste is offline jaste  Sweden
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Join Date: Dec 2005
Location: Stockholm
Default How many amperes for a parallelled lm4780

Hi! I just bought a big toroid with multiple secondaries, two of them are labeled 24 VAC and 4,9 amperes. Now Im wondering if that is sufficent to drive two lm4780 chips, both in parallelled configuration?
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Old 24th January 2007, 04:31 PM   #2
jaste is offline jaste  Sweden
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Join Date: Dec 2005
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Ok, sorry for posting so fast... I've been doing some research and found that for a 8 ohm load it would be ok but for a 4 ohm load it might be difficult, is that right?
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Old 24th January 2007, 06:00 PM   #3
AndrewT is offline AndrewT  Scotland
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Join Date: Jul 2004
Location: Scottish Borders
some quick numbers.
maximum output power~=VA/1.5=235/1.5=156W.

This transformer will support 150W or 75W+75W or 50W+50W+50W of good quality power if the PSU is scaled accordingly.
regards Andrew T.
Sent from my desktop computer using a keyboard
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