In Reply to: The problem with large capacitors posted by JLH on March 8, 2007 at 05:00:00:
It's not obvious to me why a large cap cannot deliver energy to the load as quickly as a small cap. A large cap has more stored energy than a small cap - why would it not be able to deliver more energy (current) to the load at the same speed as a small cap?I agree that a larger cap will take more time to charge (draw current for a longer period of time), but it also will take more time to discharge than a smaller cap. That means, I contend, the the effective output impedance of the power supply at a given frequency decreases with increasing capacitance (of the last cap). Isn't that a good thing? Woudn't you want a power supply with the lowest possible output impedance?
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- I gota think about this ... - mikeyb 06:58:43 03/08/07 (9)
- Something to think about ... - danlaudionut 17:16:35 03/08/07 (6)
- Re: Something to think about ... - rdf 10:50:04 03/09/07 (1)
- Re: Something to think about ... - danlaudionut 15:15:59 03/09/07 (0)
- I don't buy it. - arend-jan 05:44:28 03/09/07 (3)
- Re: I don't buy it. - danlaudionut 06:09:21 03/09/07 (2)
- Re: I don't buy it. - arend-jan 14:05:39 03/09/07 (1)
- Re: I don't buy it. - danlaudionut 15:32:01 03/09/07 (0)
- ..... think Dynamic, not Static - drlowmu 07:28:42 03/08/07 (1)
- Huh? - mikeyb 10:06:03 03/08/07 (0)