Practical Comparisons of 3 different DC-DC Control Modes

Certain end-equipment, like communications, server, industrial, and personal electronics have design challenges solved by the DC/DC converter’s control-mode. This session will compare and contrast 3 different devices using 3 different control modes under the same design criteria to see how each control mode solves particular size, efficiency, external component, ripple and transient response design challenges.

1. Control Mode Comparision
2. Product Comparison
3. Topology Comparison
4. Design Parameters
5. Switching Frequency Considerations
6. Inductor Selection
7. Output Capacitor Selection
8. Series Capacitor Selection
9. Capacitor self heating
10. Compensation network selection for the TPS54824
11. Solution Comparison
12. Closed Loop Analysis
13. Transient Response
14. Output Ripple and Jitter
15. Efficiency
16. Thermals
17. Solutions Size Comparison
18. Cost Compsarison
19. Summary

Additional information

Specific Parts Discussed:

-TPS54824, TPS54A20, TPS56C215

TI Designs

-PMP11438 - Three Different Buck Converter Circuits to Convert 12V to 1.2V at >6A Load

-PMP15008 - Tiny, Low Profile 10 A Point-of-load Voltage Regulator Reference Design

-PMP15018 - Power Reference Design With Dual VOUT of 1.2V@10A and 1V@10A

Other Trainings

-Fixed Frequency Control vs COT Control

-Survey of Control Topologies

-Designing with TI's Series Capacitor Buck Converter

1. Control Mode Comparision

This section will cover compare the 3 different control mode chosen

#		Title	Duration	Overview
1.1		Practical Comparisons of DC/DC Control Modes - Control Mode Overview Part 3 of 21 part series. This section will compare the 3 different control modes used in this comparison	01:59	Part 3 of 21 part series. This section will compare the 3 different control modes used in this comparison

2. Product Comparison

This section will compare the 3 different products used

#		Title	Duration	Overview
2.1		Practical Comparisons of DC/DC Control Modes - Product Comparison Part 4 of 21 part series. This section will compare the 3 different DCDC converters chosen for this comparison	02:19	Part 4 of 21 part series. This section will compare the 3 different DCDC converters chosen for this comparison

3. Topology Comparison

This section will compare the 2 different topologies chosen for this comparison

#		Title	Duration	Overview
3.1		Practical Comparisons of DC/DC Control Modes - Topology Comparison Part 5 of 21 part series. This section will review the 2 different DCDC toplogies used in this comparison	01:13	Part 5 of 21 part series. This section will review the 2 different DCDC toplogies used in this comparison

4. Design Parameters

This section will review the design parameters used

#		Title	Duration	Overview
4.1		Practical Comparisons of DC/DC Control Modes - Design Requirements Part 6 of a 21 part series. This section will review the design parameters used in this head to head comparison	01:30	Part 6 of a 21 part series. This section will review the design parameters used in this head to head comparison

5. Switching Frequency Considerations

This section will cover issue to consider when choosing your switching frequency

#		Title	Duration	Overview
5.1		Practical Comparisons of DC/DC Control Modes - Switching Frequency Considerations Part 7 of a 21 part series. This section will cover the consideration when choosing your switching frequency	02:35	Part 7 of a 21 part series. This section will cover the consideration when choosing your switching frequency

6. Inductor Selection

This section will cover thing to consider when choosing your output inductor

#		Title	Duration	Overview
6.1		Practical Comparisons of DC/DC Control Modes - Inductor Selection Part 8 of a 21 part series. This section will cover thing to consider when selection your output inductor	02:25	Part 8 of a 21 part series. This section will cover thing to consider when selection your output inductor

7. Output Capacitor Selection

This section will cover thing to consider when choosing your output capacitor

#		Title	Duration	Overview
7.1		Practical Comparisons of DC/DC Control Modes - Output Capacitor Selection Part 9 of a 21 part series. This section will cover the selection of the output capacitor	03:52	Part 9 of a 21 part series. This section will cover the selection of the output capacitor

8. Series Capacitor Selection

This section will cover the selection of the series capacitor for the TPS54A20

#		Title	Duration	Overview
8.1		Practical Comparisons of DC/DC Control Modes - TPS54A20 series capacitor selection Part 10 of a 21 part series. This section will cover the selection of the series capacitor for the TPS54A20	01:12	Part 10 of a 21 part series. This section will cover the selection of the series capacitor for the TPS54A20

9. Capacitor self heating

This section will cover the effect of capacitor self heating on your DCDC design.

