[sdiy] Typical ESR of different capacitors
harrybissell at wowway.com
Wed Sep 1 16:16:09 CEST 2010
take a look at low-esr.com for some info...
(I took a brief look, maybe some good stuff there...)
----- Original Message -----
From: Antti Huovilainen <antti.huovilainen at iki.fi>
To: Harry Bissell <harrybissell at wowway.com>
Cc: synth-diy at dropmix.xs4all.nl
Sent: Wed, 01 Sep 2010 09:59:29 -0400 (EDT)
Subject: Re: [sdiy] Typical ESR of different capacitors
On Wed, 1 Sep 2010, Harry Bissell wrote:
> You could safely say that the electrolytic would have the highest ESR, the
> tantalum next, and the ceramic is ~probably~ the lowest.
Yes, but what are the ballpark figures? If a design requires max 1 ohm
ESR, am I safe using a random tantalum for example?
Knowing the relative order of caps isn't much use when a blind guess could
easily be an order of magnitude wrong in either direction (some LDO
regulators also require high enough ESR to avoid instability).
On a related note, how does dissipation factor tie into ESR? Is it an
entirely separate mechanism or can I deduce the approximate ESR of a cap
from the DF (within caps of the same type obviously)?
"No boom today. Boom tomorrow. There's always a boom tomorrow"
-- Lt. Cmdr. Ivanova
Harry Bissell & Nora Abdullah 4eva
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