Power supply switching ripple and control loop phase margin are dominated by the output inductor and the bulk capacitors. Simulating capacitors accurately is crucial to optimizing circuit performance and avoiding unnecessary components. Simple RLC capacitor and inductor models can result in a design with more capacitors than necessary, adding to the design cost, consuming valuable circuit board real estate, and degrading the control loop performance.
Most capacitor datasheets provide very limited information, such as maximum ESR at 100kHz and not the desired information regarding typical values and frequency dependencies of the C, ESR, and ESL. This short video will show how to make these measurements efficiently and how to use the results directly or create high-fidelity measurement-based models for simulation in ADS.
Main topics covered in the video
- Introduction to Capacitor and Inductor Measurement & Simulation
- Techniques for Measuring Capacitors and Inductors
- Creating Accurate SPICE Models from Measurements
- Optimizing Measurement Accuracy
- Extending the Measurement Range
- Practical Applications in Circuit Design
- Final Recommendations & Resources
Source: Picotest
