Practical Computer Analysis of Switch Mode Power Supplies

dk1137_c000.pdf......Page 0
1.1.1 Buck Converter Û Continuous Mode......Page 11
1.1.2 Buck Converter Û Discontinuous Mode......Page 14
1.1.3 Boost Converter Û Continuous Mode......Page 16
1.1.4 Boost Converter Û Discontinuous Mode......Page 17
1.1.5 Buck Ò Boost Converter Û Continuous Mode......Page 18
1.1.6 Buck Ò Boost Converter Û Discontinuous Mode......Page 20
1.2.1 Frequency of Operation Factors ( FOFs)......Page 23
1.2.3 Current Mode Control......Page 24
1.2.4 Feedback and Feedforward Control Additions......Page 27
1.3 Conclusion......Page 28
2.1.1 Output Regulation......Page 29
2.1.2 Cross Regulation with Multiple Outputs......Page 32
2.1.3 Efficiency......Page 33
2.1.4 Miscellaneous Range and Threshold Considerations......Page 35
2.2 AC Requirements......Page 36
2.2.1 AC Control Loop Stability Margins......Page 37
2.2.2 Input Filter Stability Margins......Page 40
2.2.4 Electromagnetic Compatibility......Page 42
2.3.2 Line Transients......Page 43
2.3.4 Energy Storage for Line Dropouts......Page 44
2.4 Summary......Page 45
3.1 Buck and Boost Converter Continuous Mode Large Signal Models......Page 46
3.2 Buck and Boost Converter Discontinuous Mode Large Signal Models......Page 47
3.3 Buck and Boost Continuous and Discontinuous Mode Unified Models......Page 51
3.5 Buck–Boost (Flyback) Converter Discontinuous Mode Large Signal Model......Page 53
3.7 Cuk Converter Continuous Mode Large Signal Model......Page 56
3.8 Cuk Converter Discontinuous Mode Large Signal Model......Page 57
3.9 Cuk Converter Continuous and Discontinuous Mode Unified Model......Page 59
3.10 Boost Converter Model Analysis Example......Page 61
3.11 Summary......Page 66
4.1.1 Voltage Mode Converter Model Setup......Page 68
4.1.2 Open Loop Analysis ( Continuous and Discontinuous Modes)......Page 69
4.1.2.1 Forward Transfer Function......Page 73
4.1.2.3 Control to Output ( Voltage Mode)......Page 75
4.1.3 SMPS Closed Loop Analysis ( Continuous and Discontinuous Modes)......Page 77
4.1.3.1 AC Loop Gain ( Voltage Mode)......Page 82
4.1.3.2 SMPS Output Impedance ( Voltage Mode)......Page 83
4.1.3.3 SMPS Line Regulation ( Voltage Mode)......Page 85
4.1.3.4 SMPS Feedforward Analysis......Page 86
Analysis ( Line Regulation)......Page 87
4.2 Buck Converter SMPS Analysis ( Current Mode)......Page 89
4.2.1 Current Mode Converter Model Setup......Page 93
and Discontinuous Modes)......Page 95
4.2.2.1 Open Voltage Loop AC Output Impedance ( Current Mode)......Page 97
4.2.2.3 Control to Output Analysis ( Current Mode)......Page 98
4.2.2.4 Inner Inductor Current Control Loop Gain......Page 99
4.2.3 SMPS Closed Loop Analysis ( Current Mode)......Page 101
4.3 Summary......Page 102
5.1.1 Real- World Capacitor Macro......Page 104
5.1.2 Real- World Inductor Macro......Page 109
5.1.3 SMPS Diode Macro......Page 115
5.1.4 Integrated Circuit Controllers......Page 117
5.2 Parasitic Resistance Effects......Page 120
5.3.1 Input Filter......Page 122
5.3.2 Inrush Current Limiter......Page 123
5.3.3 Undervoltage Lockout and Soft Start Circuits......Page 124
5.3.4 Power Factor Correction Circuits......Page 125
5.3.5 Multiple Outputs......Page 129
5.3.6 Postregulated Output Circuits......Page 132
5.3.7 Synchronous Rectifier Circuits......Page 134
5.3.8 Energy Storage Systems......Page 135
5.4 Summary......Page 137
6.1 Pulse Width Modulator ( PWM) Controller Macromodel......Page 138
6.2 Practical Flyback SMPS Analysis......Page 145
6.2.1 Flyback SMPS Model Setup......Page 147
6.2.2 Flyback SMPS Large Signal Power ON/ OFF Analysis......Page 155
6.2.3 Flyback SMPS Large Signal Load and Line Transient Analysis......Page 157
6.2.4 Flyback SMPS Current- Limiting Performance......Page 160
6.2.6 Flyback SMPS AC Line Rejection Analysis......Page 162
6.3 Practical Buck SMPS Analysis with Parasitic Resistances......Page 166
6.3.1 Practical Buck Converter Model Development with Parasitic Resistances......Page 167
6.4 Practical Ï Loop- OpeningÓ Techniques for AC Analysis......Page 170
6.5 Buck SMPS Soft Start and “Hiccup” Current Limit Analysis......Page 175
6.6 Summary......Page 192
References......Page 193
A. 1 General Requirements......Page 195
A. 2 Fundamental Single- Stage LC Section Examples......Page 196
A. 3 Parallel Damped Single- Stage Input Filter......Page 198
A. 4 Series Damped Single Stage Input Filter......Page 212
A. 5 Two-Stage Input Filter Design......Page 221
B. 1 UC 1844 Circuit- Averaging Macromodel Development......Page 224
B. 2 UC 1825A Circuit- Averaging Macromodel Development......Page 233
Practical Computer Analysis of Switch Mode Power Supplies......Page 1
Preface......Page 4
Author......Page 6
Contents......Page 7