Texas Instruments TPS2640EVM, Руководство пользователя

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User’s Guide
TPS2640EVM: Evaluation Module for TPS2640
ABSTRACT
This user’s guide describes the evaluation module (EVM) for the Texas instruments TPS2640 devices. The
document provides configuration information and test setup details for working with the EVM. The EVM
schematic, board layout, and bill of materials (BOM) are also included.
Table of Contents
1 Introduction ............................................................................................................................................................................. 2
1.1 EVM Features.................................................................................................................................................................... 2
1.2 EVM Applications............................................................................................................................................................... 2
2 Description .............................................................................................................................................................................. 3
3 Schematics .............................................................................................................................................................................. 4
4 General Configurations .......................................................................................................................................................... 5
4.1 Physical Access................................................................................................................................................................. 5
4.2 Test Equipment.................................................................................................................................................................. 6
4.3 Test Setup.......................................................................................................................................................................... 7
4.4 Test Procedure................................................................................................................................................................... 8
5 EVM Board Assembly Drawings and Layout Guidelines .................................................................................................. 16
5.1 PCB Drawings.................................................................................................................................................................. 16
6 Bill Of Materials (BOM) ......................................................................................................................................................... 17
List of Figures
Figure 3-1. TPS2640EVM Schematic.......................................................................................................................................... 4
Figure 4-1. EVM Test Setup......................................................................................................................................................... 7
Figure 4-2. Output Voltage Start-Up Waveform........................................................................................................................... 9
Figure 4-3. J5/J12 = 2-3 Position, Current Limit (2.23 A), Auto-Retry Mode............................................................................. 11
Figure 4-4. J5/J12 = 1-2 Position, Current Limit (2.23 A), Latch-Off Mode................................................................................ 11
Figure 4-5. Restart From Latch-Off Mode.................................................................................................................................. 12
Figure 4-6. J5/J12 = Floating, Current Limit (2.23 A), Circuit Breaker With Auto-Retry Mode.................................................. 12
Figure 4-7. Output Short-Circuit Protection............................................................................................................................... 13
Figure 4-8. Reverse Polarity Protection..................................................................................................................................... 14
Figure 4-9. Overvoltage Clamp Response................................................................................................................................ 15
Figure 5-1. Top Side Placement................................................................................................................................................ 16
Figure 5-2. Top Layer................................................................................................................................................................. 16
Figure 5-3. Bottom Layer........................................................................................................................................................... 16
List of Tables
Table 2-1. TPS2640EVM Options and Setting............................................................................................................................. 3
Table 4-1. Input and Output Connector Functionality.................................................................................................................. 5
Table 4-2. Test Points Description............................................................................................................................................... 5
Table 4-3. Jumper and LED Descriptions.................................................................................................................................... 5
Table 4-4. Power Supply Setting for the TPS2640EVM............................................................................................................... 8
Table 4-5. Default Jumper Setting for the TPS2640EVM............................................................................................................ 8
Table 4-6. TPS2640EVM DMM Readings at Different Test Points.............................................................................................. 8
Table 4-7. TPS2640EVM Oscilloscope Setting for the Output Voltage Start-Up Test.................................................................. 9
Table 4-8. TPS2640EVM Oscilloscope Setting for the Current Limit Test................................................................................. 10
Table 4-9. TPS2640EVM Jumper Setting for Current Limits..................................................................................................... 10
Table 4-10. TPS2640EVM Output Short-Circuit Protection Test................................................................................................ 13
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SLVUBX9 – OCTOBER 2020
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