Detailed Course Outline


1. Introduction to worst case analysis
• What is a Worst Case Circuit Analysis?
• Why do we do it?
• When do we do it?
• To what extent do we do it?
• Who should perform it/Review it?
• Using WCCA for Failure Analysis and Troubleshooting
• How does WCCA Save Money - WCCA Costs and Scheduling
• Where are the most problems found
• Electrical test as an alternative: reasons, methods, and limits

2. WCCA Methodologies
• Methods of analysis Sensitivity Analysis Parametric EVA Monte Carlo Analysis
• Comparison of methods and templates
• Tolerance Database Setup
• RSS Computations and Application
• Determining Critical Parameters
• Dealing with Poorly Defined Tolerances
• Example: 3-Terminal Linear Voltage Regulator
• Correlating Hardware-WCCA Results

3. Part Tolerances / Variability
• Tolerance Database Structures
• Calculating Tolerances
• Environmental and Aging Tolerances
• Radiation Tolerances and Effects (Aerospace Class only)
• Mean Shifts and RSSing
• Tolerances for Resistors, Capacitors
• Diodes, Zeners, BJTs, Mosfets
• Low Beta (hFE) and MOSFET Analysis

4. FMC1278, Aerospace TOR, and Other Standards
• Planning a WCCA - What to Analyze
• Complying with Standards
• WCCA Task Description Pitfalls
• Handling Compliance Requirements
• What data do I need to get?
• What will my WCCA Cost and How long will it take
• Navigating the WCCA Guide Analysis List
• Dealing with FMC1278 EMC Transients


5. Documentation
• Why is documentation important?
• Formating a report
• What must be included in a report?
• Example: Report
• Document and File Storage
• Reviewing a WCCA
• Dealing with Design Changes
• Dealing with Non-Compliances

6. Analysis Tools
• Digital, Analog, RF
• Mathcad and the Benefits of Mathematical Computations
• SPICE Simulation Pitfalls
• SPICE Modeling Reviewing Vendor Models Modeling Pitfalls Passive and Semiconductor Modeling Modeling Magnetics Subcircuit Model Examples
• Capacitor Modeling for Bulk and Decoupling
• Solving Convergence Problems

7. Testing for WCCA and Model Correlation
• Why it’s critical and how to do it right
• What's Required to Get Test Right
• Problems with Datasheets
• Testing Components & Power Supplies
• Stability, Load Step, and Power Distribution Networks (PDN)
• Is it Stable if I Can't Get to the Loop
• Power Integrity Issues
• Performing PDN Impedance Measurement and Analysis
• Hands-on Demonstrations: POL, Clocks, Jitter, EMI

8. Selected Examples
• Regulator: EMC Transients, Ripple, Stability, Startup, Inrush
• Motor Switching Analysis
• DC-DC Converter - Switching Frequency, Stability, Gate Drive
• Simple Switcher Analysis
• Monte Carlo Analysis - The Right Way to do it

9. Extended Topics
• Stress and Derating Analysis Guidelines
• Opamp and Power IC Models
• Radiation Analysis (Aerospace Course Only) Single Event Effect, TID, Neutron Fluence, SEU, SET, SEL,

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