Texas Instruments TPS54320 User Manual

Step-down converter evaluation module

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User's Guide

TPS54320 Step-Down Converter Evaluation Module User's

Guide

Introduction.............................................................................................................................................................................2

1.1 Background........................................................................................................................................................................

1.2 Performance Specification

1.3 Modifications......................................................................................................................................................................

2 Test Setup and Results..........................................................................................................................................................

2.1 Input / Output Connections................................................................................................................................................

2.2

Efficiency............................................................................................................................................................................5

2.3 Output Voltage Load Regulation........................................................................................................................................

2.4 Output Voltage Line Regulation.........................................................................................................................................

2.5 Load

Transients..................................................................................................................................................................7

2.6 Loop Characteristics..........................................................................................................................................................

2.7 Output Voltage Ripple........................................................................................................................................................

2.8 Input Voltage Ripple...........................................................................................................................................................

2.9 Powering

Up.......................................................................................................................................................................9

2.10 Thermal Characteristics.................................................................................................................................................

3 Board Layout.........................................................................................................................................................................

3.1

Layout...............................................................................................................................................................................11

3.2 Estimated Circuit Area.....................................................................................................................................................

4 Schematic and Bill of

Materials...........................................................................................................................................14

4.1 Schematic........................................................................................................................................................................

4.2 Bill of

Materials.................................................................................................................................................................15

5 Revision History...................................................................................................................................................................

Figure 2-1. TPS54320 Efficiency.................................................................................................................................................

Figure 2-2. TPS54320 Low Current

Figure 2-3. TPS54320 Load Regulation......................................................................................................................................

Figure 2-4. TPS54320 Line Regulation.......................................................................................................................................

Figure 2-5. TPS54320 Transient Response................................................................................................................................

Figure 2-6. TPS54320 Loop Response.......................................................................................................................................

Figure 2-7. TPS54320 Output Ripple..........................................................................................................................................

Figure 2-8. TPS54320 Input Ripple.............................................................................................................................................

Figure 2-9. TPS54320 Start-Up Relative to V

Figure 2-10. TPS54320 Start-Up Relative to

Figure 2-11. TPS54320 Thermal

Figure 3-1. TPS54320 Top-Side

Figure 3-2. TPS54320 Bottom-Side

Figure 3-3. TPS54320 Top-Side

Figure 4-1. TPS54320EVM-513

Table 1-1. Input Voltage and Output Current

Table 1-2. TPS54320 Performance Specification

Table 1-3. Output Voltages

Table 2-1. EVM Connectors and Test Points...............................................................................................................................

Table 4-1. TPS54320 Bill of

Trademarks

All trademarks are the property of their respective owners.

SLVU380A - SEPTEMBER 2010 - REVISED OCTOBER 2021

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Summary.................................................................................................................................2

List of Figures

Efficiency.............................................................................................................................5

..........................................................................................................................

Enable...................................................................................................................9

Image.....................................................................................................................................10

Layout.....................................................................................................................................11

Layout...............................................................................................................................12

Assembly................................................................................................................................13

Schematic...............................................................................................................................14

List of Tables

Summary...............................................................................................................2

Summary........................................................................................................2

Available...........................................................................................................................................3

Materials........................................................................................................................................15

TPS54320 Step-Down Converter Evaluation Module User's Guide

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Summary of Contents for Texas Instruments TPS54320

