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User's Guide

SLVU529A–September 2011– Revised November 2011

TPS6269xEVM-076 Evaluation Module

This user’s guide describes the characteristics, operation, and use of the TPS6269xEVM-076 evaluation

module (EVM). The TPS6269xEVM-076 is a fully assembled and tested platform for evaluating the

performance of the TPS6269x high-frequency, synchronous, step-down dc-dc converters optimized for

battery-powered portable applications. This document includes schematic diagrams, a printed circuit board

(PCB) layout, bill of materials, and test data. Throughout this document, the abbreviations EVM,

TPS6269xEVM, and the term evaluation module are synonymous with the TPS62690/1/2/3EVM-076

unless otherwise noted.

Contents

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

1.1 Features ............................................................................................................. 2

1.2 Applications ......................................................................................................... 2

1.3 EVM Ordering Options ............................................................................................ 2

2 TPS62690/1/2/3EVM Schematic .......................................................................................... 3

3 Connector and Test Point Descriptions .................................................................................. 3

3.1 Input/Output Connectors: TPS6269xEVM ...................................................................... 3

3.2 Jumpers and Switches ............................................................................................ 4

4 Test Configurations ......................................................................................................... 5

4.1 Hardware Setup .................................................................................................... 5

4.2 Procedure ........................................................................................................... 5

5 TPS62691EVM Test Data ................................................................................................. 6

5.1 Efficiency ............................................................................................................ 6

5.2 Start-up .............................................................................................................. 7

5.3 Output Voltage Ripple (Power-Save Mode) .................................................................... 8

5.4 Output Voltage Ripple (PWM) .................................................................................... 9

6 TPS62690/1/2/3EVM Assembly Drawing and Layout ................................................................ 10

7 TPS62690/1/2/3EVM Bill of Material .................................................................................... 13

8 Marking Information for this EVM ....................................................................................... 13

List of Figures

1 TPS6269xEVM Schematic................................................................................................. 3

2 JP3 and LP1 Set Up........................................................................................................ 4

3 Hardware Board Connection ............................................................................................. 5

4 Efficiency vs Load current for the TPS62691 ........................................................................... 6

5 TPS62691 Start-Up Using EN With No Load, Vin = 3.6 V and Vout = 2.2 V ...................................... 7

6 TPS62691 Start-up Using EN With 200-mA Load, Vin = 3.6 V and Vout = 2.2 V ................................. 7

7 Power-Save Mode Ripple at Vin = 3.6 V and Vout = 2.2 V With Iload = 40 mA ................................... 8

8 PWM Mode Ripple at Vin = 3.6 V and Vout = 2.2 V With Iload = 40 mA ........................................... 9

9 PWM Mode Ripple at Vin = 3.6 V and Vout = 2.2 V With Iload = 200 mA.......................................... 9

10 TPS62690/1/2/3EVM Component Placement (Top View) ........................................................... 10

11 TPS62690/1/2/3EVM Top-Side Copper (Top View) .................................................................. 11

12 TPS62690/1/2/3EVM L2-Side Copper.................................................................................. 11

13 TPS62690/1/2/3EVM L3-Side Copper.................................................................................. 12

14 TPS62690/1/2/3EVM Bottom-Side Copper (Bottom View) .......................................................... 12

SLVU529A–September 2011–Revised November 2011 TPS6269xEVM-076 Evaluation Module

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Summary of content (15 pages)

