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User's Guide

SLVU336–November 2009

TPS54226EVM-539 2-A, SWIFT

Regulator Evaluation

Module

Contents

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

1.1 Background ......................................................................................................... 2

1.2 Performance Specification Summary ............................................................................ 2

1.3 Modifications ........................................................................................................ 3

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

2.1 Input / Output Connections ....................................................................................... 3

2.2 Start Up Procedure ................................................................................................ 4

2.3 Efficiency ............................................................................................................ 4

2.4 Load Regulation .................................................................................................... 4

2.5 Line Regulation ..................................................................................................... 5

2.6 Load Transient Response ........................................................................................ 5

2.7 Output Voltage Ripple ............................................................................................. 6

2.8 Input Voltage Ripple ............................................................................................... 6

2.9 Start Up .............................................................................................................. 7

2.10 Switching Frequency .............................................................................................. 7

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

3.1 Layout ............................................................................................................... 8

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

4.1 Schematic ......................................................................................................... 12

4.2 Bill of Materials .................................................................................................... 12

4.3 Reference .......................................................................................................... 13

List of Figures

1 TPS54226EVM-539 Efficiency ............................................................................................ 4

2 TPS54226EVM-539 Load Regulation .................................................................................... 5

3 TPS54226EVM-539 Line Regulation..................................................................................... 5

4 TPS54226EVM-539 Load Transient Response......................................................................... 6

5 TPS54226EVM-539 Output Voltage Ripple ............................................................................. 6

6 TPS54226EVM-539 Input Voltage Ripple ............................................................................... 7

7 TPS54226EVM-539 Start Up.............................................................................................. 7

8 TPS54226EVM-539 Switching Frequency............................................................................... 8

9 Top Assembly ............................................................................................................... 9

10 Top Layer .................................................................................................................... 9

11 Internal Layer 1 ............................................................................................................ 10

12 Internal Layer 2 ............................................................................................................ 10

13 Bottom Layer............................................................................................................... 11

14 Bottom Assembly .......................................................................................................... 11

15 TPS54226EVM-539 Schematic Diagram............................................................................... 12

List of Tables

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SLVU336–November 2009

TPS54226EVM-539 2-A, SWIFT

Regulator Evaluation Module

Summary of content (15 pages)

PAGE 1
User's Guide SLVU336 – November 2009 TPS54226EVM-539 2-A, SWIFTTM Regulator Evaluation Module 1 2 3 4 Contents Introduction .................................................................................................................. 2 1.1 Background ......................................................................................................... 2 1.2 Performance Specification Summary ............................................................................ 2 1.3 Modifications ........
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Introduction 1 www.ti.com 1 Input Voltage and Output Current Summary ............................................................................ 2 2 TPS54226 EVM and Performance Specifications Summary .......................................................... 2 3 Output Voltages ............................................................................................................. 3 4 Connection and Test Points ................................................................................
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Test Setup and Results www.ti.com 1.3 Modifications These evaluation modules are designed to provide access to the feature of the TPS54226. Some modification can be made to this module. 1.3.1 Output Voltage Set Point To change the output voltage of the EVMs, it is necessary to change the value of resistor R1. Changing the value of R1 can change the output voltage above 0.765V. The value of R1 for a specific output voltage can be calculated using Equation 1 and Equation 2. For output voltage from 0.
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Test Setup and Results www.ti.com Table 4. Connection and Test Points 2.2 Reference Designator Function J1 VIN (see Table 1 for VIN range) J2 VOUT, 1.05 V at 2 A maximum JP1 EN control. Connect EN to OFF to disable, connect EN to ON to enable.
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Test Setup and Results www.ti.com 1 Voltage Deviation - % 0.8 0.6 VI = 5 V 0.4 VI = 12 V 0.2 0 -0.2 0 0.5 1 1.5 IO - Output Current - A 2 2.5 Figure 2. TPS54226EVM-539 Load Regulation 2.5 Line Regulation The line regulation for the TPS54226EVM-539 is shown Figure 3. 1.065 IO = 0.001 A VO - Output Voltage - V 1.06 1.055 IO = 1 A 1.05 IO = 2 A 1.045 4 8 12 VI - Input Voltage - V 16 20 Figure 3. TPS54226EVM-539 Line Regulation 2.
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Test Setup and Results www.ti.com VOUT = 50 mV/div (AC coupled) IOUT = 500 mA/div, 0.5 to 1.5 A Load Step Time = 200 ms/div Figure 4. TPS54226EVM-539 Load Transient Response 2.7 Output Voltage Ripple The TPS54226EVM-539 output voltage ripple is shown in Figure 5. The output current is the rated full load of 2A. VOUT = 20 mV/div (AC coupled) Switching Node = 5 V/div Time = 1 ms/div Figure 5. TPS54226EVM-539 Output Voltage Ripple 2.
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Test Setup and Results www.ti.com VOUT = 20 mV/div (AC coupled) Switching Node = 5 V/div Time = 1 ms/div Figure 6. TPS54226EVM-539 Input Voltage Ripple 2.9 Start Up The TPS54226EVM-539 start up waveform is shown in Figure 7. EN = 10 V/div VOUT = 500 mV/div PG = 5 V/div Time = 500 ms/div Figure 7. TPS54226EVM-539 Start Up 2.10 Switching Frequency The TPS54226EVM-539 switching frequency is shown in Figure 8.
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Board Layout www.ti.com 900 fsw - Switching Frequency - kHz IO = 1 A 800 VO = 1.8 V 700 600 VO = 3.3 V 500 0 5 10 VI - Input Voltage - V 15 20 Figure 8. TPS54226EVM-539 Switching Frequency 3 Board Layout This section provides description of the TPS54226EVM-539, board layout, and layer illustrations. 3.1 Layout The board layout for the TPS54226EVM-539 and is shown in Figure 9 through Figure 14. The top layer contains the main power traces for VIN, VO and ground.
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Board Layout www.ti.com Figure 9. Top Assembly Figure 10.
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Board Layout www.ti.com Figure 11. Internal Layer 1 Figure 12.
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Schematic, Bill of Materials and Reference www.ti.com Figure 13. Bottom Layer Figure 14. Bottom Assembly 4 Schematic, Bill of Materials and Reference This section presents the TPS54226EVM-539 schematic, bill of materials and reference.
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Schematic, Bill of Materials and Reference 4.1 www.ti.com Schematic Figure 15 is the schematic for the TPS54226EVM. Figure 15. TPS54226EVM-539 Schematic Diagram 4.
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Schematic, Bill of Materials and Reference www.ti.com Table 5. Bill of Materials RefDes QTY Value Description Size Part Number MFR C1, C3 2 10uF Capacitor, Ceramic, 25V, X5R, 20% 1210 C3225X5R1E106M TDK C11 0 Open Capacitor, Ceramic 1206 Std Std C2, C4, C8 0 Open Capacitor, Ceramic 0603 Std Std C5 1 3300pF Capacitor, Ceramic, 25V, X7R , 10% 0603 Std Std C6 1 1uF Capacitor, Ceramic, 16V, X7R, 10% 0603 Std Std C7 1 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.