Texas Instruments TPS53128, User Manual

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User’s Guide
TPS53128 Buck Controller Evaluation Module User's
Guide
ABSTRACT
The TPS53128EVM-620 evaluation module presents an easy-to-use reference design for a common dual-output
power supply using the TPS53128 controller in cost-sensitive applications.
Table of Contents
1 Introduction ............................................................................................................................................................................. 3
1.1 Description......................................................................................................................................................................... 3
1.2 Application.......................................................................................................................................................................... 3
1.3 Features............................................................................................................................................................................. 3
2 Electrical Performance Specifications ................................................................................................................................. 4
3 Schematics .............................................................................................................................................................................. 5
4 Connector and Test Point Descriptions ................................................................................................................................ 6
4.1 Enable Switches (SW1 and SW2)...................................................................................................................................... 6
4.2 Switching Frequency Select Switch (SW3)........................................................................................................................ 6
4.3 Test Point Descriptions....................................................................................................................................................... 6
5 Test Setup ................................................................................................................................................................................ 8
5.1 Equipment.......................................................................................................................................................................... 8
5.2 Recommended Setup........................................................................................................................................................ 8
6 Test Procedure ...................................................................................................................................................................... 10
6.1 Start-Up Procedure.......................................................................................................................................................... 10
6.2 Line/Load Regulation and Efficiency Measurement Procedure....................................................................................... 10
6.3 Output Ripple Voltage Measurement Procedure.............................................................................................................. 10
6.4 Shutdown Procedure........................................................................................................................................................ 10
7 Performance Data and Typical Characteristic Curves ....................................................................................................... 11
7.1 Efficiency.......................................................................................................................................................................... 11
7.2 Line and Load Regulation................................................................................................................................................. 11
7.3 Output Voltage Ripple...................................................................................................................................................... 12
7.4 Switch Node Waveforms.................................................................................................................................................. 12
8 EVM Assembly Drawings and Layout ................................................................................................................................. 13
9 Bill of Materials ..................................................................................................................................................................... 17
10 Revision History ................................................................................................................................................................. 18
List of Figures
Figure 3-1. TPS53128EVM-620 Schematic................................................................................................................................. 5
Figure 4-1. Tip and Barrel Measurement for Output Voltage Ripple............................................................................................ 7
Figure 5-1. TPS53128EVM-620 Recommended Test Setup....................................................................................................... 9
Figure 7-1. Efficiency vs Load.................................................................................................................................................... 11
Figure 7-2. Efficiency vs Load.................................................................................................................................................... 11
Figure 7-3. Output Voltage vs Load........................................................................................................................................... 11
Figure 7-4. Output Voltage vs Load........................................................................................................................................... 11
Figure 7-5. Output Voltage Ripple............................................................................................................................................. 12
Figure 7-6. Output Voltage Ripple............................................................................................................................................. 12
Figure 7-7. Switching Waveform................................................................................................................................................ 12
Figure 7-8. Switching Waveform................................................................................................................................................ 12
Figure 8-1. Top Assembly.......................................................................................................................................................... 13
Figure 8-2. Bottom Assembly.................................................................................................................................................... 14
Figure 8-3. Top Layer................................................................................................................................................................. 14
Figure 8-4. Bottom Layer........................................................................................................................................................... 15
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SLVU433A – FEBRUARY 2011 – REVISED JANUARY 2022
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