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Difference between ESR and ESI in Electolytic caps

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Thread Starter

billcrup

Joined Jan 25, 2005
1
I am trying to understand why the output capacitor in a switching regulator must be low ESR, and how that varies from ESI. Can anyone help?
 
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pebe

Joined Oct 11, 2004
626
Originally posted by billcrup@Jan 26 2005, 03:01 AM
I am trying to understand why the output capacitor in a switching regulator must be low ESR, and how that varies from ESI. Can anyone help?
[post=4798]Quoted post[/post]​
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ESR means Equivalant Series Resistance. It is the resistance of the electrolyte and increases the impedance of the capacitor - which is a bad thing.

I have never heard of ESI in connection with electrolytics,
 
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mozikluv

Joined Jan 22, 2004
1,437
hi

if you want your electro cap to give a long service life use low esr type but it does not mean that you can't use electro caps with a considered high esr. :)
 
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