Re: [uCsimm] Inductors' Issue of Switching Power Supply

From: Tom Walsh (tom@cyberiansoftware.com)
Date: Fri Mar 31 2000 - 01:25:34 EST


Xinhua Rong wrote:

> Hi all,
>
> I am quite new to switching power supply design. I found in the recommended application diagram of MAX series there is one 100uH inductor. I wonder there is any requirement about this component. My current consideration is: big enough current, low loss (high efficiency), high frequency (how high? several MHz?).
>
> If I have to homebrew it, what should I do? Such as, how many turns on Amidon FT-50-47 toroid? Thank you for your help!
>
> Xinhua Rong
> 6cr@263.net
> Department of Computer Science
> Univ. of Sci. & Tech. of China
> Hefei, Anhui, 230027
> China
>
> This message resent by the ucsimm@uclinux.com list server http://www.uClinux.com/

On the subject of Torroidal cores, does anyone know the answer to this? Isn't it possible to increase the inductance by stacking cores and using the same number of turns? Effectively doubling the inductance?

TomW

--
Tom Walsh - WN3L - Embedded Systems Consultant
'www.openhardware.net', 'www.cyberiansoftware.com'
"Windows? No thanks, I have work to do..."

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