I love the precision of the MTBF...

[legg]

On Sun, 17 Feb 2008 17:19:23 -0800, "Joel Koltner"
<zapwireDASHgroups@yahoo.com> wrote:

It is a little weird, the Irms vs. Isat ratings.

As far as I can tell Coilcraft has decided they'd like some of Pulse's market
share. Too bad their inductors aren't quite as good... although they're close
enough I suppose they figure they'll compete on price.

Everyone and their cousin is manufacturing these things without

reference to AC or pulsed DC circuit operation. With some of the
moulded part core materials, core loss has a considerable contribution
to temperature rise.

RL

 

[Joel Koltner]

It is a little weird, the Irms vs. Isat ratings.

As far as I can tell Coilcraft has decided they'd like some of Pulse's market
share. Too bad their inductors aren't quite as good... although they're close
enough I suppose they figure they'll compete on price.

 

[Joel Koltner]

....on this data sheet: http://www.coilcraft.com/pdfs/lps5030.pdf

Seems like "3 millennia" would have been close enough...

 

[Ryan Weihl]

Joel Koltner wrote:

...on this data sheet: http://www.coilcraft.com/pdfs/lps5030.pdf

Seems like "3 millennia" would have been close enough...

ha, they could have used "days" too and it would not make any
difference


--

 

[Tim Shoppa]

On Feb 12, 1:47 pm, "Joel Koltner" <zapwireDASHgro...@yahoo.com>
wrote:

...on this data sheet:http://www.coilcraft.com/pdfs/lps5030.pdf

Seems like "3 millennia" would have been close enough...

There's 8 digits on a calculator, and you have to WRITE THEM ALL DOWN
or else the answer is WRONG!!!

I ought to write Zippy the Pinhead, except that I cannot capitalize
randomly enough!

Tim.

 

[Fred Bartoli]

Tim Shoppa a écrit :

On Feb 12, 1:47 pm, "Joel Koltner" <zapwireDASHgro...@yahoo.com
wrote:
...on this data sheet:http://www.coilcraft.com/pdfs/lps5030.pdf

Seems like "3 millennia" would have been close enough...

There's 8 digits on a calculator, and you have to WRITE THEM ALL DOWN
or else the answer is WRONG!!!

MTBF is a *mean* time. That's why they've dropped minutes and seconds
which would have been of no significance.


--
Thanks,
Fred.

 

[legg]

On Tue, 12 Feb 2008 10:47:40 -0800, "Joel Koltner"
<zapwireDASHgroups@yahoo.com> wrote:

...on this data sheet: http://www.coilcraft.com/pdfs/lps5030.pdf

Seems like "3 millennia" would have been close enough...

MTBF of fixed magnetic components has never been a significant factor
in the typical electronic system.

Seems rather pointless to have an Irms rating that exceeds Isat in a
power filter choke, though. In effect, the component is designed to
fail.

RL

 

[legg]

On Tue, 12 Feb 2008 19:54:01 -0500, legg <legg@nospam.magma.ca> wrote:

On Tue, 12 Feb 2008 10:47:40 -0800, "Joel Koltner"
zapwireDASHgroups@yahoo.com> wrote:

...on this data sheet: http://www.coilcraft.com/pdfs/lps5030.pdf

Seems like "3 millennia" would have been close enough...



MTBF of fixed magnetic components has never been a significant factor
in the typical electronic system.

Seems rather pointless to have an Irms rating that exceeds Isat in a
power filter choke, though. In effect, the component is designed to
fail.

Changed my mind about this - it could be a tip of the hat at the
possibility of core loss, which is seldom anticipated by smd part data
sheets. Pity they're not documented in this sheet either, though.

RL

 

[vincent.thiernesse]

"Fred Bartoli" <" "> a écrit dans le message de
news:47b23dc5$0$14894$426a74cc@news.free.fr...

Tim Shoppa a écrit :
On Feb 12, 1:47 pm, "Joel Koltner" <zapwireDASHgro...@yahoo.com
wrote:
...on this data sheet:http://www.coilcraft.com/pdfs/lps5030.pdf

Seems like "3 millennia" would have been close enough...

There's 8 digits on a calculator, and you have to WRITE THEM ALL DOWN
or else the answer is WRONG!!!



MTBF is a *mean* time. That's why they've dropped minutes and seconds
which would have been of no significance.

Comme ti es drôle, mon Fredo....incorrigible farceur !!!

Thanks,

Preggo

Vincent