One large or many small capacitor

[405man]

I have been looking at linear power supply design and have noticed that many amplifiers now use multiple parallel capacitors where as previously a single large capacitor was used. Apart from the additional PCB required to mount many capacitors are there any disadvantages to this approach. As a quick comparison I have listed the following combinations all of which cost about the same


Type ESR Ripple I Total ESR Total I

10000uF 63V screw 0.018R 13A 0.018R 13A

4 X 10000uF 63V PCB 0.033R 4.4A 0.00825R 17.6A

8 X 4700uF 63V PCB 0.018 4.86A 0.0081R 48.6A

10 X 2200uF 63V PCB 0.15R 2.5A 0.015R 25A


The figures listed are ESR and ripple current.


Which would be the best combination to use to power a 100W amplifier

Stuart

[AndrewT]

I would be tempted to go for max uF/£. That would be 4off 10mF
For comparison what is the price of two 22mF 63V caps? and what is it's ripple capacity?

[Workhorse]

Originally Posted by 405man

8 X 4700uF 63V PCB 0.018 4.86A 0.0081R 48.6A

[Rodeodave]

Many, many threads on this:

paralleling capacitors site:www.diyaudio.com - Google-Suche