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!
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.
Youâre 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 several PCBsto
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 lucrativeseries
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 then ceramics.
On a practical note: if you need an ohm of ESR, you can simply add a
one-ohm discrete resistor. The added piece increases the inductance, but1000
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.mÃ) 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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