Become an expert on doing quick searches to find the right ceramic part for your design, create plots for capacitance, ESR and other electrical properties, and estimate aging effect on ceramic capacitors

1. © KEMET Electronics Corporation. All Rights Reserved.
KEMET Digital Tools Workshop
April 29th, 2019 Presenter: Ana Ogui Magaña

2. 2© KEMET Electronics. All Rights Reserved.

3. 3© KEMET Electronics. All Rights Reserved.
We Are Different
We make complex
choices simple
and fast through
digitalization.
Quoting
Simulation tools
YouTube videos
Search & cross
Virtual FAE
Mobile App
Engineering Center
Digital Engagement Platform
Spec/data
sheet step files

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Tools we’re going to review today
1. KEMET.com
2. Engineering Center
3. Aging calculator
4. Component Edge
5. Spec/Data sheets
6. KSIM
7. KEMET YouTube

5. KEMET.com
• Use this tool to:
http://www.kemet.com
See New Product launches Access Product Catalogs

6. Engineering Center
• Use this tool for: technical search (KEMET products, terminology,
definitions, product characteristics, applications, webinars)
https://ec.kemet.com
• How does temperature affect capacitance change in ceramic
capacitors?
EXAMPLE

7. Engineering Center
• How does temperature affect capacitance change in ceramic capacitors?

8. Aging calculator
Exhibited by Ferroelectric dielectrics
Class II, III, and IV
(X7R, X5R, Y5V)
Over time,
molecular structure
changes
Material’s dielectric
constant changes
Holds less
electrical charge
Capacitance will
decline over time
What does Aging mean?

9. Aging calculator
For Class II and Class III diel
X7R, X5R, Y5V and so on
Cap decreases over time
KEMET part number C0603C105K8PACTU
But, how much?

10. Aging calculator
• Use this tool to: Create a chart of expected capacitance over
time for a specific KEMET PN.
https://ec.kemet.com/tools
https://search.kemet.com
Available in Engineering Center “Design Tools”

11. Aging calculator
Tolerance
Capacitance (F)
Aging rate %
Referee time
INPUT OUTPUT
Nominal “aged”
cap, lower and
upper Tol bands
Aging Curve
Aging curve for PN C1210C104K2RACTU

12. Component Edge
• Use this tool to search any KEMET PN and
to cross competitors parts.
https://search.kemet.com
1. Enter KEMET Part Number
2. Enter description or key words
3. Browse by menus
10nF 250VAC

13. Component Edge
Download Specsheet & Datasheet Access KSIM
See available inventory
in Distribution
STEP File

14. Component Edge
Cross and compare part numbers
2
1 3

15. Component Edge
• What’s the temperature coefficient and insulation resistance for PN
C1812C145J5JLC7800? Does it meet RoHS? Which are the benefits of the
series?
EXAMPLE

16. Component Edge
• How does C1206C102KDGACTU compare to C1206C102KDRACTU in
terms of electrical specs and which one would you rather use for pulse
applications?
EXAMPLE

17. KSIM
• Use this tool for: capacitor simulation and to export SPICE models
http://ksim.kemet.com
Determine:
• Impedance and ESR
• Capacitance and Inductance
• Current and Voltage
• Temperature Rise
• SPICE model
• Effect of combined Impedances
• Export of SPICE models

18. KSIM
Optional: external
resistance, inductance
Operating Voltage or
“DC bias”
Operating
Temperature
Start and stop
operating Frequency
PN
INPUT OUTPUT
Temp rise vs Ripple
Current
Capacitance vs Vbias
Current & Voltage
Capacitance &
Inductance (SRF)
Impedance & ESR

19. KSIM
• What’s a SPICE model and why is so import to our customers?
Simulation Program with Integrated Circuit
Emphasis
SPICE
Open-source software that simulates the operating
conditions of analog circuits.
Simulating the circuit with SPICE is the industry-
standard way to verify circuit operation at the
transistor level before committing to manufacturing
an integrated circuit.
SPICE for C1812C474J5JAC @ 25°C and 0VDC bias

20. KSIM
• What is the
impedance and ESR
of
C1206C154K2RAC
at a frequency of
1MHz with a bias of
50V at 85°C?
EXAMPLE
Impedance = 1.263 Ohms
ESR = 25.222 mOhms

21. KSIM
• What is the
maximum allowable
ripple current for
C1206C105K3RAC
at 130°C and
3MHz?
HINT: Use Current &
Voltage plot
EXAMPLE
NOTE: Temperature must be
changed to 125°C since this
is a X7R diel
Max current = 2.423 Arms

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Thank you!
Ana Ogui Magaña
Technical Product Specialist - Ceramics
KEMET Electronics
anamagana@kemet.com