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User's Guide
TPS54331 Step-Down Converter Evaluation Module User's
Guide
1
Introduction.............................................................................................................................................................................2
1.1 Background........................................................................................................................................................................
1.3 Modifications......................................................................................................................................................................
2 Test Setup and Results..........................................................................................................................................................
2.1 Input / Output Connections................................................................................................................................................
2.2
Efficiency............................................................................................................................................................................4
2.3 Output Voltage Load Regulation........................................................................................................................................
2.4 Output Voltage Line Regulation.........................................................................................................................................
Transients..................................................................................................................................................................6
2.6 Loop Characteristics..........................................................................................................................................................
2.7 Output Voltage Ripple........................................................................................................................................................
2.8 Input Voltage Ripple...........................................................................................................................................................
Up.......................................................................................................................................................................8
Layout.........................................................................................................................................................................10
3.1 Layout..............................................................................................................................................................................
Materials...........................................................................................................................................12
4.1 Schematic........................................................................................................................................................................
Materials.................................................................................................................................................................13
5 Revision History...................................................................................................................................................................
Figure 2-1. TPS54331 Efficiency.................................................................................................................................................
Figure 2-3. TPS54331 Load Regulation......................................................................................................................................
Figure 2-4. TPS54331 Line Regulation.......................................................................................................................................
Figure 2-5. TPS54331 Transient Response................................................................................................................................
Figure 2-6. TPS54331 Loop Response.......................................................................................................................................
Figure 2-7. TPS54331 Output Ripple..........................................................................................................................................
Figure 2-8. TPS54331 Input Ripple.............................................................................................................................................
Figure 2-9. TPS54331 Start-Up Relative to Vin...........................................................................................................................
Figure 2-10. TPS5331 Start-up Relative to Enable.....................................................................................................................
Figure 3-1. Top-Side Layout......................................................................................................................................................
Figure 3-2. Bottom-Side Layout (Looking From Top
Figure 3-3. Top-Side Assembly..................................................................................................................................................
Table 2-1. EVM Connectors and Test Points...............................................................................................................................
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SLVU247A - JULY 2008 - REVISED OCTOBER 2021
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Table of Contents
Summary.................................................................................................................................2
List of Figures
Efficiency.............................................................................................................................5
Side).........................................................................................................11
Schematic...............................................................................................................................12
List of Tables
Summary...............................................................................................................2
Available...........................................................................................................................................3
Materials.........................................................................................................................13
Copyright © 2021 Texas Instruments Incorporated
Summary..................................................................................2
TPS54331 Step-Down Converter Evaluation Module User's Guide
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Table of Contents
Related Manuals for Texas Instruments TPS54331
Summary of Contents for Texas Instruments TPS54331
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Page 1: Table Of Contents
Figure 2-6. TPS54331 Loop Response............................Figure 2-7. TPS54331 Output Ripple............................Figure 2-8. TPS54331 Input Ripple............................. Figure 2-9. TPS54331 Start-Up Relative to Vin........................... Figure 2-10. TPS5331 Start-up Relative to Enable........................Figure 3-1. Top-Side Layout..............................Figure 3-2. Bottom-Side Layout (Looking From Top Side)......................11... -
Page 2: Introduction
1.1 Background The TPS54331 dc/dc converter is designed to provide up to a 3-A output from an input voltage source of 3.5 V to 28 V. Rated input voltage and output current range for the evaluation module are given in Table 1-1. -
Page 3: Modifications
Introduction 1.3 Modifications These evaluation modules are designed to provide access to the features of the TPS54331. Some modifications can be made to this module. 1.3.1 Output Voltage Set Point To change the output voltage of the EVMs, it is necessary to change the value of resistor R6. Changing the value of R6 can change the output voltage above 0.8 V. -
Page 4: Test Setup And Results
= 21 V = 28 V I - Output Current - A Figure 2-1. TPS54331 Efficiency TPS54331 Step-Down Converter Evaluation Module User's Guide SLVU247A – JULY 2008 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 5: Output Voltage Load Regulation
I - Output Current - A Figure 2-3. TPS54331 Load Regulation Measurements are given for an ambient temperature of 25°C. SLVU247A – JULY 2008 – REVISED OCTOBER 2021 TPS54331 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 6: Output Voltage Line Regulation
75% of maximum rated load. Total peak-to-peak voltage variation is as shown, including ripple and noise on the output. Output Current t - Time - 200 s/div Figure 2-5. TPS54331 Transient Response TPS54331 Step-Down Converter Evaluation Module User's Guide SLVU247A – JULY 2008 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 7: Loop Characteristics
3 A. Voltage is measured directly across output capacitors. t - Time - 1 s/div Figure 2-7. TPS54331 Output Ripple SLVU247A – JULY 2008 – REVISED OCTOBER 2021 TPS54331 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 8: Input Voltage Ripple
0.8 V and the output voltage ramps up to the externally set value of 3.3 V. t - Time - 5 ms/div Figure 2-9. TPS54331 Start-Up Relative to Vin TPS54331 Step-Down Converter Evaluation Module User's Guide SLVU247A – JULY 2008 – REVISED OCTOBER 2021 Submit Document Feedback Copyright ©... -
Page 9: Figure 2-10. Tps5331 Start-Up Relative To Enable
Test Setup and Results t - Time - 5 ms/div Figure 2-10. TPS5331 Start-up Relative to Enable SLVU247A – JULY 2008 – REVISED OCTOBER 2021 TPS54331 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 10: Board Layout
The top layer contains the main power traces for VIN, OUT, and VPHASE. Also on the top layer are connections for the remaining pins of the TPS54331 and a large area filled with ground. The bottom layer contains ground and a signal route for the BOOT capacitor. The top and bottom and internal ground traces are connected with multiple vias placed around the board including four vias directly under the TPS54331 device to provide a thermal path from the top-side ground traces to the bottom-side ground plane. -
Page 11: Figure 3-2. Bottom-Side Layout
Board Layout Figure 3-2. Bottom-Side Layout (Looking From Top Side) Figure 3-3. Top-Side Assembly SLVU247A – JULY 2008 – REVISED OCTOBER 2021 TPS54331 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 12: Schematic And Bill Of Materials
This section presents the TPS54331EVM-232 schematic and bill of materials. 4.1 Schematic Figure 4-1 is the schematic for the TPS54331EVM-232. Figure 4-1. TPS54331EVM-232 Schematic TPS54331 Step-Down Converter Evaluation Module User's Guide SLVU247A – JULY 2008 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 13: Bill Of Materials
Updated the numbering format for tables, figures, and cross-references throughout the document....2 • Updated the user's guide title..........................SLVU247A – JULY 2008 – REVISED OCTOBER 2021 TPS54331 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... - Page 14 STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
- Page 15 www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
- Page 16 www.ti.com Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
- Page 17 www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
- Page 18 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2019, Texas Instruments Incorporated...
- Page 19 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2021, Texas Instruments Incorporated...