When ESR is too low?

televizora

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Join Date: Nov 2016

Posts: 957

Country: Bulgaria
#1

When ESR is too low?

11-26-2016, 02:45 AM

So, what are your thoughts about ESR, capacitance, ripple currents, general filtering of the capacitors? When low ESR is TOO low?
Let's make this topic a small FAQ with competent opinions. There is too much confusion about the ESR.

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japlytic

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Join Date: Oct 2005

Posts: 2085

Country: Australia
#2

11-26-2016, 03:21 AM

Re: When ESR is too low?

In the application notes contained in the Sanken SI-8000 DC-DC converter datasheet, there was a warning against using capacitors with a extremely low ESR, such as OS-CON or tantalum units; using such units can cause an abnormal oscillation, possibly relating to peak currents through extremely low ESR.

My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.
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