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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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Presentation Transcript
slide1

2010. 12. 28

Switching Mode

Power Supplies (SMPS)

Power Supply CookBook (2nd) – Marty Brown

윤 자 웅

BioMedical Instrumentation Lab., BME, Yonsei University

slide2

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

slide3

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

slide4

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

slide5

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

slide6

The Building – Block Approach - Functional Block Diagram

BioMedical Instrumentation Lab., BME, Yonsei University

slide7

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

slide8

Which Topology? - Comparison of PWM SMPS Topologies

500

BioMedical Instrumentation Lab., BME, Yonsei University

slide9

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

slide10

Topologies - Buck (Step Down) Converter

Buck : 날뛰다 , 걷잡을수 없다

BioMedical Instrumentation Lab., BME, Yonsei University

slide11

Topologies - Boost (Step up) Converter

BioMedical Instrumentation Lab., BME, Yonsei University

slide12

Topologies : Buck-Boost Converter

BioMedical Instrumentation Lab., BME, Yonsei University

slide13

Topologies : Fly-Back Converter

BioMedical Instrumentation Lab., BME, Yonsei University

slide14

Topologies : 1T – Forward Converter

BioMedical Instrumentation Lab., BME, Yonsei University

slide15

Topologies : Push-Pull Converter

BioMedical Instrumentation Lab., BME, Yonsei University

slide16

Topologies : Half-Bridge Converter

BioMedical Instrumentation Lab., BME, Yonsei University

slide17

Topologies : Full-Bridge Converter

BioMedical Instrumentation Lab., BME, Yonsei University

slide18

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

slide19

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

slide20

(*1)Selection the Power Switches and Rectifiers

BioMedical Instrumentation Lab., BME, Yonsei University

slide21

(*2) Estimation Component (Optional)

BioMedical Instrumentation Lab., BME, Yonsei University

slide22

Epilogue – Q&A

Thank you for your attention !

BioMedical Instrumentation Lab., BME, Yonsei University

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