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User's Guide
TPS543B22EVM SWIFT Step-Down Converter Evaluation
Module
This user's guide contains information for the TPS543B22 evaluation module (BSR178) and the 20 A
DC/DC converter. Also included are the performance characteristics, schematic, and bill of materials for the
TPS543B22EVM.
1
Introduction.............................................................................................................................................................................3
1.1 Background........................................................................................................................................................................
1.2 Before You Begin...............................................................................................................................................................
1.3 Performance Characteristics Summary.............................................................................................................................
Modifications.........................................................................................................................................5
2.1 Output Voltage...................................................................................................................................................................
2.2 Switching Frequency (FSEL Pin).......................................................................................................................................
2.3 Current Limit, Soft-Start Time, and Internal Compensation (MODE Pin)...........................................................................
UVLO................................................................................................................................................................6
3 Test Setup and Results..........................................................................................................................................................
3.1 Input/Output Connections..................................................................................................................................................
3.2
Efficiency..........................................................................................................................................................................10
Regulation................................................................................................................................................11
3.4 Load Transient and Loop Response................................................................................................................................
3.5 Output Voltage Ripple......................................................................................................................................................
3.6 Input Voltage Ripple.........................................................................................................................................................
Clock..................................................................................................................................................15
3.8 Start-up and Shutdown with EN.......................................................................................................................................
3.9 Start-up and Shutdown with VIN......................................................................................................................................
Pre-Bias.....................................................................................................................................................18
3.11 Hiccup Current Limit.......................................................................................................................................................
3.12 Thermal Performance....................................................................................................................................................
Layout.........................................................................................................................................................................21
4.1 Layout..............................................................................................................................................................................
Materials...........................................................................................................................................25
5.1 Schematic........................................................................................................................................................................
Materials.................................................................................................................................................................27
6 Revision History...................................................................................................................................................................
Efficiency............................................................................................................................................................10
Figure 3-2. P2 Efficiency - Default Configuration......................................................................................................................
Figure 3-3. U1 Load Regulation ................................................................................................................................................
Figure 3-4. U1 Line Regulation .................................................................................................................................................
Figure 3-5. U2 Load Regulation ................................................................................................................................................
Figure 3-6. U2 Line Regulation .................................................................................................................................................
Response...........................................................................................................................................12
Response...........................................................................................................................................12
Figure 3-9. U1 Bode Plot...........................................................................................................................................................
Figure 3-10. U2 Bode Plot.........................................................................................................................................................
Figure 3-12. U1 Output Ripple - 20 A Load..............................................................................................................................
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ABSTRACT
Table of Contents
List of Figures
Load..................................................................................................................................13
Copyright © 2023 Texas Instruments Incorporated
TPS543B22EVM SWIFT Step-Down Converter Evaluation Module
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Related Manuals for Texas Instruments TPS543B22EVM
Summary of Contents for Texas Instruments TPS543B22EVM
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Page 1: Table Of Contents
Figure 3-11. U1 Output Ripple – No Load..........................13 Figure 3-12. U1 Output Ripple – 20 A Load..........................SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 TPS543B22EVM SWIFT Step-Down Converter Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... - Page 2 List of Tables Table 1-1. Input Voltage and Output Current Summary.......................3 Table 1-2. TPS543B22EVM Small Size (U1) Performance Characteristics Summary..............Table 1-3. TPS543B22EVM High Efficiency (U2) Performance Characteristics Summary............Table 2-1. VOUT Selection................................Table 2-2. FSEL Selection................................Table 2-3. MODE Selection.................................
