film caps and ripple current

jarthel · 9th October 2006, 02:52 AM

does film caps have "ripple current rating"?

thank you.

wrenchone · 9th October 2006, 04:12 AM

Yes, they do, if they are intended for high current service.

jarthel · 9th October 2006, 04:23 AM

Quote:

Originally posted by wrenchone
Yes, they do, if they are intended for high current service.

say solen metallized polypros. are these suitable for high current applications? The spec I saw never mentioned anything about ripple current.

I also looked at auricap specs and didn't see anything about ripple current.

peranders · 9th October 2006, 04:42 AM

Quote:

Originally posted by jarthel
does film caps have "ripple current rating"?

Most caps don't have it but since do you have a problem with that? This is only important in high freqeuncy/high power applications.

RIFA EVOX and Electronic Concecpt have this parameter. If you search here for "Electronic Concept" you will find the best capacitor in the world.

jarthel · 9th October 2006, 04:46 AM

Quote:

Originally posted by peranders

Most caps don't have it but since do you have a problem with that? This is only important in high freqeuncy/high power applications.

I do not understand what you meant. if I looked into an elcaps datasheet, most datasheet will tell me the ripple current rating for a particular model and value.

peranders · 9th October 2006, 05:00 AM

The films are usually rather small so in order to get large currents you must either have high voltage or high frequency or both.

If you plan to run 100 kHz square wave, 100 volts peak-peak then you will have to look at the power rating also.

If you check for instance an Electronic Concept capacitor you'll see a totally different building style with thick wires.

jarthel · 9th October 2006, 05:21 AM

Quote:

Originally posted by peranders
The films are usually rather small so in order to get large currents you must either have high voltage or high frequency or both.

If you plan to run 100 kHz square wave, 100 volts peak-peak then you will have to look at the power rating also.

If you check for instance an Electronic Concept capacitor you'll see a totally different building style with thick wires.

I get what you meant know. I thought you're talking about riva and EC elcaps.

thank you.

jacco vermeulen · 9th October 2006, 06:22 AM

i'm still waiting for someone to put an Unlytic polyprop as an output cap on one of NPs creations.

lineup · 9th October 2006, 10:47 AM

Quote:

Originally posted by jarthel
does film caps have "ripple current rating"?

thank you.

Film caps normally has got problem with any currents.
Because they are only transfering very small currents
into for example 10 kohm resistors.

Instead of generally asking
you might as well tell us what construction you have in mind.
I am sure it is something interesting!

So we might be to try and quickly give a good answer to your stuff.

If not, I am afraid we may go on here for a couple of weeks
until somebody, by accident, happens to give an answer
that might suit your amplifier or mp3-player circuit.

lineup

cant give a better advice, right now

jarthel · 9th October 2006, 12:33 PM

bypass caps in on the output of a linear regulator. the regulator is supplying 2.5+A to the connected circuit.

9th October 2006, 02:52 AM	#1
jarthel diyAudio Member Join Date: Jan 2002 Location: somewhere in Australia	film caps and ripple current does film caps have "ripple current rating"? thank you.

9th October 2006, 05:00 AM	#6
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	The films are usually rather small so in order to get large currents you must either have high voltage or high frequency or both. If you plan to run 100 kHz square wave, 100 volts peak-peak then you will have to look at the power rating also. If you check for instance an Electronic Concept capacitor you'll see a totally different building style with thick wires. __________________ /Per-Anders (my first name) or P-A as my friends call me

9th October 2006, 06:22 AM	#8
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	i'm still waiting for someone to put an Unlytic polyprop as an output cap on one of NPs creations. __________________ Looks like Sponge Bob has killed another thread.

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9th October 2006, 04:12 AM	#2
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	Yes, they do, if they are intended for high current service.

9th October 2006, 12:33 PM	#10
jarthel diyAudio Member Join Date: Jan 2002 Location: somewhere in Australia	bypass caps in on the output of a linear regulator. the regulator is supplying 2.5+A to the connected circuit.

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