DC-DC Boost Converter: A Project Report Submitted
DC-DC Boost Converter: A Project Report Submitted
DC-DC Boost Converter: A Project Report Submitted
Bachelor of Technology
In
Electrical and Electronics Engineering
BY
Bachelor of Technology
In
Electrical & Electronics Engineering
Submitted By
CERTIFICATE
---------------------------------------------- -------------------------------------------
Dr.Satyajit Mohanty Prof. Ganesh Prasad Khuntia
Assistant Professor H.O.D., Dept of EEE
Project Guide
----------------------------------------
External Examiner
ACKNOWLEDGEMENT
Behind every student who ascends the height of success and achievement
has a group effort and it is reflected in this project. We can not undermine
the role and responsibility of the people who were instrumental in
extending all possible support for preparation of this project report.
We further take this opportunity to thank all the staff members of our
college for taking active participation and providing us all the necessary
data and statistics during the preparation of our report so as to make it a
great success.
ABSTRACT
DC –DC converters are power electronic circuits that convert a dc voltage to a
different voltage level. There are different types of conversion method such as
electronic, linear, switched mode, magnetic, capacitive. The circuits described in
this report are classified as switched mode DC-DC converters. These are electronic
devices that are used whenever change of DC electrical power from one voltage
level to another is needed. Generically speaking the use of a switch or switches for
the purpose of power conversion can be regarded as an SMPS. From now onwards
whenever we mention DC-DC converters we shall address them with respect to
SMPS. A few applications of interest of DC-DC converters are where 5V DC on a
personal computer motherboard must be stepped down to 3V, 2V or less for one of
the latest CPU chips; where 1.5V from a single cell must be stepped up to 5V or
more, to operate electronic circuitry. In all of these applications, we want to change
the DC energy from one voltage level to another, while wasting as little as possible
in the process. In other words, we want to perform the conversion with the highest
possible efficiency. DC-DC Converters are needed because unlike AC, DC can’t
simply be stepped up or down using a transformer. In many ways, a DC-DC
converter is the DC equivalent of a transformer. They essentially just change the
input energy into a different impedance level. So whatever the output voltage level,
the output power all comes from the input; there is no energy manufactured inside
the converter. Quite the contrary, in fact some is inevitably used up by the
converter circuitry and components, in doing their job.
TABLE OF CONTENTS
ACKNOWLEDGEMENTS a
ABSTRACT i
TABLE OF CONTENTS ii
LIST OF FIGURES iv
CHAPTER 1
INTRODUCTION 1
1.1 RATIONALE 1
1.2 PURPOSE OF THE PROJECT 1
CHAPTER 2
BACKGOUND AND LITERATURE REVIEW 2
2.1 OVERVIEW 2
2.2 HISTORY 2
2.3 APPLICATIONS 2
CHAPTER 3
METHODOLOGY 4
3.1 GENERAL BOOST CONVERTER CONFIGURATION 4
3.2 BLOCK DIAGRAM 8
3.3 SPECIFICATIONS 9
3.4 COMPONENT FUNCTIONS 10
3.5 COMPONENT CALCULATIONS 11
3.5.1 LOAD RESISTANCE 12
3.5.2 DUTY CYCLE 13
3.5.3 CAPACITOR 14
3.5.4 INDUCTOR 15
3.5.5 DIODE 19
3.5.6 MOSFET 20
ii
3.6 LOSS CALCULATION 24
3.6.1 DIODE LOSS 25
3.6.2 SWITCHING LOSS 26
3.6.3 GATE CIRCUIT LOSS 27
3.6.4 CONDUCTION LOSS 27
3.7 EFFICIENCY 28
CHAPTER 4:
4.1 Operation 29
4.2 Application 33
CHAPTER 5
CONCLUSION 34
REFERENCE 35