Re: [SI-LIST] : Bulk Caps -> Inductor? -> Plane

About this list Date view Thread view Subject view Author view

From: Silvio ORSI ([email protected])
Date: Fri Apr 14 2000 - 08:33:06 PDT

What worries me about using bulk capacitors with different capacitance
in parallel as in the picture you sent is well described in the following
(look expecially picture 5 on page 3)

I hope this helps!

On Tue, 11 Apr 2000, mjs wrote:

> I am not sure if the list accepts attachments, but here goes.
> If the attachment is stripped by the listserve, please find
> it visible at (16k)
> --
> The attached gif show a snip from a schematic currently in layout.
> The transformer shows the secondary of the SMPS, connected
> to a whole mess of bulk capacitance, especially on +5V net.
> Please note L202 series inductor inserted between the bulk capacitance and
> the connection to the power plane. This worries me most. There seems to
> be no valid reason to stuff series inductance between the bulk and the
> plane. Further, all the local ceramic IC pin bypass will also have to
> suck current through that same inductor. Seems like a terrible idea to
> me. Comments welcome.
> Matt Stanik
> Sr. PCB Design Eng.
> Charles Industries, Ltd.

**** To unsubscribe from si-list or si-list-digest: send e-mail to [email protected] In the BODY of message put: UNSUBSCRIBE si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at

About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Thu Apr 20 2000 - 11:36:10 PDT