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Page 3: Introduction
The following warnings and cautions are noted for the safety of anyone using or working close to the TPS543B22EVM. Observe all safety precautions. CAUTION The TPS543B22EVM can become hot during operation due to dissipation of power in some operating conditions. Avoid contact with the board. Follow all applicable safety procedures applicable to your laboratory. Caution: Hot surface. -
Page 4: Performance Characteristics Summary
Introduction www.ti.com 1.3 Performance Characteristics Summary A summary of the TPS543B22EVM performance characteristics is provided in Table 1-2 Table 1-3. The TPS543B22EVM is designed and tested for V = 4 V to 18 V. Characteristics are given for an input voltage of V = 12 V and an output voltage of 1.2 V, unless otherwise specified. -
Page 5: Configurations And Modifications
1.80 V 7 to 8 pin shorted (R19 + R13)||R20 = 1.8 kΩ 3.3 V Default Setting SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 TPS543B22EVM SWIFT Step-Down Converter Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 6: Switching Frequency (Fsel Pin)
UVLO. The undervoltage lockout (UVLO) for U1 is adjusted externally using R55 (R ) and R57 (R TPS543B22EVM SWIFT Step-Down Converter Evaluation Module SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 Submit Document Feedback... -
Page 7: Test Setup And Results
TP1 is used to monitor the output voltage of U2 with TP16 as the ground reference. If modifications are made to the TPS543B22EVM, then the input current can change. The input power supply and wires connecting the EVM to the power supply must be rated for the input current. -
Page 8: Table 3-1. Connectors And Jumpers
2-pin header to connect U4 buffer output enable to ground. Populate shunt to enable ENSYNC_P1 output of buffer. Remove shunt to make buffer output high impedance. TPS543B22EVM SWIFT Step-Down Converter Evaluation Module SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 Submit Document Feedback... -
Page 9: Table 3-2. Test Points
TP41 SYNC_P1 SYNC test point. Supply an external clock to this test point to synchronize U4 regulators. SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 TPS543B22EVM SWIFT Step-Down Converter Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 10: Efficiency
3.2 Efficiency Figure 3-1 Figure 3-2 show the efficiency for both designs on the TPS543B22EVM. The test points listed Table 3-3 are used for the efficiency measurement. Use these test points to minimize the contribution of PCB parasitic power loss to the measured power loss. -
Page 11: Output Voltage Regulation
0.995 Output Current (A) Input Voltage (V) Figure 3-6. U2 Line Regulation Figure 3-5. U2 Load Regulation SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 TPS543B22EVM SWIFT Step-Down Converter Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 12: Load Transient And Loop Response
EVM is used to provide a 10-A step. The VOUT voltage is measured using TP10 for U1 and TP29 for U2. When using the load transient circuit included on the TPS543B22EVM, slowly increase amplitude of function generator for desired load step amplitude then vary the rise and fall times for the desired slew rate. The current for the load step can be sensed with the ISNS test point. -
Page 13: Output Voltage Ripple
Figure 3-11 through U2 Output Ripple - 20A show the TPS543B22EVM output voltage ripple. The load currents are no load and 20 A. V = 12 V. The VOUT voltage is measured using TP29 for U1 and TP25 for U2. -
Page 14: Input Voltage Ripple
3.6 Input Voltage Ripple Figure 3-15 through U2 Input Ripple - 20 A Load show the TPS543B22EVM input voltage ripple. The load currents are no load and 20 A. V = 12 V. The ripple voltage is measured across C40 for U1 and measured across C13 for U2. -
Page 15: Synchronizing To A Clock
Figure 3-19. U1 and U2 Synchronized to a Clock Figure 3-20. U2 Clock Synchronization Transitions SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 TPS543B22EVM SWIFT Step-Down Converter Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 16: Start-Up And Shutdown With En
