biomedical instrumentation lab., bme, yonsei university 윤 자 웅윤 자 웅 2010. 12. 28...
TRANSCRIPT
BioMedical Instrumentation Lab., BME, Yonsei University
윤 자 웅
2010. 12. 28
Switching Mode Power Supplies
(SMPS)
Power Supply CookBook (2nd) – Marty Brown
Contents
BioMedical Instrumentation Lab., BME, Yonsei University
1. Introduction of PWM SMPS
2. The Fundamentals of PWM SMPS
3. The Building – Block Approach
4. Topologies of SMPS
5. “Black-Box”test Method
Intro. SMPS
BioMedical Instrumentation Lab., BME, Yonsei University
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
Interfer-
ence (EMI)
The Fundamentals.
BioMedical Instrumentation Lab., BME, Yonsei University
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
The Building – Block Approach - Design Flow
BioMedical Instrumentation Lab., BME, Yonsei University
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.
The Building – Block Approach - Functional Block Diagram
BioMedical Instrumentation Lab., BME, Yonsei University
Which Topology?
BioMedical Instrumentation Lab., BME, Yonsei University
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 perfor-
mance
at the needed
cost
Which Topology? - Comparison of PWM SMPS Topologies
BioMedical Instrumentation Lab., BME, Yonsei University
500
Topologies
BioMedical Instrumentation Lab., BME, Yonsei University
Buck Converter
Boost Converter
Buck-Boost Converter
Fly-Back Converter
1T Forward Converter
Push – Pull Converter
Half Bridge Converter
Full Bridge Converter
Topologies - Buck (Step Down) Converter
BioMedical Instrumentation Lab., BME, Yonsei University
Buck : 날뛰다 , 걷 잡을수 없다
Topologies - Boost (Step up) Converter
BioMedical Instrumentation Lab., BME, Yonsei University
Topologies : Buck-Boost Converter
BioMedical Instrumentation Lab., BME, Yonsei University
Topologies : Fly-Back Converter
BioMedical Instrumentation Lab., BME, Yonsei University
Topologies : 1T – Forward Converter
BioMedical Instrumentation Lab., BME, Yonsei University
Topologies : Push-Pull Converter
BioMedical Instrumentation Lab., BME, Yonsei University
Topologies : Half-Bridge Converter
BioMedical Instrumentation Lab., BME, Yonsei University
Topologies : Full-Bridge Converter
BioMedical Instrumentation Lab., BME, Yonsei University
The “Black-Box”Considerations
BioMedical Instrumentation Lab., BME, Yonsei University
What is the “Black-Block”test ?
This allows the designer to determine whether the choice of topology is
correct
The “Black-Block”Considerations - Sequence
BioMedical Instrumentation Lab., BME, Yonsei University
1. Output Power :
2. Input Power :
3. Average Input Currents :
4. Input Peak Current ;
5. Selection the Power Switches and Rectifiers (*1)
6. Estimation Component (Optional) (*2)
(*1) Selection the Power Switches and Rectifiers
BioMedical Instrumentation Lab., BME, Yonsei University
(*2) Estimation Component (Optional)
BioMedical Instrumentation Lab., BME, Yonsei University
Epilogue – Q&A
BioMedical Instrumentation Lab., BME, Yonsei University
Thank you for your attention !