This thread is awesome!
-----Original Message-----
From: Arumugham, Vinu [mailto:vinua@xxxxxxxxxx] ;
Sent: Friday, August 24, 2018 12:41 PM
To: leeritchey@xxxxxxxxxxxxx; Grasso, Charles <CHARLES.GRASSO@xxxxxxxx>;
joel.brown@xxxxxxxxxx; ken.patterson@xxxxxxxxxxxxxxxxx
Cc: asparky@xxxxxxxxxxxxxxxxxxxxxxxx; 'Istvan Novak'
<istvan.novak@xxxxxxxxxxx>; junichi.yamada.ak@xxxxxxxxxxx; 'SI-List'
<si-list@xxxxxxxxxxxxx>
Subject: Re: [SI-LIST] Re: Controled ESR capacitor
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Decoupling Capacitors Placement for a Multichip PDN by a Nature-Inspired
Algorithm https://ieeexplore.ieee.org/document/8106842/
________________________________________
From: leeritchey@xxxxxxxxxxxxx <leeritchey@xxxxxxxxxxxxx>
Sent: Friday, August 24, 2018 11:18 AM
To: Arumugham, Vinu; CHARLES.GRASSO@xxxxxxxx; joel.brown@xxxxxxxxxx;
ken.patterson@xxxxxxxxxxxxxxxxx
Cc: asparky@xxxxxxxxxxxxxxxxxxxxxxxx; 'Istvan Novak';
junichi.yamada.ak@xxxxxxxxxxx; 'SI-List'
Subject: RE: [SI-LIST] Re: Controled ESR capacitor
Do you mean elegantly randon?
-----Original Message-----
From: Arumugham, Vinu <vinua@xxxxxxxxxx>
Sent: Friday, August 24, 2018 11:09 AM
To: CHARLES.GRASSO@xxxxxxxx; joel.brown@xxxxxxxxxx;
ken.patterson@xxxxxxxxxxxxxxxxx; leeritchey@xxxxxxxxxxxxx
Cc: asparky@xxxxxxxxxxxxxxxxxxxxxxxx; 'Istvan Novak'
<istvan.novak@xxxxxxxxxxx>; junichi.yamada.ak@xxxxxxxxxxx; 'SI-List'
<si-list@xxxxxxxxxxxxx>
Subject: Re: [SI-LIST] Re: Controled ESR capacitor
Sprinkling is the lay term. In engineering it is called stochastic spacing
strategy.
________________________________________
From: si-list-bounce@xxxxxxxxxxxxx <si-list-bounce@xxxxxxxxxxxxx> on behalf of
leeritchey@xxxxxxxxxxxxx <leeritchey@xxxxxxxxxxxxx>
Sent: Friday, August 24, 2018 10:30 AM
To: CHARLES.GRASSO@xxxxxxxx; joel.brown@xxxxxxxxxx;
ken.patterson@xxxxxxxxxxxxxxxxx
Cc: asparky@xxxxxxxxxxxxxxxxxxxxxxxx; 'Istvan Novak';
junichi.yamada.ak@xxxxxxxxxxx; 'SI-List'
Subject: [SI-LIST] Re: Controled ESR capacitor
When did sprinkling become an engineering term? Sounds very arbitrary to me
and it is. Wouldn't change interplane resonances is any significant way.
Where did this idea come from? Is there supporting data?
