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Large Format Cell Testing
for Electric Mobility Applications
EMC Management in Charging Applications

ESD Compliance in a Server Room

Getting the Best EMC From Shielded Cables Up to 2.8 GHz

EMC Management in Charging Applications

ESD Compliance in a Server Room

Getting the Best EMC From Shielded Cables Up to 2.8 GHz

September 2022
Special Coverage EOD/ESD Symposium 2022
September 2022
Volume 14 l Number 9
By Michael C. Strzepa
Cell-level analysis and testing for batteries used in electric mobility applications can help mitigate risks to application performance and long-term reliability.
By Dr. Min Zhang
Implementing a process of EMC compliance for a specific project is much more than simply ensuring that the design engineers follow a long list of “do’s and don’ts” in the form of EMC design rules. Following this process will reap benefits when EMC performance is evaluated at the end of the design process.
By David Long
A careful review of empirical research, multiple ESD standards, and return on investment provides a strong case for evaluating the installation of ESD flooring in server rooms and data centers.
By Keith Armstrong
Part 1 of this two-part article explores some basic rules for terminating cable shields. Part 2 of the article will appear in our October 2022 issue and will summarize the results of recent testing conducted by the author on the shielding effectiveness of screened cables up to 2.8 GHz
digital rendering of the inside of a car
blue and red digital screen with a fully charged battery symbol
server room
ripped cords twisted together
clipart of a lightning bolt
A Preview of the Symposium taking place in Reno, Nevada September 18 – 23, 2022
skyline in Reno
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EMC Concepts Explained
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Hot Topics in ESD
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compliance news
EU Commission Publishes Updated “Blue Guide” on Product Rules
The Commission of the European Union (EU) has recently published an updated version of its guide on the application of EU rules and regulations to a wide range of products.

The EU’s “Blue Guide on the implementation of the product rules 2022” provides a detailed explanation of current regulations applicable to toys, measuring instruments, radio equipment, low voltage electrical equipment, medical devices, and other types of products. The Blue Guide offers readers explanations and non-binding advice on navigating the EU’s conformity assessment systems, CE marking requirements, and market surveillance activities…

FDA Launches New Premarket Submissions Tracker
The U.S. Food and Drug Administration (FDA) has now made available an online platform for uploading and tracking the progress of premarket submissions for medical devices.

According to a posting on the FDA’s website, the updated Customer Collaboration Portal went live in mid-July and now allows medical device manufacturers to upload medical device submission files for 510(k) and De Novo applications in both eSTAR and eCOPY formats. This eliminates the need for device manufacturers to create and mail compact discs or flash drives to the FDA…

DILBERT comic strip
DILBERT © 2022 Scott Adams. Used By permission of ANDREWS MCMEEL SYNDICATION. All rights reserved.
Feature Article
Large Format Cell Testing for Electric Mobility Applications
Challenges and Best Practices for Cell-Level Testing
By Michael C. Strzepa
Large Format Cell Testing for Electric Mobility Applications

he lithium-ion cell is the heart of the modern-day electric vehicle. Proper cell selection, supported by analysis and testing, can make or break a vehicle’s performance in the market. Consumer concerns of range anxiety, performance in extreme climates, and long-term reliability directly translate into brand image and warranty costs for producers.

This article will review some of the challenges and best practices associated with cell-level testing. Although the focus is on electric vehicle applications, the material presented shares applicability with other market segments in electric mobility as well as energy storage applications, both residential and grid-level.

The Cell-to-Vehicle Hierarchy
When considering an electric vehicle as a system, there is a natural hierarchy to the key components that enable the vehicle’s electrification. In simple terms, it all begins with the cells. Cells, in turn, are integrated into modules. Modules are combined to produce a battery pack. Finally, the battery pack is merged with other key components of the drive train comprising the motive aspects of the vehicle.

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Feature Article
EMC Management in Charging Applications

Managing the EMC Process So You Can Pass the First Time

By Dr. Min Zhang
EMC Management in Charging Applications
Interpreting EMC Standards
Picture yourself as part of a team of engineers who are specialized in designing chargers. A new project comes along. How do you ensure the final design will pass the standard EMC tests the first time?

