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User's Guide
TPS54521 Step-Down Converter Evaluation Module User's
Guide
1
Introduction.............................................................................................................................................................................3
1.1 Background........................................................................................................................................................................
1.3 Modifications......................................................................................................................................................................
2 Test Setup and Results..........................................................................................................................................................
2.1 Input / Output Connections................................................................................................................................................
2.2
Efficiency............................................................................................................................................................................6
2.3 Output Voltage Load Regulation........................................................................................................................................
2.4 Output Voltage Line Regulation.........................................................................................................................................
Transients..................................................................................................................................................................8
2.6 Loop Characteristics..........................................................................................................................................................
2.7 Output Voltage Ripple........................................................................................................................................................
2.8 Input Voltage Ripple...........................................................................................................................................................
Up.....................................................................................................................................................................10
Characteristics..................................................................................................................................................11
Layout.........................................................................................................................................................................13
3.1 Layout..............................................................................................................................................................................
3.2 Estimated Circuit Area.....................................................................................................................................................
Materials...........................................................................................................................................15
4.1 Schematic........................................................................................................................................................................
Materials.................................................................................................................................................................17
5 Revision History...................................................................................................................................................................
Figure 2-1. TPS54521EVM-607 Efficiency..................................................................................................................................
Figure 2-3. TPS54521EVM-607 Load Regulation.......................................................................................................................
Figure 2-4. TPS54521EVM-607 Line Regulation........................................................................................................................
Figure 2-5. TPS54521EVM-607 Transient Response.................................................................................................................
Figure 2-6. TPS54521EVM-607 Loop Response........................................................................................................................
Figure 2-7. TPS54521EVM-607 Output Ripple...........................................................................................................................
Figure 2-8. TPS54521EVM-607 Input Ripple..............................................................................................................................
Figure 2-11. TPS54521EVM-607 Overcurrent Hiccup Mode.....................................................................................................
Figure 2-13. TPS54521EVM-607 Junction Temperature vs Load Current................................................................................
Figure 3-4. TPS54521EVM-607 Bottom-Side Layout (Bottom View)........................................................................................
SLVU379A - AUGUST 2010 - REVISED AUGUST 2021
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Table of Contents
Summary.................................................................................................................................3
Operation..............................................................................................................................11
List of Figures
Efficiency..............................................................................................................6
IN
Enable..................................................................................................10
Image......................................................................................................................11
View)....................................................................................................13
View).......................................................................................................13
View).......................................................................................................14
Assembly.................................................................................................................14
Schematic...............................................................................................................................16
List of Tables
Summary...............................................................................................................3
Available...........................................................................................................................................4
Copyright © 2021 Texas Instruments Incorporated
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Summary.........................................................................................3
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Related Manuals for Texas Instruments TPS54521EVM-607
Summary of Contents for Texas Instruments TPS54521EVM-607
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Page 1: Table Of Contents
Figure 2-10. TPS54521EVM-607 Start-Up Relative to Enable....................10 Figure 2-11. TPS54521EVM-607 Overcurrent Hiccup Mode..................... Figure 2-12. TPS54521EVM-607 Thermal Image........................11 Figure 2-13. TPS54521EVM-607 Junction Temperature vs Load Current................Figure 3-1. TPS54521EVM-607 Top-Side Layout (Top View)....................13 Figure 3-2. TPS54521EVM-607 Layer 2 (X-Ray Top View).......................13 Figure 3-3. - Page 2 Trademarks www.ti.com Table 2-1. EVM Connectors and Test Points..........................Table 4-1. TPS54521EVM-607 Bill of Materials.........................17 Trademarks All trademarks are the property of their respective owners. TPS54521 Step-Down Converter Evaluation Module User's Guide SLVU379A – AUGUST 2010 – REVISED AUGUST 2021 Submit Document Feedback Copyright ©...
