Texas Instruments TPS54231, Руководство пользователя

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User’s Guide
TPS54231 Step-Down Converter Evaluation Module User's
Guide
Table of Contents
1 Introduction ............................................................................................................................................................................. 2
1.1 Background........................................................................................................................................................................ 2
1.2 Performance Specification Summary................................................................................................................................. 2
1.3 Modifications...................................................................................................................................................................... 3
2 Test Setup and Results .......................................................................................................................................................... 3
2.1 Input / Output Connections................................................................................................................................................ 3
2.2 Efficiency............................................................................................................................................................................ 4
2.3 Output Voltage Load Regulation........................................................................................................................................ 5
2.4 Output Voltage Line Regulation......................................................................................................................................... 6
2.5 Load Transients.................................................................................................................................................................. 6
2.6 Loop Characteristics.......................................................................................................................................................... 7
2.7 Output Voltage Ripple........................................................................................................................................................ 7
2.8 Input Voltage Ripple........................................................................................................................................................... 8
2.9 Powering Up....................................................................................................................................................................... 8
2.10 Eco-mode Operation........................................................................................................................................................ 9
2.11 Thermal Characteristics.................................................................................................................................................... 9
3 Board Layout ......................................................................................................................................................................... 11
3.1 Layout............................................................................................................................................................................... 11
3.2 Estimated Circuit Area..................................................................................................................................................... 12
4 Schematic and Bill of Materials ........................................................................................................................................... 13
4.1 Schematic........................................................................................................................................................................ 13
4.2 Bill of Materials................................................................................................................................................................. 14
5 Revision History ................................................................................................................................................................... 15
List of Figures
Figure 2-1. TPS54231EVM-372 Efficiency.................................................................................................................................. 4
Figure 2-2. TPS54231EVM-372 Low Current Efficiency.............................................................................................................. 5
Figure 2-3. TPS54231EVM-372 Load Regulation....................................................................................................................... 5
Figure 2-4. TPS54231EVM-372 Line Regulation........................................................................................................................ 6
Figure 2-5. TPS54231EVM-372 Transient Response................................................................................................................. 6
Figure 2-6. TPS54231EVM-372 Loop Response........................................................................................................................ 7
Figure 2-7. TPS54231EVM-372 Output Ripple........................................................................................................................... 7
Figure 2-8. TPS54231EVM-372 Input Ripple.............................................................................................................................. 8
Figure 2-9. TPS54231EVM-372 Start-Up Relative to V
IN
........................................................................................................... 8
Figure 2-10. TPS54231EVM-372 Start-up Relative to Enable.................................................................................................... 9
Figure 2-11. TPS54231EVM–372 Eco–mode Operation............................................................................................................. 9
Figure 2-12. TPS54231EVM-372 Thermal Image..................................................................................................................... 10
Figure 3-1. TPS54231EVM-372 Top-Side Layout...................................................................................................................... 11
Figure 3-2. TPS54231EVM-372 Bottom-Side Layout................................................................................................................ 12
Figure 3-3. TPS54231EVM-372 Top-Side Assembly................................................................................................................. 12
Figure 4-1. TPS54231EVM-372 Schematic............................................................................................................................... 14
List of Tables
Table 1-1. Input Voltage and Output Current Summary............................................................................................................... 2
Table 1-2. TPS54231EVM-372 Performance Specification Summary......................................................................................... 2
Table 1-3. Output Voltages Available........................................................................................................................................... 3
Table 2-1. EVM Connectors and Test Points............................................................................................................................... 4
Table 4-1. TPS54231EVM-372 Bill of Materials......................................................................................................................... 15
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SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021
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