EMC Consutancy & Design solutions
EMC Course
Introduction
This section is intended to provide a comprehensive understanding of the design process solely from the point of view of EMC. It is the purpose of this course to teach you how to design an electronic product in such a way that it can be EMC-tolerant in the future. Please keep in mind that this is a WORK IN PROGRESS and that it may take one or two years to complete the project. In order to make sure you receive an update on every article we publish, we recommend you subscribe to our mailing list.
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Listed below is the current plan of the final EMC course, as shown in the table of content below. Whenever the text is underlined, it means that it was written by me (Francesco Poderico), otherwise, it means that it will be written as soon as possible. Although it has always been my intention to write a course that is as simple as possible, due to the complexity of the job this is not always possible. It is my hope that you will enjoy it.
Table of content
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Introduction to EMC-compliant design
Why does your equipment need to be EMC compliant?
Design for Electromagnetic compatibility
Voltage interruptions, voltage dips, surges and fluctuations
ESD between objects and persons
Radio interferences interferences
EMC compliant means quality of product
Understanding the EMC testing setup
Why is so important to understand the test setup?
Fast Transient, Surge, voltage dip Setup
Understanding the emission path
Radiation by a bad IDC cable design
Current loop by a PCB trace over a ground plane
The Eddie current and how to utilize it to minimize radiated emission.
Current loop by a PCB trace without ground plane
Understanding the expected emission of a squarewave
Understanding the expected emission of a triangular wave
Emission path during Conductive emission test
Design solutions
Typical design solutions for today's applications
Understanding the Cy and Cx capacitors
Protecting your device from inrush current
Protecting from overvoltage and ESD
How to minimise emissions from a heatsink
Radiated emission and conductive emission of an isolated DCDC converter
Reduction of even harmonic in a clock line
Reduction of off harmonic in a clock line
The operational amplifier as AM demodulator
Emission estimation
Using LTSpice to simulate and improve conductive emission
Understanding the capacitor model
PCB Layout and the return current design
Why the design of a return current is so important
Why we should call return and not ground
Typical error during PCB Layout
Changing layers (what not to do)
Calculate the bypass capacitor
Some considerations with the placement of vias between the capacitor and plane
Understanding the Bulk capacitor
Why does a lack of bulk capacitor creates also CE and RE issues
Product Design
How to connect the PCB To the Chassis
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Printed Circuit Board stack up
Why you should avoid a single-layer and double-layer design
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