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User's Guide
TPS54231 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
2.10 Eco-mode Operation........................................................................................................................................................
Characteristics....................................................................................................................................................9
3 Board Layout.........................................................................................................................................................................
3.1
Layout...............................................................................................................................................................................11
3.2 Estimated Circuit Area.....................................................................................................................................................
Materials...........................................................................................................................................13
4.1 Schematic........................................................................................................................................................................
Materials.................................................................................................................................................................14
5 Revision History...................................................................................................................................................................
Figure 2-1. TPS54231EVM-372 Efficiency..................................................................................................................................
Figure 2-3. TPS54231EVM-372 Load Regulation.......................................................................................................................
Figure 2-4. TPS54231EVM-372 Line Regulation........................................................................................................................
Figure 2-5. TPS54231EVM-372 Transient Response.................................................................................................................
Figure 2-6. TPS54231EVM-372 Loop Response........................................................................................................................
Figure 2-7. TPS54231EVM-372 Output Ripple...........................................................................................................................
Figure 2-8. TPS54231EVM-372 Input Ripple..............................................................................................................................
Figure 2-10. TPS54231EVM-372 Start-up Relative to Enable....................................................................................................
Figure 2-11. TPS54231EVM-372 Eco-mode Operation.............................................................................................................
Figure 2-12. TPS54231EVM-372 Thermal Image.....................................................................................................................
Table 2-1. EVM Connectors and Test Points...............................................................................................................................
SLVU263A - AUGUST 2008 - REVISED OCTOBER 2021
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Table of Contents
Summary.................................................................................................................................2
List of Figures
Efficiency..............................................................................................................5
IN
Layout......................................................................................................................11
Layout................................................................................................................12
Assembly.................................................................................................................12
Schematic...............................................................................................................................14
List of Tables
Summary...............................................................................................................2
Available...........................................................................................................................................3
Materials.........................................................................................................................15
Copyright © 2021 Texas Instruments Incorporated
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Summary.........................................................................................2
TPS54231 Step-Down Converter Evaluation Module User's Guide
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Summary of Contents for Texas Instruments TPS54231
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Page 1: Table Of Contents
Table 1-3. Output Voltages Available............................3 Table 2-1. EVM Connectors and Test Points..........................Table 4-1. TPS54231EVM-372 Bill of Materials.........................15 SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021 TPS54231 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 2: Introduction
1.1 Background The TPS54231 dc/dc converter is designed to provide up to a 2 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 TPS54231. Some modifications can be made to this module. 1.3.1 Output Voltage Set Point To change the output voltage of the EVM, it is necessary to change the value of resistor R . -
Page 4: Efficiency
TPS54231EVM-372 at lower output currents between 0.02 A and 0.20 A at an ambient temperature of 25°C. TPS54231 Step-Down Converter Evaluation Module User's Guide SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021 Submit Document Feedback... -
Page 5: Output Voltage Load Regulation
Output Current (A) Figure 2-3. TPS54231EVM-372 Load Regulation Measurements are given for an ambient temperature of 25°C. SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021 TPS54231 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 at 15V input. Total peak-to-peak voltage variation is as shown, including ripple and noise on the output. Figure 2-5. TPS54231EVM-372 Transient Response TPS54231 Step-Down Converter Evaluation Module User's Guide SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021 Submit Document Feedback... -
Page 7: Loop Characteristics
= 15 V. The ripple voltage is measured directly across the output capacitors. Figure 2-7. TPS54231EVM-372 Output Ripple SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021 TPS54231 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. The input voltage for these plots is 15 V and there is no load. Figure 2-9. TPS54231EVM-372 Start-Up Relative to V TPS54231 Step-Down Converter Evaluation Module User's Guide SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021 Submit Document Feedback... -
Page 9: Eco-Mode Operation
Figure 2-10. TPS54231EVM-372 Start-up Relative to Enable 2.10 Eco-mode Operation At light load currents, the TPS54231 is designed to operate in pulse skipping Eco-mode. When the peak inductor current is lower than 100 mA typical, the device enters Eco-mode. Figure 2-11 shows Eco-mode operation, channel 1(C1) shows the output voltage while channel 2(C2) shows the switching node (PH). -
Page 10: Figure 2-12. Tps54231Evm-372 Thermal Image
Test Setup and Results www.ti.com Figure 2-12. TPS54231EVM-372 Thermal Image TPS54231 Step-Down Converter Evaluation Module User's Guide SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 11: Board Layout
, and VPHASE. Also on the top layer are connections for the remaining pins of the TPS54231 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 ten vias directly under the TPS54231 device to provide a thermal path from the top-side ground plane to the bottom-side ground plane. -
Page 12: Estimated Circuit Area
The estimated printed circuit board area for the components used in this design is 0.68 in . This area does not include test point or connectors. TPS54231 Step-Down Converter Evaluation Module User's Guide SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021 Submit Document Feedback... -
Page 13: Schematic And Bill Of Materials
This section presents the TPS54231EVM-372 schematic and bill of materials. 4.1 Schematic Figure 4-1 is the schematic for the TPS54231EVM-372. SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021 TPS54231 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 14: Bill Of Materials
Figure 4-1. TPS54231EVM-372 Schematic 4.2 Bill of Materials Table 4-1 presents the bill of materials for the TPS54231EVM-372. TPS54231 Step-Down Converter Evaluation Module User's Guide SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 15: Revision History
Updated the numbering format for tables, figures, and cross-references throughout the document....2 • Updated the user's guide title..........................SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021 TPS54231 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... - Page 16 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 17 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 18 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 19 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 20 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 21 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...
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