Page 1: Table Of Contents
Figure 2-4. TPS54320 Line Regulation............................Figure 2-5. TPS54320 Transient Response..........................Figure 2-6. TPS54320 Loop Response............................Figure 2-7. TPS54320 Output Ripple............................Figure 2-8. TPS54320 Input Ripple............................. Figure 2-9. TPS54320 Start-Up Relative to V .......................... Figure 2-10. TPS54320 Start-Up Relative to Enable........................9 Figure 2-11. TPS54320 Thermal Image.............................10...
Page 2: 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 TPS54320 provides both inputs but is designed and tested using the PVIN connected to VIN.
Page 3: Modifications
The EVM is set for a slow start time of 3.5 msec using C7 = 0.01 μF. 1.3.3 Track In The TPS54320 can track an external voltage during start up. The J5 connector is provided to allow connection to that external voltage. Ratio-metric or simultaneous tracking can be implemented using resistor divider R5 and R6.
Page 4: Test Setup And Results
JP1. Two input voltages, which could be at different voltages, must then be provided at both J1 and J2. 2 Test Setup and Results This section describes how to properly connect, set up, and use the TPS54320 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 5: Efficiency
V = 17 V Load Current - A Figure 2-1. TPS54320 Efficiency Figure 2-2 shows the efficiency for the TPS54320 at lower output currents below 0.20 A at an ambient temperature of 25°C. V = 10 V V = 8 V...
Page 6: Output Voltage Load Regulation
Test Setup and Results www.ti.com 2.3 Output Voltage Load Regulation Figure 2-3 shows the load regulation for the TPS54320. 0.05 0.04 0.03 0.02 = 10 V 0.01 = 12 V = 8 V -0.01 = 15 V -0.02 = 17 V -0.03...
Page 7: Load Transients
2.5 Load Transients Figure 2-5 shows the TPS54320 response to load transients. The current step is from 25% to 50% of maximum rated load at 12 V input. Total peak-to-peak voltage variation is as shown, including ripple and noise on the output.
Page 8: Output Voltage Ripple
2.7 Output Voltage Ripple Figure 2-7 shows the TPS54320 output voltage ripple. The output current is the rated full load of 3 A and = 12 V. The ripple voltage is measured directly across the output capacitors with a low inductance probe.
Page 9: Powering Up
2.9 Powering Up Figure 2-9 Figure 2-10 show the start-up waveforms for the TPS54320. 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 10: Thermal Characteristics
2.10 Thermal Characteristics This section shows a thermal image of the TPS54320 running at 12 V input and 3 A load. there is no air flow and the ambient temperature is 25°C. The peak temperature of the IC (59.5°C) is well below the maximum recommended operating condition listed in the data sheet of 150°C.
Page 11: Board Layout
, and VPHASE. Also on the top layer are connections for the remaining pins of the TPS54320 and a large area filled with ground. The bottom ground layer contains a ground plane only. The top side ground traces are connected to the bottom ground plane with multiple vias placed around the board including nine vias directly under the TPS54320 device to provide a thermal path from the top-side ground plane to the bottom-side ground plane.
Page 12: Figure 3-2. Tps54320 Bottom-Side Layout
Board Layout www.ti.com Figure 3-2. TPS54320 Bottom-Side Layout TPS54320 Step-Down Converter Evaluation Module User's Guide SLVU380A – SEPTEMBER 2010 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
Page 13: Estimated Circuit Area
The estimated printed circuit board area for the components used in this design is 0.35 in (227 mm ). This area does not include test point or connectors. SLVU380A – SEPTEMBER 2010 – REVISED OCTOBER 2021 TPS54320 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
Page 14: Schematic And Bill Of Materials
Schematic and Bill of Materials www.ti.com 4 Schematic and Bill of Materials This section presents the TPS54320 schematic and bill of materials. 4.1 Schematic Figure 4-1 is the schematic for the TPS54320. Figure 4-1. TPS54320EVM-513 Schematic TPS54320 Step-Down Converter Evaluation Module User's Guide SLVU380A –...
Page 15: Bill Of Materials
Schematic and Bill of Materials 4.2 Bill of Materials Table 4-1 presents the bill of materials for the TPS54320. Table 4-1. TPS54320 Bill of Materials Count RefDes Value Description Size Part Number C2, C3 4.7µF Capacitor, Ceramic, 25V, X5R, 10% 0805 0.015µF...
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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