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本帖最后由 taxus 于 2012-3-26 13:23 编辑
是Buck DC-DC Converter非常好的一部论文，
内容非常详细，循序渐进，覆盖面很广，里面的知识非常实用
Table of Contents
List of Figures................................................................................................xxi
List of Tables ...............................................................................................xxiii
1. Introduction ...................................................................................................... 1
1.2 Why use a switching regulator?.................................................................. 2
2. DC-DC Converter............................................................................................. 7
2.1 Introduction ................................................................................................ 7
2.2 What are SMPS?......................................................................................... 7
2.3 Types of Converters.................................................................................... 8
2.3.1 Non-Isolated DC/DC Converters......................................................... 8
2.3.2 Isolated DC/DC Converters................................................................. 8
2.4 Why work on Buck Converters?................................................................. 9
3. Buck Converter – Theory of Operation.......................................................... 11
3.1 Evolution of a Buck Converter................................................................. 11
3.2 Purpose of different components in the Buck Converter.......................... 14
3.2.1 Switch ................................................................................................ 14
Operating Frequency .................................................................................. 15
3.2.2 Inductor.............................................................................................. 16
3.2.3 Capacitor............................................................................................ 17
3.2.4 Freewheeling Diode/Transistor ......................................................... 17
3.2.5 Feedback............................................................................................ 18
3.3 States of Operation ................................................................................... 18
3.3.1 ON State ............................................................................................ 19
3.3.2 OFF State........................................................................................... 19
3.3.3 Continuous Mode / Discontinuous Mode.......................................... 20
3.4 Synchronous Buck Converters ................................................................. 21
3.4.1 Introduction ....................................................................................... 21
3.4.2 Topology............................................................................................ 21
3.4.3 Improvements .................................................................................... 22
3.4.4 Problems ............................................................................................ 22
4. Practical Issues of Buck Converter................................................................. 25
4.1 Calculation for Duty Ratio........................................................................ 25
4.2 Calculation for Inductor............................................................................ 26
4.3 Calculation for Capacitor.......................................................................... 30
4.4 PWM Controller ....................................................................................... 31
4.4.1 PWM.................................................................................................. 31
4.4.2 Comparator and Voltage to PWM Converter .................................... 32
4.5 Feedback Control System......................................................................... 33
4.6 Linearization using State-Space Averaging.............................................. 35
4.6.1 Power Stage & Output Filter ............................................................. 35
Thesis.pdf
(1.1 MB, 下载次数: 2157 )
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发表于 2012-3-26 13:20:06
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