#		Title	Duration	Overview
9.1		Practical Comparisons of DC/DC Control Modes - Capacitor Self Heating Part 11 of a 21 part series. This section will cover the effect of capacitor self heating on your design.	02:07	Part 11 of a 21 part series. This section will cover the effect of capacitor self heating on your design.

10. Compensation network selection for the TPS54824

This section will cover selection of the compensation components for the TPS54824

#		Title	Duration	Overview
10.1		Practical Comparisons of DC/DC Control Modes - Compensation calculations for the TPS54824 Part 12 of a 21 part series. This section will cover selection of the compensation components for the TPS54824	02:17	Part 12 of a 21 part series. This section will cover selection of the compensation components for the TPS54824

11. Solution Comparison

This section will compare the schematics and components chosen for the 3 solutions used in this comparison

#		Title	Duration	Overview
11.1		Practical Comparisons of DC/DC Control Modes - Solution Comparison Part 13 of a 21 part series. This section will compare the schematics and components chosen for the 3 solutions used in this comparison.	03:02	Part 13 of a 21 part series. This section will compare the schematics and components chosen for the 3 solutions used in this comparison.

12. Closed Loop Analysis

This section will compare the closed loop analysis of the 3 different solutions.

#		Title	Duration	Overview
12.1		Practical Comparisons of DC/DC Control Modes - Closed loop analysis Part 14 of a 21 part series. This section will compare the closed loop analysis of the 3 different solutions.	01:30	Part 14 of a 21 part series. This section will compare the closed loop analysis of the 3 different solutions.

13. Transient Response

This section will compare the transient response of the 3 solutions.

#		Title	Duration	Overview
13.1		Practical Comparisons of DC/DC Control Modes - Transient Response Part 15 of a 21 part series. This section will compare the transient response of the 3 solutions.	01:09	Part 15 of a 21 part series. This section will compare the transient response of the 3 solutions.

14. Output Ripple and Jitter

This section will compare the out put ripple and jitter for the 3 different solutions

#		Title	Duration	Overview
14.1		Practical Comparisons of DC/DC Control Modes - Output Ripple & Jitter Part 16 of a 21 part series. This section will compare the out put ripple and jitter for the 3 different solutions.	02:25	Part 16 of a 21 part series. This section will compare the out put ripple and jitter for the 3 different solutions.

15. Efficiency

This section will compare the efficiency results for each of the 3 solutions

#		Title	Duration	Overview
15.1		Practical Comparisons of DC/DC Control Modes - Efficiency Part 17 of a 21 part series. This section will compare the efficiency results for each of the 3 solutions.	02:06	Part 17 of a 21 part series. This section will compare the efficiency results for each of the 3 solutions.

16. Thermals

This section will compare the thermal images and results for the 3 solutions tested.

#		Title	Duration	Overview
16.1		Practical Comparisons of DC/DC Control Modes - Thermal Comparison Part 18 of a 21 part series. This section will compare the thermal images for the 3 solutions.	01:33	Part 18 of a 21 part series. This section will compare the thermal images for the 3 solutions.

17. Solutions Size Comparison

This section will compare the size of the solution for the 3 different designs.

#		Title	Duration	Overview
17.1		Practical Comparisons of DC/DC Control Modes - Solution Size Comparison Part 19 of a 21 part series. This section will compare the solution size for each design.	01:13	Part 19 of a 21 part series. This section will compare the solution size for each design.

18. Cost Compsarison

This section will compare the bill of material cost for each solution used.

#		Title	Duration	Overview
18.1		Practical Comparisons of DC/DC Control Modes - Cost Comparison Part 20 of a 21 part series. This section will compare the bill of material cost for the 3 solutions.	03:43	Part 20 of a 21 part series. This section will compare the bill of material cost for the 3 solutions.

19. Summary

Summary of the testing results

#		Title	Duration	Overview
19.1		Practical Comparisons of DC/DC Control Modes - Summary Comparisons of DC/DC control modes - Summary	01:41	Comparisons of DC/DC control modes - Summary