Introduction to EMC Design For Compliance Welcome
Welcome
Introduction to EMC Design For Compliance
What is EMC? • We want to use electromagnetic energy for our own purposes • We don’t want unintended emissions – either radiated or conducted • Our circuits inherently generate electromagnetic fields • Our task is to design products that meet radiated and conducted emission limits • Also our job to make sure that our products don’t interfere with themselves
Circuit Board Examples
Probably going to fail EMC
Probably going to pass EMC
Why Bother With EMC? • 50% first time failure rate on average • Some labs report >90% failure rate • Less money on development costs • Less money on testing costs • Faster time to market • Produce more products per year • Cleaner power supplies • Better signal integrity • Better immunity performance
Benefits for Engineers • EMC knowledge is in demand • Improve your employability • Demand for EMC is increasing - Clock rates rising - EMC testing expanding • Higher salary/ hourly rate
EMC consultants regularly charge >$150/h!
Branches of EMC Knowledge Internal
External
Design for Compliance Signal Integrity S/N Ratio Noise Margin Overshoot Ringing Eye Diagrams Crosstalk Jitter
Emissions
Test & Measurement Emissions
Immunity
Interference Susceptibility
Radiated Conducted Flicker Harmonics Mag. Field
ESD Radiated EFT Surge Conducted Mag. Field Dips, drops Ringwave
Immunity IC, PCB, System
Power Integrity Coupling
Full/Pre-Compliance
Simulation
Regulatory Troubleshooting
Real Issues
Processes and Mindsets of Companies Who Pass 1. 2. 3. 4. 5. 6. 7. 8. 9.
Clearly define the problem for all of their engineers Engineers are trained in design for compliance Have a robust process for reviewing and checking their design Investment in pre-compliance test equipment Ongoing training for new and experienced engineers EMC considered early in the design cycle Learn from their mistakes View EMC as a predicable and solvable problem Management see value in investing in solutions
... And the Companies Who Normally Fail 1. 2. 3. 4. 5. 6. 7. 8.
The problem is not well defined Very few companies have a robust EMC pre-scan/review procedure EMC design knowledge is not efficiently taught to new engineers EMC considered late in design cycle No feedback loop from EMC labs to industry Belief that EMC is a ‘black art’ Belief that failures are random. Can’t predict everything Lack of visibility of the issue from management
Introduction to this Course Introduction to topics covered: • EMC design rules • Foundation concepts • PCB stackups and PDN impedance • Coupling mechanisms • Return paths • System and board level grounding • Decoupling capacitor selection, placement and routing • Filtering
• Shielding • Signal integrity • SMPS design • EMI cost reduction • Isolated power supplies • Tools & resources
Recommended Books 1. 2. 3. 4.
Electromagentic Compatibility Engineer, H. Ott EMC Design Techniques, K. Armstrong EMC for PCBs, K. Armstrong EMC for Product Designers, T. Williams
Meet the Instructors Andy Eadie – The test + measurement + hardware guy
Dr. Moises Ferber – The theoretical + SMPS guy
Antonio Aquino – The signal/power integrity + simulation guy
How to Navigate the Website • Use forums to ask questions • Mark each module as complete once finished • Access Design Review Pro tool
End of Introduction
Let’s get started!
Introduction to EMC Design For Compliance
What is EMC? • We want to use electromagnetic energy for our own purposes • We don’t want unintended emissions – either radiated or conducted • Our circuits inherently generate electromagnetic fields • Our task is to design products that meet radiated and conducted emission limits • Also our job to make sure that our products don’t interfere with themselves
Circuit Board Examples
Probably going to fail EMC
Probably going to pass EMC
Why Bother With EMC? • 50% first time failure rate on average • Some labs report >90% failure rate • Less money on development costs • Less money on testing costs • Faster time to market • Produce more products per year • Cleaner power supplies • Better signal integrity • Better immunity performance
Benefits for Engineers • EMC knowledge is in demand • Improve your employability • Demand for EMC is increasing - Clock rates rising - EMC testing expanding • Higher salary/ hourly rate
EMC consultants regularly charge >$150/h!
Branches of EMC Knowledge Internal
External
Design for Compliance Signal Integrity S/N Ratio Noise Margin Overshoot Ringing Eye Diagrams Crosstalk Jitter
Emissions
Test & Measurement Emissions
Immunity
Interference Susceptibility
Radiated Conducted Flicker Harmonics Mag. Field
ESD Radiated EFT Surge Conducted Mag. Field Dips, drops Ringwave
Immunity IC, PCB, System
Power Integrity Coupling
Full/Pre-Compliance
Simulation
Regulatory Troubleshooting
Real Issues
Processes and Mindsets of Companies Who Pass 1. 2. 3. 4. 5. 6. 7. 8. 9.
Clearly define the problem for all of their engineers Engineers are trained in design for compliance Have a robust process for reviewing and checking their design Investment in pre-compliance test equipment Ongoing training for new and experienced engineers EMC considered early in the design cycle Learn from their mistakes View EMC as a predicable and solvable problem Management see value in investing in solutions
... And the Companies Who Normally Fail 1. 2. 3. 4. 5. 6. 7. 8.
The problem is not well defined Very few companies have a robust EMC pre-scan/review procedure EMC design knowledge is not efficiently taught to new engineers EMC considered late in design cycle No feedback loop from EMC labs to industry Belief that EMC is a ‘black art’ Belief that failures are random. Can’t predict everything Lack of visibility of the issue from management
Introduction to this Course Introduction to topics covered: • EMC design rules • Foundation concepts • PCB stackups and PDN impedance • Coupling mechanisms • Return paths • System and board level grounding • Decoupling capacitor selection, placement and routing • Filtering
• Shielding • Signal integrity • SMPS design • EMI cost reduction • Isolated power supplies • Tools & resources
Recommended Books 1. 2. 3. 4.
Electromagentic Compatibility Engineer, H. Ott EMC Design Techniques, K. Armstrong EMC for PCBs, K. Armstrong EMC for Product Designers, T. Williams
Meet the Instructors Andy Eadie – The test + measurement + hardware guy
Dr. Moises Ferber – The theoretical + SMPS guy
Antonio Aquino – The signal/power integrity + simulation guy
How to Navigate the Website • Use forums to ask questions • Mark each module as complete once finished • Access Design Review Pro tool
End of Introduction
Let’s get started!
