Texas Instruments TPS56C20, User Manual

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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 V
IN
......................................................................................................... 13
Figure 4-8. TPS56C20EVM-614 Start Up Relative to Enable................................................................................................... 13
Figure 4-9. TPS56C20EVM-614 Shut Down Relative to V
IN
.................................................................................................... 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
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