Texas Instruments TPS54290, Руководство пользователя

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User’s Guide
TPS54291 Step-Down Converter Evaluation Module User's
Guide
Table of Contents
1 Introduction ............................................................................................................................................................................. 2
1.1 Description......................................................................................................................................................................... 2
1.2 Applications........................................................................................................................................................................ 2
1.3 Features............................................................................................................................................................................. 2
2 TPS54291EVM-431 Electrical Performance Specifications ................................................................................................ 3
3 Schematic ................................................................................................................................................................................ 4
3.1 Enable Jumpers (JP1 and JP2)......................................................................................................................................... 5
3.2 Error Amplifier Outputs....................................................................................................................................................... 5
3.3 Test Point Descriptions....................................................................................................................................................... 5
4 Test Setup ................................................................................................................................................................................ 7
4.1 Equipment.......................................................................................................................................................................... 7
4.2 Equipment Setup................................................................................................................................................................ 8
4.3 Start-Up/Shutdown Procedure........................................................................................................................................... 9
4.4 Output Ripple Voltage Measurement Procedure.............................................................................................................. 10
4.5 Control Loop Gain and Phase Measurement Procedure................................................................................................. 10
4.6 Equipment Shutdown....................................................................................................................................................... 10
5 TPS54291EVM-431 Typical Performance Data and Characteristic Curves ...................................................................... 11
5.1 Efficiency.......................................................................................................................................................................... 11
5.2 Line and Load Regulation................................................................................................................................................. 11
5.3 Switch Node and Output Ripple Voltage.......................................................................................................................... 12
6 EVM Assembly Drawings and Layout ................................................................................................................................. 13
7 List of Materials ..................................................................................................................................................................... 16
8 Revision History ................................................................................................................................................................... 16
List of Figures
Figure 3-1. TPS54291EVM-431 Schematic................................................................................................................................. 4
Figure 4-1. TPS54291EVM-431 Recommended Test Setup....................................................................................................... 8
Figure 4-2. Output Ripple Measurement – Tip and Barrel Using TP3 and TP4 or TP18 and TP19............................................ 9
Figure 4-3. Control Loop Measurement Setup............................................................................................................................ 9
Figure 5-1. TPS54291EVM-431 Efficiency vs Load Current...................................................................................................... 11
Figure 5-2. TPS54291EVM-431 Output Voltage vs Load Current............................................................................................. 11
Figure 5-3. TPS54291EVM-431 Output Voltage Ripple............................................................................................................ 12
Figure 6-1. TPS54291EVM-431 Component Placement (Viewed from Top)............................................................................. 13
Figure 6-2. TPS54291EVM-431 Silkscreen (Viewed from Top)................................................................................................. 13
Figure 6-3. TPS54291EVM-431 Top Copper (Viewed from Top)............................................................................................... 14
Figure 6-4. TPS54291EVM-431 Bottom Copper (X-Ray View from Top).................................................................................. 14
Figure 6-5. TPS54291EVM-431 Internal 1 (X-Ray View from Top)........................................................................................... 15
Figure 6-6. TPS54291EVM-431 Internal 2 (X-Ray View from Top)........................................................................................... 15
List of Tables
Table 2-1. TPS54291EVM-431 Electrical and Performance Specifications................................................................................. 3
Table 3-1. Test Point Descriptions............................................................................................................................................... 5
Table 7-1. TPS54291EVM-431 Bill of Materials......................................................................................................................... 16
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