User’s Guide
TPS56C20 Buck Converter Evaluation Module User's
Guide
ABSTRACT
This user's guide describes the characteristics, operation, and use of the TPS56C20EVM-614 evaluation module
(EVM). The document includes performance specifications, test setup and results, the printed-circuit board
(PCB) layout, a schematic, and a bill of materials (BOM).
Table of Contents
1 Introduction.............................................................................................................................................................................3
2 Performance Specification Summary................................................................................................................................... 4
3 Modifications...........................................................................................................................................................................5
3.1 Output Voltage Set Point....................................................................................................................................................5
3.2 Output Voltage Set Point Using I2C Interface....................................................................................................................5
3.3 Output Filter and Closed Loop Response.......................................................................................................................... 8
4 Test Setup and Results.......................................................................................................................................................... 9
4.1 Input/Output Connections.................................................................................................................................................. 9
4.2 Start Up Procedure............................................................................................................................................................ 9
4.3 Efficiency..........................................................................................................................................................................10
4.4 Load Regulation............................................................................................................................................................... 11
4.5 Line Regulation.................................................................................................................................................................11
4.6 Load Transient Response................................................................................................................................................ 12
4.7 Output Voltage Ripple...................................................................................................................................................... 12
4.8 Start Up............................................................................................................................................................................ 13
4.9 Shut Down........................................................................................................................................................................14
5 Board Layout.........................................................................................................................................................................15
5.1 Board Layout....................................................................................................................................................................15
6 Schematic, Bill of Materials and Reference....................................................................................................................... 18
6.1 Schematic........................................................................................................................................................................ 18
6.2 Bill of Materials.................................................................................................................................................................19
6.3 Reference.........................................................................................................................................................................19
7 Revision History................................................................................................................................................................... 19
List of Figures
Figure 3-1. USB2ANY Connection.............................................................................................................................................. 6
Figure 3-2. TPS56X20 I2C TEST PANEL....................................................................................................................................7
Figure 3-3. EXT Power Settings.................................................................................................................................................. 7
Figure 3-4. ALL VOUTS Control.................................................................................................................................................. 8
Figure 4-1. TPS56C20EVM-614 Efficiency................................................................................................................................10
Figure 4-2. TPS56C20EVM-614 Efficiency (Low Current).........................................................................................................10
Figure 4-3. TPS56C20EVM-614 Load Regulation.....................................................................................................................11
Figure 4-4. TPS56C20EVM-614 Line Regulation...................................................................................................................... 11
Figure 4-5. TPS56C20EVM-614 Load Transient Response......................................................................................................12
Figure 4-6. TPS56C20EVM-614 Output Voltage Ripple............................................................................................................12
Figure 4-7. TPS56C20EVM-614 Start Up Relative to VIN .........................................................................................................13
Figure 4-8. TPS56C20EVM-614 Start Up Relative to Enable................................................................................................... 13
Figure 4-9. TPS56C20EVM-614 Shut Down Relative to VIN .................................................................................................... 14
Figure 4-10. TPS56C20EVM-614 Shut Down Relative to Enable............................................................................................. 14
Figure 5-1. Top Assembly.......................................................................................................................................................... 15
Figure 5-2. Top Layer.................................................................................................................................................................16
Figure 5-3. Internal Layer 1....................................................................................................................................................... 16
www.ti.com Table of Contents
SBAU227A – MARCH 2014 – REVISED JUNE 2021
Submit Document Feedback
TPS56C20 Buck Converter Evaluation Module User's Guide 1
Copyright © 2021 Texas Instruments Incorporated