A typical first step is to interpret the relevant EMC standards that are applicable to the specific application. (Quality, safety, and environmental standards are equally if not more important, but they are not in the scope of this discussion.) One must look at the commercial EMC standards if the product is a fast charger for mobile phones and laptops. The automotive EMC standards should be applied if the product is an on-board charger (OBC) used in an electric vehicle. If it is a product based on wireless power transfer (WPT), one should refer to relevant standards and stay alert to changes as the standards are still being developed.

As an example, Table 1 lists the typical EMC test requirements that are applicable to an OBC.

Feature Article
ESD Compliance in a Server Room
How To Select ESD Flooring for a Space with No Set Industry Standards
By David Long
server room

tatic-control flooring provides protection against electrostatic discharge (ESD) in multiple industries servicing disparate applications that range from eliminating annoying shocks to protecting aircraft flight-tower operations from equipment malfunctions. Often referred to by the term ESD flooring, this category of flooring can protect static-sensitive electronic devices and equipment from harmful (but, due to its invisibility, seemingly inconsequential) levels of static discharge, far below the threshold of human sensitivity. In other instances, ESD flooring is installed to prevent static sparks from causing ignition of flammable chemicals, munitions, explosives, and energetic materials.

In their article “Are Data Centers Drying Up,”1 authors Beaty and Quirk discuss alternatives to humidification, like ESD flooring, for preventing real-life ESD problems in data centers, such as:

  • Self-correcting errors (such as a lost package in LAN traffic);
  • An upset that may need user intervention; or
  • Actual physical damage to IT equipment
EOS/ESD Symposium Preview
clipart of a lightning bolt
Reno, Nevada
September 18 – 23, 2022
Souvick Mitra
Souvick Mitra
General Chair
Dear colleagues, friends, and ESD enthusiasts,
On behalf of EOS/ESD Association, Inc. and the 2022 Symposium Steering Committee, it is my honor to welcome you to the proceedings of the 44th Annual EOS/ESD Symposium and Exhibits at The Peppermill Resort & Casino in Reno, Nevada. The EOS/ESD Symposium represents the world’s leading forum on Electrostatic Discharge and Overstress. Although COVID-19 is still impacting our business and operations significantly, the Steering Committee and the Technical Program Committee, with all our great volunteers, spared no effort to ensure that the 44th Symposium is a great experience for all attendees, on-site or livestream.

The 44th EOS/ESD Symposium program has six focus areas dedicated to advanced technologies and device testing, automotive, communications, mixed voltage applications, low-power, and EMC. Each focus area comprises sessions with technical papers, invited talks, tutorials, seminars, and workshops. In parallel, the “manufacturing track” offers 3.5 days of technical sessions, hands-on sessions, workshops, discussion groups, and technology showcases in the field of EOS/ESD in manufacturing – control materials, technologies, and techniques.

The Technical Program Committee has selected 23 technical papers for the Symposium covering almost all aspects of the ESD world. These papers are presented by experts from industry and academia, driving leading-edge research and development, and have been peer-reviewed by international experts. Additionally, the RCJ Best Paper authors have been invited to present their work at the EOS/ESD Symposium.

Feature Article
Getting the Best EMC from Shielded Cables Up to 2.8 GHz, Part 1
How to Terminate Multiple Shields in a Cable Bundle
By Keith Armstrong
Shielded Cables

couple of years ago, I needed to know the shielding effectiveness (SE) of screened cables up to at least 18GHz, but – apart from coaxial cables intended for use in EMC2 test laboratories – I could only find information up to 100MHz, such as Figure 1.

Accordingly, I set out to make my own measurements with the resources and time made available to me.

In these measurements, I used many different constructions of cable to try to answer the perennial debate about how best to terminate the individual shields of multiple-shielded cables, including single or double overall braids (overbraids), and individual shielded cables contained within an overbraid.

These measurements covered a great deal more than I have described in this brief article, but I am unable to report the other results for confidentiality and/or security reasons.

