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Texas Instruments C2000 Technical Training
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Lab2
: PWM Ge
neration
/ Ope
n-Loop
C
ontrol
Control Buck output
voltage using s
i
mpl
e PWM
duty cycle adjustment
without feedb
ack
Use CCS w
atch
w
indo
w
and sl
i
der button
features
to conveniently adju
st
PWM du
ty cycle
38
40
Table of Contents
Introduction to Digital Power Supply Design
2
What Is Digital Power?
3
Generic Power System Block Diagram
3
Why Digital Control Techniques?
4
Analog Controller
4
Digital Controller
4
Benefits of Digital Control
5
Analog Control System
6
Difference Equation
7
Time Sampled Systems
8
Processor Bandwidth
9
Time Division Multiplexing (TDM)
10
Digitally Controlled Power Supply
11
System Mapping
12
Tms320F280X
13
Efficient 32-Bit Processor Capability
14
DSP Core
14
Epwm “DAC” Capability
15
Control Peripherals
15
PWM Effective Resolution
15
12-Bit ADC Capability
16
Code Composer Studio
17
Project Manager
17
Software Library Approach
18
Modular Software Architecture
19
“Signal Net” Based Module Connectivity
19
Peripheral Drivers
20
Dual Buck Example
21
Software Block Execution
22
Lab1: Exploring the Development Environment
23
Simple Open-Loop Diagram
24
Scaleable PWM Peripherals
25
Epwm Module Block Diagram
26
Module Sync and Phase Control
27
Action Qualifier Module (AQM)
28
Key Features
28
Simple Waveform Construction
29
Fault Management Support
30
Trip Zones
30
Multi-Phase Interleaved (MPI)
31
Switching Requirements – MPI
32
INIT-Time
32
RUN-Time
32
Half H-Bridge (HHB)
33
Switching Requirements – HHB
34
Phase Shifted Full Bridge (PSFB)
35
Switching Requirements – PSFB
36
Software Driver Module – ZVSFB
37
Software Driver Module – PFC2PHIL
38
Lab2: PWM Generation / Open-Loop Control
39
Workshop Outline
40
Controlling the Power Stage with Feedback
41
The “Closed-Loop”
42
ADC Module Block Diagram
43
Digital Control of Power Converter
44
High Frequency PWM
46
High Resolution PWM (HRPWM)
47
PWM Period
47
Resolution Loss – Low Duty Utilization
48
Benefit of High Resolution PWM
49
Hires PWM (150Ps)
49
Regular PWM (10Ns)
49
Managing the “Closed-Loop”
50
Simple User Interface Control
51
Soft-Start and Sequencing Multi V
52
Example: Closed-Loop Control
53
Tuning the Loop for Good Transient Response
55
The Digital Control System
56
Advantages
56
Considerations
56
PID Control Review
57
Tuning the Step Response
58
Loop Tuning – Good First Step
59
PID – Intuitive / Interactive
60
Control Law Computation
61
Type II Controller
62
Digital Type II Controller
63
Type III Controller
64
Digital Type III Controller
65
2-Channel Buck EVM
66
2-Channel Buck EVM Schematic
67
Lab4: Tuning the Loop
68
Multi-Loop Control
69
PFC (2PHIL) Software Control Flow
70
DC-DC (ZVSFB) Software Control Flow
71
CPU Bandwidth Utilization
72
Summary and Conclusion
74
Workshop Topics and Exercises Review
75
C2000 Family Roadmap
78
Tms320F280Xx
79
Memory Sub-System
79
Communications Ports
79
The First Floating-Point Dscs
80
Processor Performance
80
Memory
80
C2000 Digital Power Tools
81
Vissim Graphical Programming
82
Ucd9Xxx Digital Power Controller Family
83
One-Day Training Course
84
Multi-Day Training Course
85
Internet
86
USA - Product Information Center ( PIC )
86
European Product Information Center (EPIC)
87
Other manuals for Texas Instruments C2000
User Guide
41 pages
Workshop Guide And Lab Manual
342 pages
Quick Start Guide
9 pages
4
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Texas Instruments C2000 Specifications
General
Brand
Texas Instruments
Model
C2000
Category
Microcontrollers
Language
English
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