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Page 3: Introduction
The power stage input (PVIN) is rated for 1.6 V to 17 V while the control input (VIN) is rated for 4.5 to 17 V. The TPS54521EVM-607 provides both inputs but is designed and tested using the PVIN connected to VIN. -
Page 4: Modifications
ENFALLING ç ÷ è ø ENRISING R1 V ´ ENFALLING R2 = R1 I STOP ENFALLING TPS54521 Step-Down Converter Evaluation Module User's Guide SLVU379A – AUGUST 2010 – REVISED AUGUST 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 5: Test Setup And Results
PVIN input, if desired. 2 Test Setup and Results This section describes how to properly connect, set up, and use the TPS54521EVM-607 evaluation module. The section also includes test results typical for the evaluation module and covers efficiency, output voltage regulation, load transients, loop response, output ripple, input ripple, and start-up. -
Page 6: Efficiency
V = 17 V I - Output Current - A Figure 2-1. TPS54521EVM-607 Efficiency Figure 2-2 shows the efficiency for the TPS54521EVM-607 at lower output currents below 0.10 A at an ambient temperature of 25°C. V = 17 V V = 15 V... -
Page 7: Output Voltage Load Regulation
Test Setup and Results 2.3 Output Voltage Load Regulation Figure 2-3 shows the load regulation for the TPS54521EVM-607. 0.05 V = 12 V 0.04 V = 8 V 0.03 0.02 V = 10 V 0.01 V = 15 V V = 17 V -0.01... -
Page 8: Load Transients
2.5 Load Transients Figure 2-5 shows the TPS54521EVM-607 response to load transients. The current step is from 2 A to 4 A at 12 V input. Total peak-to-peak voltage variation is as shown, including ripple and noise on the output. -
Page 9: Output Voltage Ripple
2.8 Input Voltage Ripple Figure 2-8 shows the TPS54521EVM-607 input voltage ripple. The output current is the rated full load of 5 A and = 12 V. The ripple voltage is measured directly across the input capacitors. Vout = 200 mV / div (AC coupled) -
Page 10: Powering Up
2.9 Powering Up Figure 2-9 Figure 2-10 show the start-up waveforms for the TPS54521EVM-607. In Figure 2-9, the output voltage ramps up as soon as the input voltage reaches the UVLO threshold as set by the R1 and R2 resistor divider network. -
Page 11: Hiccup Overcurrent Mode Operation
2.11 Thermal Characteristics This section shows a thermal image of the TPS54521EVM-607 running at 12 V input and 5 A load and a graph showing the junction temperature vs. output current of the EVM circuit. There is no air flow and the ambient temperature is 25°C. -
Page 12: Figure 2-13. Tps54521Evm-607 Junction Temperature Vs Load Current
Ta = room temperature no airflow 0 0.5 Load Current - A Figure 2-13. TPS54521EVM-607 Junction Temperature vs Load Current TPS54521 Step-Down Converter Evaluation Module User's Guide SLVU379A – AUGUST 2010 – REVISED AUGUST 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 13: Board Layout
Board Layout 3 Board Layout This section provides a description of the TPS54521EVM-607, board layout, and layer illustrations. 3.1 Layout The board layout for the TPS54521EVM-607 is shown in Figure 3-1 through Figure 3-5. The topside layer of the EVM is laid out in a manner typical of a user application. -
Page 14: Estimated Circuit Area
Board Layout www.ti.com Figure 3-3. TPS54521EVM-607 Layer 3 (X-Ray Top Figure 3-4. TPS54521EVM-607 Bottom-Side Layout View) (Bottom View) Figure 3-5. TPS54521EVM-607 Top-Side Assembly 3.2 Estimated Circuit Area The estimated printed circuit board area for the components used in this design is 246 in (0.38 mm... -
Page 15: Schematic And Bill Of Materials
Schematic and Bill of Materials 4 Schematic and Bill of Materials This section presents the TPS54521EVM-607 schematic and bill of materials. 4.1 Schematic Figure 4-1 is the schematic for the TPS54521EVM-607. SLVU379A – AUGUST 2010 – REVISED AUGUST 2021... -
Page 16: Figure 4-1. Tps54521Evm-607 Schematic
Schematic and Bill of Materials www.ti.com Figure 4-1. TPS54521EVM-607 Schematic TPS54521 Step-Down Converter Evaluation Module User's Guide SLVU379A – AUGUST 2010 – REVISED AUGUST 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 17: Bill Of Materials
Schematic and Bill of Materials 4.2 Bill of Materials Table 4-1 presents the bill of materials for the TPS54521EVM-607. Table 4-1. TPS54521EVM-607 Bill of Materials COUNT REFDES VALUE DESCRIPTION SIZE PART NUMBER 10 µF Capacitor, Ceramic, 25 V, X5R, 20% 1210 4.7 µF... - Page 18 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 19 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 20 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 21 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 22 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 23 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products.IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2021, Texas Instruments Incorporated...