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Old 23rd April 2005, 12:33 PM   #1
dhole is offline dhole  United Kingdom
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Default Capacitor esl

Hi there

I am reserching some parts for an aleph 5. I am sourcing the capacitors and I know I need some low esl types. I presume this is the rating generaly in milliamps.What sort of rating is ideal ? I have tried to find out a little more about the specification but dont quite understand.could someone explain it to me or advise on a good place to read up on these things.
regards
dave
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Old 23rd April 2005, 02:18 PM   #2
AndrewT is offline AndrewT  Scotland
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Hi,
I think you are after low ESR (equivalent series resistance) caps.
Some are advertised as such. Some high quality ones achieve lesr by design. Compare numbers in the specs.
A set of parallel capacitors will have a lower esr than a larger single cap of equivalent quality and probably cost less.
I have seen PSU's both commercial and DIY that parallel upto 25 caps for a single rail supply. This can only be for esr reasons. it certainly is not compact & at this level of duplication not cheaper either.
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