low impedance cap series question

phrarod · 18th February 2008, 10:58 PM

I'm looking at either Pansonic FC low impedance series which I know is popular and the United Chemicon LXZ very low impedance series.

Are there options as which may be better?

BWRX · 18th February 2008, 11:47 PM

Depending on the voltage rating and capacitance values you need you may want to have a look at Panasonic FM and UC KZE as well.

phrarod · 18th February 2008, 11:58 PM

Voltages are 680uF 25v and 47uF 50v

poobah · 19th February 2008, 02:01 AM

What is your application?

In many applications, the golden path to low ESR is parallelling caps...

phrarod · 19th February 2008, 02:33 AM

This will be in a dc supply.

poobah · 19th February 2008, 03:00 AM

Linear or switcher?

In smoothing cap apps, it is often a toss up between ESR and ESL as the culprits.

In either case. Long tall skinny caps, as opposed to short squatty ones, are generally lower in both.

In linear apps... paralleling a ceramic or film cap can be far more practical than finding the ideal lytic...

phrarod · 19th February 2008, 03:01 AM

Its a smps based device.

18th February 2008, 10:58 PM	#1
phrarod diyAudio Member Join Date: Aug 2005	low impedance cap series question I'm looking at either Pansonic FC low impedance series which I know is popular and the United Chemicon LXZ very low impedance series. Are there options as which may be better?

18th February 2008, 11:47 PM	#2
BWRX diyAudio Moderator Emeritus Join Date: Jan 2005 Location: Pennsylvania	Depending on the voltage rating and capacitance values you need you may want to have a look at Panasonic FM and UC KZE as well. __________________ Brian

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18th February 2008, 11:58 PM	#3
phrarod diyAudio Member Join Date: Aug 2005	Voltages are 680uF 25v and 47uF 50v

19th February 2008, 02:01 AM	#4
poobah diyAudio Member Join Date: Nov 2005	What is your application? In many applications, the golden path to low ESR is parallelling caps...

19th February 2008, 02:33 AM	#5
phrarod diyAudio Member Join Date: Aug 2005	This will be in a dc supply.

19th February 2008, 03:00 AM	#6
poobah diyAudio Member Join Date: Nov 2005	Linear or switcher? In smoothing cap apps, it is often a toss up between ESR and ESL as the culprits. In either case. Long tall skinny caps, as opposed to short squatty ones, are generally lower in both. In linear apps... paralleling a ceramic or film cap can be far more practical than finding the ideal lytic...

19th February 2008, 03:01 AM	#7
phrarod diyAudio Member Join Date: Aug 2005	Its a smps based device.

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