EMC concepts explained
Eye Diagram
Part 2: Impact of Driver, HDMI Cable, and Receiver
By Bogdan Adamczyk, Krzysztof Russa, and Nicholas Hare

his is the second of two articles devoted to the Eye Diagram. Part 1 presented the fundamental definitions and concepts [1]. This article, Part 2, addresses the impact of driver, HDMI cable, and receiver on signal quality using data eye, based on the following criteria: data eye opening, data mask violation, and data jitter.

Measurement Setup
The study included three different HDMI signal sources, four different HDMI cables, and two different receivers. The block diagram of the measurement setup appears in Figure 1.

The study focused on the evaluation of eye diagrams using the following criteria: eye opening, eye mask violations, and data jitter. The data jitter was presented in the form of a histogram.

Impact of HDMI Sources

In this part of the study, we compared three different HDMI Sources, while the cable length was the same (3-ft), and the same HDMI Receiver was used (Receiver 1). HDMI Sources used in the study had significant implementation differences. Differences consisted of Driver IC and its configuration, differential trace routing, and HDMI connector style. Figure 2 shows the resulting eye diagrams.
hot topics in ESD
Industry Council’s
Latch‑up Survey
By Theo Smedes for EOS/ESD Association, Inc.

n July 2020, the Industry Council on ESD Target levels, in collaboration with the JEDEC JESD78 working group, launched a survey on latch-up testing. As described in an earlier article [1] in this magazine, the survey was conducted to better understand how the present latch-up standard (JESD78 revision E) is interpreted and used in the industry. The article also invited representatives from the industry to participate in order to collect data and opinions. The survey is closed, but a pdf version is still available at

This article provides a high-level overview of the Industry Council paper “Survey on Latch-up Testing Practices and Recommendations for Improvements,” which describes the full analysis of the collected responses and lays a path for potential adaptations needed to accommodate its use in future technologies and applications. Based on the survey results, we summarize the key issues documented in the paper that include problems with the latch-up standard and its application. Based on that analysis, the compiled results suggest improvements for better understanding and future JESD78 related testing. This article serves explicitly as an invitation to read the published paper, which is freely available from the Industry Council website [2] and will also become available via the JEDEC website [3].

GHz radar pulses can interfere with motor cars

Because of their mobility, vehicles will be placed in many different kinds of Electromagnetic environment. From driving next to transformers and high voltage power lines operating at 50 or 60Hz to driving next to airports where the approaching and landing radars operate at 1.2 to 1.4GHz and 2.7 to 3.1GHz…

Telecomm globalisation and related interference issues

Some uniformity does exist in the requirements of the POTS (plain-old-telephone-system), at least in how the equipment works. Regulatory standards that the phone equipment must comply with vary from country to country, however. No one knows this fact better than the designers at Silicon Labs. Many years ago, they set out to design a modem that would comply with every standard in the world. Thus, they created the Isomodem line of chips…

Some power quality issues for products marketed worldwide

To compete in the global market, today’s analog ICs must address a wide range of application and vo9ltage requirements,” says Doug Bailey, vice-president of marketing for Power Integrations. “For example, we know that Japan’s ac main can be as low as 90V power, whereas Europe uses 240V (actually 230V rms, 240V only in the UK – Editor). At first blush, this information seems like enough to design a power supply that will operate worldwide. The reality is more difficult. In India, the power grid is unreliable, forcing many big electricity consumers to use private generators during outages…

Upcoming Events
September 5-8
EMC Europe 2022

September 13-15
The Battery Show

September 13-15
Fundamentals of Random Vibration and Shock Testing Training

September 13-16
Lab Techniques, Robust Design, and Troubleshooting

September 18-23
44th Annual EOS/ESD Symposium

September 20
IEEE Rock River Valley EMC Seminar

September 20-22
ISPCE 2022

September 20-23
Applying Practical EMI Design & Troubleshooting Techniques

Advanced Printed Circuit Board Design for EMC+SI

Mechanical Design for EMC

September 29
2022 Minnesota EMC Event

October 6-7
Fundamental Principles of Electromagnetic Compatibility and Signal Integrity

October 9-14
AMTA 2022

October 17-20
Military Standard 810 (MIL‑STD 810) Training

October 18
2022 San Diego Test Equipment Symposium

Due to COVID-19 concerns, events may be postponed. Please check the event website for current information.
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