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User's Guide

SLVU279 – December 2008

TPS54617EVM-414 6-A, SWIFT™ Regulator Evaluation

Module

Contents

1 Introduction ................................................................................................................... 2

2 Test Setup and Results ..................................................................................................... 3

3 Board Layout ................................................................................................................. 8

4 Schematic and Bill of Materials ........................................................................................... 11

List of Figures

1 TPS54617EVM-414 Efficiency ............................................................................................. 4

2 TPS54617EVM-414 Load Regulation ..................................................................................... 5

3 TPS54617EVM-414 Line Regulation ...................................................................................... 5

4 TPS54617EVM-414 Transient Response ................................................................................ 6

5 TPS54617EVM-414 Loop Response...................................................................................... 6

6 TPS54617EVM-414 Output Ripple ........................................................................................ 7

7 TPS54617EVM-414 Input Ripple .......................................................................................... 7

8 TPS54617EVM-414 Start-up Relative to Input Voltage ................................................................ 8

9 TPS54617EVM-414 Top-Side Layout ..................................................................................... 9

10 TPS54617EVM-414 Another Layer ....................................................................................... 9

11 TPS54617EVM-414 And Another Layer ................................................................................ 10

12 TPS54617EVM-414 Bottom-Side Layout ............................................................................... 10

13 TPS54617EVM-414 Top-Side Assembly................................................................................ 11

14 TPS54617EVM-414 Schematic .......................................................................................... 12

List of Tables

1 Input Voltage and Output Current Summary ............................................................................. 2

2 TPS54617EVM-414 Performance Specification Summary ............................................................. 2

3 Output Voltages Available .................................................................................................. 3

4 EVM Connectors and Test Points ......................................................................................... 4

5 TPS54617EVM-414 Bill of Materials ..................................................................................... 13

SWIFT is a trademark of Texas Instruments.

SLVU279 – December 2008 TPS54617EVM-414 6-A, SWIFT™ Regulator Evaluation Module 1

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Summary of content (15 pages)

PAGE 1
User's Guide SLVU279 – December 2008 TPS54617EVM-414 6-A, SWIFT™ Regulator Evaluation Module 1 2 3 4 Contents Introduction ................................................................................................................... 2 Test Setup and Results ..................................................................................................... 3 Board Layout .................................................................................................................
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Introduction 1 www.ti.com Introduction This user's guide contains background information for the TPS54617 as well as support documentation for the TPS54617EVM-414 evaluation module (HPA414). Also included are the performance specifications, the schematic, and the bill of materials for the TPS54617EVM-414. 1.1 Background The TPS54617 dc/dc converter is designed to provide up to a 6 A output from an input voltage source of 3 V to 6 V.
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Test Setup and Results www.ti.com 1.3 Modifications These evaluation modules are designed to provide access to the features of the TPS54617. 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 R2. Changing the value of R2 can change the output voltage above 0.891 V. The value of R2 for a specific output voltage can be calculated using Equation 1. R2 = 10 kW ´ 0.891 V VOUT - 0.
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Test Setup and Results www.ti.com Table 4. EVM Connectors and Test Points Reference Designator 2.2 Function J1 Sync input. J2 VOUT, 3.3 V at 2 A maximum J3 VIN (see Table 1 for VIN range) J4 2-pin header for enable. Connect SS/ENA to ground to disable, open to enable. TP1 Output voltage test point at OUT connector TP2 VIN test point at VIN connector TP3 Test point between voltage divider network and output. Used for loop response measurements.
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Test Setup and Results www.ti.com 2.3 Output Voltage Load Regulation The load regulation for the TPS54617EVM-414 is shown in Figure 2. 0.4 0.35 0.3 Percent Deviation - % 0.25 0.2 VI = 3.3 V VI = 3 V 0.15 0.1 0.05 0 -0.05 -0.1 -0.15 -0.2 VI = 5 V VI = 6 V fs = 1600 kHz o TA = 25 C VO = 1.8 V -0.25 -0.3 -0.35 -0.4 0 1 2 3 4 5 6 IO − Output Current − A Figure 2. TPS54617EVM-414 Load Regulation Measurements are given for an ambient temperature of 25°C. 2.
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Test Setup and Results 2.5 www.ti.com Load Transients The TPS54617EVM-414 response to load transients is shown in Figure 4. The current step (displayed at 2 A / div) is from 25% to 75% of maximum rated load (1.5 to 4.5 A) at 5 V input. Total peak-to-peak voltage variation is as shown, including ripple and noise on the output. VO − Output Voltage − 10 mV/div VI = 5 V VO = 1.8 V t − Time − 5 ms/div Figure 4. TPS54617EVM-414 Transient Response 2.
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Test Setup and Results www.ti.com 2.7 Output Voltage Ripple VI = 5 V VO = 1.8 V fs = 1600 kHz IO = 6 A Phase Voltage − 2 V/div Output Ripple Voltage − 10 mV/div The TPS54617EVM-414 output voltage ripple is shown in Figure 6. The output current is the rated full load of 6 A and VIN = 5 V. The ripple voltage is measured directly across the output capacitors. t − Time − 1 ms/div Figure 6. TPS54617EVM-414 Output Ripple 2.8 Input Voltage Ripple fs = 1600 kHz IO = 6 A VI = 5 V VO = 1.
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Board Layout 2.9 www.ti.com Powering Up The start-up waveforms are shown in Figure 8. The top trace shows VIN, and the bottom trace shows VOUT. The top trace shows EN (enable) whereas the bottom trace shows VOUT. The input voltage is initially applied and the output is inhibited by using a jumper at J2 to tie EN to GND. When the jumper is removed, EN is released. When the EN voltage reaches the enable-threshold voltage of 1.
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Board Layout www.ti.com Figure 9. TPS54617EVM-414 Top-Side Layout Figure 10.
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Board Layout www.ti.com Figure 11. TPS54617EVM-414 And Another Layer Figure 12.
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Schematic and Bill of Materials www.ti.com Figure 13. TPS54617EVM-414 Top-Side Assembly 3.2 Estimated Circuit Area The estimated printed circuit board area for the components used in this design is 0.55 in2. This area does not include test point or connectors. 4 Schematic and Bill of Materials This section presents the TPS54617EVM-414 schematic and bill of materials.
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Schematic and Bill of Materials 4.1 www.ti.com Schematic + Figure 14 is the schematic for the TPS54617EVM-414. Figure 14.
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Schematic and Bill of Materials www.ti.com 4.2 Bill of Materials Table 5 presents the bill of materials for the TPS54617EVM-414. Table 5. TPS54617EVM-414 Bill of Materials Count RefDes Description Size Part Number MFR Shunt, 100-mil, Black 0.100 929950-00 3M 22 µF Capacitor, Ceramic, 6.3V, X5R, 10% 1210 GRM32DR60J22KA0 1 Murata C10 150 pF Capacitor, Ceramic, 50V, NPO, 5% 0603 Std Std C13 Open Capacitor, Interference Suppression, xx µF, 275 VAC 0.
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EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.