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User's Guide

SLVU226B – October 2007 – Revised December 2007

Single-Channel, Power-Distribution Switch EVM

This user’s guide describes the TPS20xxEVM-290 and TPS20xxEVM-292 evaluation modules (EVM).

This guide contains the EVM schematics, bill of materials, assembly drawings, and top and bottom board

layouts.

Contents

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

2 Schematics and Bill of Materials ........................................................................................... 2

2.1 EVM Options ........................................................................................................ 2

2.2 Schematics .......................................................................................................... 3

2.3 Bill of Material ....................................................................................................... 5

3 Board Layout ................................................................................................................. 7

3.1 TPS20xxEVM-290 Board .......................................................................................... 7

3.2 TPS20xxEVM-292 Board .......................................................................................... 9

3.3 Layout Considerations ............................................................................................ 10

4 EVM Setup .................................................................................................................. 10

4.1 Recommended Test Equipment ................................................................................ 10

4.2 Measuring Current Limit .......................................................................................... 10

5 Related Documentation from Texas Instruments ...................................................................... 11

List of Figures

1 TPS20xxEVM-290 Schematic .............................................................................................. 3

2 TPS20xxEVM-292 Schematic .............................................................................................. 4

3 TPS20xxEVM-290 Component Placement ............................................................................... 7

4 TPS20xxEVM-290 Top-Side Layout ...................................................................................... 8

5 TPS20xxEVM-290 Bottom-Side Layout................................................................................... 8

6 TPS20xxEVM-292 Component Placement ............................................................................... 9

7 TPS20xxEVM-292 Top-Side Layout ...................................................................................... 9

8 TPS20xxEVM-292 Bottom-Side Layout ................................................................................. 10

9 EVM Setup For Measuring Current Limit ............................................................................... 11

10 TPS2051BEVM-290 Short-Circuit Output Current and OC Status .................................................. 11

List of Tables

1 TPS20xxEVM-290 Options ................................................................................................. 2

2 TPS20xxEVM-292 Options ................................................................................................. 2

3 TPS20xxEVM-290 Bill of Materials ........................................................................................ 5

4 TPS20xxEVM-292 Bill of Materials ........................................................................................ 7

SLVU226B – October 2007 – Revised December 2007 Single-Channel, Power-Distribution Switch EVM 1

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Summary of content (14 pages)

PAGE 1
User's Guide SLVU226B – October 2007 – Revised December 2007 Single-Channel, Power-Distribution Switch EVM This user’s guide describes the TPS20xxEVM-290 and TPS20xxEVM-292 evaluation modules (EVM). This guide contains the EVM schematics, bill of materials, assembly drawings, and top and bottom board layouts. 1 2 3 4 5 Contents Introduction ................................................................................................................... 2 Schematics and Bill of Materials ............
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www.ti.com Introduction 1 Introduction The TPS20xxEVM-290 and TPS20xxEVM-292 are evaluation modules (EVM) for the Texas Instruments family of single-channel, current-limited, power distribution switches. These EVMs operate over a 2.7-V to 5.5-V range and provide a continuous output current of up to 2 A (see Table 1). Test points provide convenient access to all critical node voltages.
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www.ti.com Schematics and Bill of Materials Schematics See Table 1. + 2.2 Figure 1.
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www.ti.com See Table 2. + Schematics and Bill of Materials Figure 2.
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www.ti.com Schematics and Bill of Materials 2.3 Bill of Material Table 3. TPS20xxEVM-290 Bill of Materials QTY -001 -002 -003 -004 -005 -006 -007 -008 -009 -010 -011 -012 -013 -014 -015 -016 -017 Ref Des Value Description Size Part No. MFR 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 C1 10uF Capacitor, Ceramic, 10-µF, X7R, 10V, 10% 1206 STD STD 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 C2, C3 0.
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www.ti.com Schematics and Bill of Materials Table 3. TPS20xxEVM-290 Bill of Materials (continued) QTY 6 -001 -002 -003 -004 -005 -006 -007 -008 -009 -010 -011 -012 -013 -014 -015 -016 -017 Ref Des Value Description Size Part No. MFR 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 U1 TPS2051BD IC, Current-Limited Power Distribution Switch, 5.
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www.ti.com Board Layout Table 4. TPS20xxEVM-292 Bill of Materials QTY -001 -002 -003 -004 -005 -006 -007 RefDes Value Description Size Part Number MFR 1 1 1 1 1 1 1 C1 10uF Capacitor, ceramic, 10-µF, X7R, 10V, 10% 1206 STD STD 2 2 2 2 2 2 2 C2, C3 0.
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www.ti.com Board Layout Figure 4. TPS20xxEVM-290 Top-Side Layout Figure 5.
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www.ti.com Board Layout 3.2 TPS20xxEVM-292 Board Figure 6. TPS20xxEVM-292 Component Placement Figure 7.
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www.ti.com EVM Setup Figure 8. TPS20xxEVM-292 Bottom-Side Layout 3.3 Layout Considerations The IN and OUT pins of U1 can carry significant current; so, traces to these pins should be of suitable length and width to minimize the voltage drop to the load. Locate the 0.1-µF bypass capacitors close to the IN and OUT pins of U1. 4 EVM Setup 4.
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www.ti.com Related Documentation from Texas Instruments Oscilloscope Voltage Probe Current Probe OC + IN - 5 V, 5 A + OUT - EVM 0W 7" Twisted Pair, #20 AWG Figure 9. EVM Setup For Measuring Current Limit OC lin ILIMIT Figure 10.
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www.ti.
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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.