Table of Contents
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User's Guide
TPS54291 Step-Down Converter Evaluation Module User's
Guide
1
Introduction.............................................................................................................................................................................2
1.1 Description.........................................................................................................................................................................
1.2
Applications........................................................................................................................................................................2
1.3 Features.............................................................................................................................................................................
2 TPS54291EVM-431 Electrical Performance Specifications................................................................................................
3
Schematic................................................................................................................................................................................4
3.1 Enable Jumpers (JP1 and JP2).........................................................................................................................................
Outputs.......................................................................................................................................................5
Descriptions.......................................................................................................................................................5
Setup................................................................................................................................................................................7
4.1 Equipment..........................................................................................................................................................................
Setup................................................................................................................................................................8
4.3 Start-Up/Shutdown Procedure...........................................................................................................................................
4.5 Control Loop Gain and Phase Measurement Procedure.................................................................................................
4.6 Equipment Shutdown.......................................................................................................................................................
5.1 Efficiency..........................................................................................................................................................................
Regulation.................................................................................................................................................11
5.3 Switch Node and Output Ripple Voltage..........................................................................................................................
Materials.....................................................................................................................................................................16
8 Revision History...................................................................................................................................................................
Figure 4-1. TPS54291EVM-431 Recommended Test Setup.......................................................................................................
Figure 4-2. Output Ripple Measurement - Tip and Barrel Using TP3 and TP4 or TP18 and TP19............................................
Figure 4-3. Control Loop Measurement Setup............................................................................................................................
Figure 5-2. TPS54291EVM-431 Output Voltage vs Load Current.............................................................................................
Figure 5-3. TPS54291EVM-431 Output Voltage Ripple............................................................................................................
Figure 6-4. TPS54291EVM-431 Bottom Copper (X-Ray View from Top)..................................................................................
Figure 6-5. TPS54291EVM-431 Internal 1 (X-Ray View from Top)...........................................................................................
Figure 6-6. TPS54291EVM-431 Internal 2 (X-Ray View from Top)...........................................................................................
Table 3-1. Test Point Descriptions...............................................................................................................................................
Trademarks
All trademarks are the property of their respective owners.
SLVU356A - JANUARY 2010 - REVISED OCTOBER 2021
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Table of Contents
Procedure..............................................................................................................10
Layout.................................................................................................................................13
List of Figures
Schematic.................................................................................................................................4
Current......................................................................................................11
Top).................................................................................................13
Top)...............................................................................................14
List of Tables
Specifications.................................................................................3
Materials.........................................................................................................................16
Copyright © 2021 Texas Instruments Incorporated
Curves......................................................................11
Top).............................................................................13
TPS54291 Step-Down Converter Evaluation Module User's Guide
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Related Manuals for Texas Instruments TPS54291
Summary of Contents for Texas Instruments TPS54291
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Page 1: Table Of Contents
Table 7-1. TPS54291EVM-431 Bill of Materials.........................16 Trademarks All trademarks are the property of their respective owners. SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 TPS54291 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 2: Introduction
The TPS54291EVM-431 is designed to use a regulated 12-V (+10% /–20%) bus to produce two regulated power rails, 3.3 V at 1.5 A and 1.2 V at 2.5 A. TPS54291EVM-431 is designed to demonstrate the TPS54291 in a typical 12-V bus system while providing a number of test points to evaluate the performance of the TPS54291 in a given application. -
Page 3: Tps54291Evm-431 Electrical Performance Specifications
– OUT1 OUT1 Operating Temperature Range = Min to Max, I = Min to Max °C SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 TPS54291 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 4: Schematic
Figure 3-1. TPS54291EVM-431 Schematic The schematic is for reference only. See Table 7-1 for specific values. TPS54291 Step-Down Converter Evaluation Module User's Guide SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 5: Enable Jumpers (Jp1 And Jp2)
3.1 Enable Jumpers (JP1 and JP2) The TPS54291EVM-431 provides separate three pin 100-mil headers and shunts for exercising the TPS54291 Enable functions. Place the JP1 shunt in the left position connects EN1 to ground and turns on Output 1 and placing the JP2 shunt in the left position connects EN2 to ground and turns on Output 2. - Page 6 Even this tip and barrel measurement technique increases the measured switch edge noise. For improved output ripple measurement, measure the output ripple at the output capacitor (C17). TPS54291 Step-Down Converter Evaluation Module User's Guide SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 Submit Document Feedback Copyright ©...
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Page 7: Test Setup
The EVM should not be left unattended while powered. The EVM should not be probed while the fan is not running. SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 TPS54291 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 8: Equipment Setup
Vout ripple LOAD2 1.2V @ 2.5A LOAD1 3.3V @ 1.5A Figure 4-1. TPS54291EVM-431 Recommended Test Setup TPS54291 Step-Down Converter Evaluation Module User's Guide SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 9: Start-Up/Shutdown Procedure
3. Vary LOAD2 from 0 Adc to 2.5 Adc. 4. Vary V from 9.6 Vdc to 13.2 Vdc. SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 TPS54291 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 10: Output Ripple Voltage Measurement Procedure
2. Shut down V 3. Shut down LOAD1. 4. Shut down LOAD2. 5. Shut down the fan. TPS54291 Step-Down Converter Evaluation Module User's Guide SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 11: Tps54291Evm-431 Typical Performance Data And Characteristic Curves
= 0 A–2.5 A OUT1 OUT1 OUT2 OUT2 Figure 5-2. TPS54291EVM-431 Output Voltage vs Load Current SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 TPS54291 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 12: Switch Node And Output Ripple Voltage
OUT2 Ch1: TP3 (VOUT1), Ch2: TP18 (VOUT2), Ch3: TP9 (SW1), Ch4: TP12 (SW2) Figure 5-3. TPS54291EVM-431 Output Voltage Ripple TPS54291 Step-Down Converter Evaluation Module User's Guide SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 13: Evm Assembly Drawings And Layout
0.86-inch × 1.28-inch active area on the top side and all active traces to the top and bottom layers to allow the user to easily view, probe, and evaluate the TPS54291 control IC in a practical double-sided application. Moving components to both sides of the PCB or using additional internal layers can offer additional size reduction for space constrained systems. -
Page 14: Figure 6-3. Tps54291Evm-431 Top Copper (Viewed From Top)
Figure 6-3. TPS54291EVM-431 Top Copper (Viewed from Top) Figure 6-4. TPS54291EVM-431 Bottom Copper (X-Ray View from Top) TPS54291 Step-Down Converter Evaluation Module User's Guide SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 15: Figure 6-5. Tps54291Evm-431 Internal 1 (X-Ray View From Top)
Figure 6-5. TPS54291EVM-431 Internal 1 (X-Ray View from Top) Figure 6-6. TPS54291EVM-431 Internal 2 (X-Ray View from Top) SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 TPS54291 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 16: List Of Materials
Updated the numbering format for tables, figures, and cross-references throughout the document....2 • Updated the user's guide title..........................• Edited the user's guide for clarity........................2 TPS54291 Step-Down Converter Evaluation Module User's Guide SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... - Page 17 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 18 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 19 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 20 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 21 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 22 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...