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BioMedical Instrumentation Lab., BME, Yonsei University

2010. 12. 28. Switching Mode Power Supplies (SMPS). Power Supply CookBook (2 nd ) – Marty Brown. 윤 자 웅. BioMedical Instrumentation Lab., BME, Yonsei University . Contents. Introduction of PWM SMPS The Fundamentals of PWM SMPS The Building – Block Approach Topologies of SMPS

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BioMedical Instrumentation Lab., BME, Yonsei University

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  1. 2010. 12. 28 Switching Mode Power Supplies (SMPS) Power Supply CookBook (2nd) – Marty Brown 윤 자 웅 BioMedical Instrumentation Lab., BME, Yonsei University

  2. Contents • Introduction of PWM SMPS • The Fundamentals of PWM SMPS • The Building – Block Approach • Topologies of SMPS • “Black-Box”test Method BioMedical Instrumentation Lab., BME, Yonsei University

  3. Intro. SMPS • Pulse Width Modulated (PWM) Power Supplies have been around for a long time. • However, it used from mid-1970s broadly. • Advantages : i) Smaller in Size ii) More Efficient • Disadvantages : i) More difficult to Design ii) Radiate more Electromagnetic Interference (EMI) BioMedical Instrumentation Lab., BME, Yonsei University

  4. The Fundamentals. • Saturation & Cutoff in Power TRs. :ㅣi) Low-V / High-I ii) High-V / Low-I • “Chopping”&“Duty Ratio” • Two Major Type of SMPS 1) Forward-Mode Convertor 2) Boost-Mode Convertor BioMedical Instrumentation Lab., BME, Yonsei University

  5. The Building – Block Approach - Design Flow First, Produce a very good “Paper Design” If you have a good library book or Data Sheet, it will be done within 8 Working hours. BioMedical Instrumentation Lab., BME, Yonsei University

  6. The Building – Block Approach - Functional Block Diagram BioMedical Instrumentation Lab., BME, Yonsei University

  7. Which Topology? • What is the Topology? • A Major decision is Which basic Topology to Use! • Each Topology has its relative merit. • The best choice provides the best performance at the needed cost BioMedical Instrumentation Lab., BME, Yonsei University

  8. Which Topology? - Comparison of PWM SMPS Topologies 500 BioMedical Instrumentation Lab., BME, Yonsei University

  9. Topologies • Buck Converter • Boost Converter • Buck-Boost Converter • Fly-Back Converter • 1T Forward Converter • Push – Pull Converter • Half Bridge Converter • Full Bridge Converter BioMedical Instrumentation Lab., BME, Yonsei University

  10. Topologies - Buck (Step Down) Converter Buck : 날뛰다 , 걷잡을수 없다 BioMedical Instrumentation Lab., BME, Yonsei University

  11. Topologies - Boost (Step up) Converter BioMedical Instrumentation Lab., BME, Yonsei University

  12. Topologies : Buck-Boost Converter BioMedical Instrumentation Lab., BME, Yonsei University

  13. Topologies : Fly-Back Converter BioMedical Instrumentation Lab., BME, Yonsei University

  14. Topologies : 1T – Forward Converter BioMedical Instrumentation Lab., BME, Yonsei University

  15. Topologies : Push-Pull Converter BioMedical Instrumentation Lab., BME, Yonsei University

  16. Topologies : Half-Bridge Converter BioMedical Instrumentation Lab., BME, Yonsei University

  17. Topologies : Full-Bridge Converter BioMedical Instrumentation Lab., BME, Yonsei University

  18. The “Black-Box”Considerations • What is the “Black-Block”test ? • This allows the designer to determine whether the choice of topology is correct BioMedical Instrumentation Lab., BME, Yonsei University

  19. The “Black-Block”Considerations - Sequence • Output Power : • Input Power : • Average Input Currents : • Input Peak Current ; • Selection the Power Switches and Rectifiers (*1) • Estimation Component (Optional) (*2) BioMedical Instrumentation Lab., BME, Yonsei University

  20. (*1)Selection the Power Switches and Rectifiers BioMedical Instrumentation Lab., BME, Yonsei University

  21. (*2) Estimation Component (Optional) BioMedical Instrumentation Lab., BME, Yonsei University

  22. Epilogue – Q&A Thank you for your attention ! BioMedical Instrumentation Lab., BME, Yonsei University

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