PAGE 1
User's Guide SLVU529A – September 2011 – Revised November 2011 TPS6269xEVM-076 Evaluation Module This user’s guide describes the characteristics, operation, and use of the TPS6269xEVM-076 evaluation module (EVM). The TPS6269xEVM-076 is a fully assembled and tested platform for evaluating the performance of the TPS6269x high-frequency, synchronous, step-down dc-dc converters optimized for battery-powered portable applications.
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Introduction www.ti.com List of Tables 1 1 Ordering Information for TPS62690/1/2/3EVM.......................................................................... 2 2 Bill of Material for the TPS62690/1/2/3EVM ........................................................................... 13 3 Marking Information .......................................................................................................
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TPS62690/1/2/3EVM Schematic www.ti.com 2 TPS62690/1/2/3EVM Schematic J4 J5 PSM MODE PWM Input R1 49.9 2 J1 C1 S+ 1 S- 2 150uF + C2 LP1 R2 49.9 U1 TPS6269x 2 1 VIN 2.3 - 4.8V Output JP2 A2 VIN B2 EN C2 GND MODE A1 SW B1 FB C1 L1 VOUT JP3 2 Vout 2.85V, 600mA max 1 1uH 4.
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Connector and Test Point Descriptions 3.1.7 www.ti.com J7 J7 S+/S– are the sense connections for the output of the converter. Connect a voltmeter, sense connection of an electronic load, or oscilloscope to this header. 3.1.8 J8 J8 is the return connection of the converter. A load can be connected between J8 and J6 (VOUT). 3.2 3.2.1 Jumpers and Switches JP1 – ENABLE This jumper enables/disables the converter on the EVM. Placing a shorting jumper between ENABLE and ON turns on the converter.
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Test Configurations www.ti.com 4 Test Configurations 4.1 Hardware Setup Figure 3 illustrates a typical hardware test configuration. Oscilloscope DC Power Supply + - J1 VIN J2 S+ S- J3 GND VOUT TPS6269xEVM EN ON OFF J6 S+ S- J7 GND J8 Load MODE PWM PSM JP1 JP2 Figure 3. Hardware Board Connection 4.2 Procedure Follow these procedures when configuring the EVM for testing.
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TPS62691EVM Test Data 5 www.ti.com TPS62691EVM Test Data Figure 4 through Figure 9 present typical performance graphs for the TPS62690/1/2/3EVM. Actual performance data can be affected by measurement techniques and environmental variables; therefore, these curves are presented for reference and may differ from actual results obtained by some users. 5.1 Efficiency Figure 4 shows the typical efficiency performance for the TPS62691EVM. 100 90 80 VI = 2.7 V PFM/PWM Operation Efficiency - % 70 VI = 3.
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TPS62691EVM Test Data www.ti.com 5.2 Start-up Figure 5 and Figure 6 show the typical start-up performance for different loads for the TPS62691EVM board. EN VOUT I ind t - Time - 50 ms/div Figure 5. TPS62691 Start-Up Using EN With No Load, Vin = 3.6 V and Vout = 2.2 V EN VOUT I ind t - Time - 50 ms/div Figure 6. TPS62691 Start-up Using EN With 200-mA Load, Vin = 3.6 V and Vout = 2.
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TPS62691EVM Test Data 5.3 www.ti.com Output Voltage Ripple (Power-Save Mode) Figure 7 illustrates the typical output voltage ripple for the TPS62691EVM in power-save mode. Load Current = 40 mA Power Save Mode Mode = Low VOUT SW I ind t - Time - 500 ns/div Figure 7. Power-Save Mode Ripple at Vin = 3.6 V and Vout = 2.
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TPS62691EVM Test Data www.ti.com 5.4 Output Voltage Ripple (PWM) Figure 8 and Figure 9 illustrate a typical output voltage ripple for the TPS62691 in PWM mode Load Current = 40 mA PWM Mode Mode = High VOUT SW I ind t - Time - 200 ns/div Figure 8. PWM Mode Ripple at Vin = 3.6 V and Vout = 2.2 V With Iload = 40 mA Load Current = 200 mA PWM Mode Mode = High VOUT SW I ind t - Time - 200 ns/div Figure 9. PWM Mode Ripple at Vin = 3.6 V and Vout = 2.
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TPS62690/1/2/3EVM Assembly Drawing and Layout 6 www.ti.com TPS62690/1/2/3EVM Assembly Drawing and Layout Figure 10 through Figure 14 show the design of the TPS62690/1/2/3EVM-076 printed-circuit boards (PCB). The EVM has been designed using a two-layer, 1-ounce copper-clad PCB with all components in an active area on the top side of the board. Moving components to both sides of the PCB or using additional internal layers can offer additional size reduction for space-constrained systems.
PAGE 11
TPS62690/1/2/3EVM Assembly Drawing and Layout www.ti.com Figure 11. TPS62690/1/2/3EVM Top-Side Copper (Top View) Figure 12.
PAGE 12
TPS62690/1/2/3EVM Assembly Drawing and Layout www.ti.com Figure 13. TPS62690/1/2/3EVM L3-Side Copper Figure 14.
PAGE 13
TPS62690/1/2/3EVM Bill of Material www.ti.com 7 TPS62690/1/2/3EVM Bill of Material Table 2 lists the bill of materials for the TPS6269xEVM. Table 2. Bill of Material for the TPS62690/1/2/3EVM TPS62690 TPS62691 TPS62692 TPS62693 Qty Qty Qty Qty RefDes Value Size Description Part Number 1 1 1 1 C2 (1) 4.7 µF 402 Capacitor, Ceramic, 6.3 V, X5R, 20% GRM155R60J475M 1 1 1 1 C3 (1) 10 µF 603 Capacitor, Ceramic, 6.
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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.