got a design that needs choking?
? ... links? ... pictures? ... schemetics? ... back of a napkin?
It helps to know if you need to add chokes ...
? ... links? ... pictures? ... schemetics? ... back of a napkin?
It helps to know if you need to add chokes ...
Re: got a design that needs choking?
it's for a step-down voltage regulator (they call it switchers in national.com) and a choke (or inductor is required).
http://www.national.com/images/pf/LM2678/10088603.pdf
FastEddy said:
it's for a step-down voltage regulator (they call it switchers in national.com) and a choke (or inductor is required).
http://www.national.com/images/pf/LM2678/10088603.pdf
Jarthel,
Looking at the inductors at the Epcos website, I'd say you are on the right track. Especially if these are surface mount. The really cool thing about surface mount devices is that no holes need be drilled. Same thing for the SimpleSwitcher chip, and the diode, and the two caps.
In selecting the right inductor, look at the DC Amps rating to see if it can handle the required current, as I remember was 2.55A. Other than that, you are well on your way to doing your first switching regulator successfully.
Steve
Looking at the inductors at the Epcos website, I'd say you are on the right track. Especially if these are surface mount. The really cool thing about surface mount devices is that no holes need be drilled. Same thing for the SimpleSwitcher chip, and the diode, and the two caps.
In selecting the right inductor, look at the DC Amps rating to see if it can handle the required current, as I remember was 2.55A. Other than that, you are well on your way to doing your first switching regulator successfully.
Steve
Steve:
"Looking at the inductors at the Epcos website, I'd say you are on the right track.."
Hello Steve, Jarthel,
Epcos has nice cores with gap, but You had to calculate and wind it yourself.
The smd´s they offer are only filter chokes!
Jarthel,
better You try to get the parts recommended in the datasheet.
http://www.coilcraft.com
Regards
Heinz!
"Looking at the inductors at the Epcos website, I'd say you are on the right track.."
Hello Steve, Jarthel,
Epcos has nice cores with gap, but You had to calculate and wind it yourself.
The smd´s they offer are only filter chokes!
Jarthel,
better You try to get the parts recommended in the datasheet.
http://www.coilcraft.com
Regards
Heinz!
of interest to all ...
power supply designers ... if you ever wish to see your work in production:
http://www.elecdesign.com/Articles/ArticleID/13109/13109.html
( resource: http://powerint.com/greenroom/index.html )
power supply designers ... if you ever wish to see your work in production:
http://www.elecdesign.com/Articles/ArticleID/13109/13109.html
( resource: http://powerint.com/greenroom/index.html )
powerbecker said:
I should'a looked closer at the website.
I would concur with Heinz. I have used several of Coilcraft's smt coils, with good results. However, Heinz, I think Jartherl was looking at Epcos's products because they are available locally (AU).Steve:
"..I think Jartherl was looking at Epcos's products because they are available locally (AU)."
Ah, yes, this one:
http://www.pulseeng.com
Look to "distributors"- Asia !
Regards
Heinz!
"..I think Jartherl was looking at Epcos's products because they are available locally (AU)."
Ah, yes, this one:
http://www.pulseeng.com
Look to "distributors"- Asia !
Regards
Heinz!
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