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx <si-list-bounce@xxxxxxxxxxxxx> On Behalf Of
Grasso, Charles
Sent: Thursday, August 23, 2018 12:21 PM
To: joel.brown@xxxxxxxxxx; ken.patterson@xxxxxxxxxxxxxxxxx
Cc: Lee Ritchey <leeritchey@xxxxxxxxxxxxx>; asparky@xxxxxxxxxxxxxxxxxxxxxxxx;
Istvan Novak <istvan.novak@xxxxxxxxxxx>; junichi.yamada.ak@xxxxxxxxxxx; SI-List
<si-list@xxxxxxxxxxxxx>
Subject: [SI-LIST] Re: Controled ESR capacitor
I see two distinct applications. The low inductance application is for energy
delivery. The cap sprinkle (sorry Lee!) is to manage the interplane resonances.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Joel Brown
Sent: Thursday, August 23, 2018 10:47 AM
To: ken.patterson@xxxxxxxxxxxxxxxxx
Cc: Lee Ritchey <leeritchey@xxxxxxxxxxxxx>; asparky@xxxxxxxxxxxxxxxxxxxxxxxx;
Istvan Novak <istvan.novak@xxxxxxxxxxx>; junichi.yamada.ak@xxxxxxxxxxx; SI-List
<si-list@xxxxxxxxxxxxx>
Subject: [SI-LIST] Re: Controled ESR capacitor
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si-list-bounce@xxxxxxxxxxxxx
In the book I previously mentioned it clearly states the most important aspect
of a bypass cap is mounting inductance.
Adding a discrete resistor in series obviously adds a significant amount of
inductance.
But since the PDN impedeance would be flatter maybe the extra inductance can be
tolerated.
Would be interesting to see the trade offs between very low ESR with lowest
inductance and resistor in series with capacitor.
On Thu, Aug 23, 2018 at 8:58 AM, Ken Patterson <
ken.patterson@xxxxxxxxxxxxxxxxx> wrote:
You have to wear a mask as to not inhale them accidentally!then ceramics.
On Thu, Aug 23, 2018 at 11:56 AM <leeritchey@xxxxxxxxxxxxx> wrote:
I can't even see 0201s!action
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx <si-list-bounce@xxxxxxxxxxxxx> On
Behalf Of Aubrey Sparkman
Sent: Wednesday, August 22, 2018 5:08 PM
To: leeritchey@xxxxxxxxxxxxx
Cc: istvan.novak@xxxxxxxxxxx; junichi.yamada.ak@xxxxxxxxxxx;
si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Controled ESR capacitor
Discontinue 0402s for 0201s...
Consider using 0201s instead of 0402s if you are doing a redesign
due to caps.
Youre welcome! :-)
Aubrey
Sent from my iPhone
On Aug 22, 2018, at 11:29 AM, <leeritchey@xxxxxxxxxxxxx> <leeritchey@xxxxxxxxxxxxx> wrote:
discontinuing their 0603 sizes to focus on 0402 as that is where the
We just got informed by our ceramic capacitor suppliers that they
were
is with cell phones and tablets. Going to make is redesign severalto
PCBs
the smaller size.their
product cancellations: ceramic capacitor manufacturers are rerouting
What next?
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx <si-list-bounce@xxxxxxxxxxxxx>
On Behalf Of Istvan Novak
Sent: Tuesday, August 21, 2018 8:30 PM
To: junichi.yamada.ak@xxxxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Controled ESR capacitor
Hi Yamada,
This appears to be part of a generic trend of component shortage
and
existing production capabilities to higher-volume and more lucrative
applications. Users over the many years have been very successful
demanding lower prices to the point that it has become financially
not viable to invest in new manufacturing capacity. The interesting
twist is that people try to replace ceramic capacitors with other
types, for instance polymer capacitors, which tend to be more costly
On a practical note: if you need an ohm of ESR, you can simply add aseries
one-ohm discrete resistor. The added piece increases the1000
inductance, but with an ESR of an ohm, the impact tends to be small.
This of course wont help if you already have a product in volume
manufacturing with just the controlled-ESR footprint.
Regards,
Istvan Novak
On 8/21/2018 9:49 AM, Junichi Yamada wrote:
Hello experts
In my product, I use ESR controlled capacitor. (For example ESR >
Ken Pattersoncharacteristics.m) However, TDK decided to discontinue this product.
https://product.tdk.com/info/en/products/emc/emc/absorber/catalog
.htm
l
Please let me know if you know another capacitor with similar
* I know the Murata's LLR series. (However, there is the
possibility of discontinuing production as well.)
https://psearch.en.murata.com/capacitor/product/LLR185C70G105ME07%23.
h
tml
Regards.
Yamada
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