IOUT = 0A 400 s/div Figure 3-23. U2 Startup with EN – No Load and Measuring VDRV TPS543B22EVM SWIFT Step-Down Converter Evaluation Module SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 17: Start-Up And Shutdown With Vin
IOUT = 10A 2 ms/div Figure 3-24. U2 Start-up with VIN Figure 3-25. U2 Shutdown with VIN SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 TPS543B22EVM SWIFT Step-Down Converter Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 18: Start-Up Into Pre-Bias
VOUT (500mV/div) PGOOD (5V/div) VIN=12V IOUT = 0A 400 s/div Figure 3-26. U2 Start-up Into 0.5-V Pre-Bias TPS543B22EVM SWIFT Step-Down Converter Evaluation Module SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 19: Hiccup Current Limit
4ms/div Figure 3-28. U2 Output Overcurrent Protection – Figure 3-27. U1 Output Overcurrent Protection – Overload Overload SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 TPS543B22EVM SWIFT Step-Down Converter Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 20: Thermal Performance
Figure 3-31. U1 Thermal Performance – Both 20-A Figure 3-32. U2 Thermal Performance – Both 20-A Load Load TPS543B22EVM SWIFT Step-Down Converter Evaluation Module SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 21: Board Layout
Board Layout 4 Board Layout This section provides a description of the TPS543B22EVM board layout and layer illustrations. 4.1 Layout The board layout for the TPS543B22EVM is shown in Figure 4-1 through Figure 4-12. The top-side layer of the EVM is laid out in a manner typical of a user application. -
Page 22: Figure 4-1. Top Overlay
Figure 4-1. Top Overlay Figure 4-2. Top Solder Figure 4-3. Top Layer Figure 4-4. Signal 1 TPS543B22EVM SWIFT Step-Down Converter Evaluation Module SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 23: Figure 4-5. Signal 2
Board Layout Figure 4-5. Signal 2 Figure 4-6. Signal 3 Figure 4-7. Signal 4 Figure 4-8. Bottom Solder SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 TPS543B22EVM SWIFT Step-Down Converter Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 24: Figure 4-9. Bottom Overlay
Figure 4-10. Bottom Layer Figure 4-9. Bottom Overlay Figure 4-11. Drill Drawing Figure 4-12. Board Dimensions TPS543B22EVM SWIFT Step-Down Converter Evaluation Module SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 25: Schematic And Bill Of Materials
Schematic and Bill of Materials 5 Schematic and Bill of Materials This section presents the TPS543B22EVM schematic and bill of materials. 5.1 Schematic Figure 5-1 is the schematic for U1. Figure 5-2 is the schematic for U2. TP29 VOUT_P1 49.9... -
Page 26: Figure 5-2. U2 Schematic
To provide a 50% load step, adjust high level of PGND FGEN input until ISNS high level measures VO2_PGND 2ND_PGND 500mV PGND Figure 5-2. U2 schematic TPS543B22EVM SWIFT Step-Down Converter Evaluation Module SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 27: Bill Of Materials
Schematic and Bill of Materials 5.2 Bill of Materials Table 5-1 presents the bill of materials for the TPS543B22EVM. Table 5-1. TPS543B22EVM Bill of Materials Designator Quantity Value Description Package Reference Part Number Manufacturer !PCB1 Printed Circuit Board BSR178 C1, C9, C11 220 µF... -
Page 28: Revision History
Revision History www.ti.com Table 5-1. TPS543B22EVM Bill of Materials (continued) Designator Quantity Value Description Package Reference Part Number Manufacturer 1.37k RES, 1.37 k, 1%, 0.1 W, 0603 RC0603FR-071K37L Yageo 17.4k RES, 17.4 k, 1%, 0.1 W, 0603 RC0603FR-0717K4L Yageo 11.8k RES, 11.8 k, 1%, 0.1 W, 0603... - Page 29 Changes from Revision * (September 2022) to Revision A (January 2023) Page • First public release............................. SLUUCH6B – SEPTEMBER 2022 – REVISED SEPTEMBER 2023 TPS543B22EVM SWIFT Step-Down Converter Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 30 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 31 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 32 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 33 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 34 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 © 2023, Texas Instruments Incorporated...
- Page 35 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 © 2023, Texas Instruments Incorporated...