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User's Guide

SLVU391–August 2010

TPS63030EVM-658

This user’s guide describes the characteristics, operation, and use of the TPS63030EVM-658 evaluation

module (EVM). This EVM contains the Texas Instruments TPS63030 buck-boost converter, configured

with external components to regulate current through a WLED. This user’s guide includes EVM

specifications, recommended test setup, test results, bill of materials, and a schematic diagram.

Contents

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

1.1 Performance Specification Summary ............................................................................ 2

1.2 Modifications ........................................................................................................ 2

2 TPS63030EVM-658 Setup ................................................................................................. 2

2.1 Input/Output Connections ......................................................................................... 2

3 Test Results ................................................................................................................. 3

4 Design Procedure for Divider Network ................................................................................... 3

5 Board Layout ................................................................................................................ 4

6 Schematic and Bill of Materials ........................................................................................... 6

6.1 TPS63030EVM-658 Schematic .................................................................................. 6

6.2 TPS63030EVM-658 Bill of Materials ............................................................................ 7

List of Figures

1 Efficiency vs Input Voltage................................................................................................. 3

2 Assembly Layer Including Silk Screen ................................................................................... 4

3 Top Copper Layer........................................................................................................... 5

4 Bottom Copper Layer....................................................................................................... 5

List of Tables

1 Typical Performance Specification Summary ........................................................................... 2

2 Bill of Materials .............................................................................................................. 7

SLVU391–August 2010 TPS63030EVM-658

Summary of content (9 pages)

PAGE 1
User's Guide SLVU391 – August 2010 TPS63030EVM-658 This user’s guide describes the characteristics, operation, and use of the TPS63030EVM-658 evaluation module (EVM). This EVM contains the Texas Instruments TPS63030 buck-boost converter, configured with external components to regulate current through a WLED. This user’s guide includes EVM specifications, recommended test setup, test results, bill of materials, and a schematic diagram. 1 2 3 4 5 6 Contents Introduction ..................................
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Introduction 1 www.ti.com Introduction The Texas Instruments TPS63030EVM-658 evaluation module contains a TPS63030 buck-boost converter integrated circuit (IC), supporting components, and one white light-emitting diode (WLED). The purpose of this EVM is to facilitate evaluation of the TPS63030 in a typical WLED application. 1.1 Performance Specification Summary Table 1. Typical Performance Specification Summary Parameter Min VIN 1.8 VOUT Typ Max Units 5.5 V 375 mA 3.
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Test Results www.ti.com 3 Test Results 100 95 90 Efficiency - % 85 80 75 70 65 60 55 50 2 2.5 3 3.5 4 4.5 VI - Input Voltage 5 5.5 Figure 1. Efficiency vs Input Voltage 4 Design Procedure for Divider Network The TPS63030 feedback voltage (FB) is set to 0.50 V. If this were used for current regulation, the power dissipation of the sense resistor will be high. To reduce power dissipation on the current sense resistor R3, a reference voltage of 2.
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Board Layout 5 www.ti.com Board Layout This section provides the board layout of the TPS63030EVM-658. A 2-layer PCB with a number of vias near the LED was used to help with the thermal dissipation of the WLED. Users must carefully design their system to handle the thermal challenges raised by the WLEDs. Board layout is critical for all switch-mode power supplies. See the data sheet (SLVS893) for specific layout and routing guidelines. Figure 2.
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Board Layout www.ti.com Figure 3. Top Copper Layer Figure 4.
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Schematic and Bill of Materials 6 www.ti.com Schematic and Bill of Materials TPS63030EVM-658 Schematic 6 TPS63030EVM-658 U2 1000pF Ref C4 R5 249 R2 20.0K C3 C5 10uF 10uF 1.5 uH L1 TL431AIDBZ 3.24K R1 C2 C1 10uF 10uF R6 0 R3 6.1 0.51 This section contains a schematic and bill of materials for the TPS63030EVM-658.
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Schematic and Bill of Materials www.ti.com 6.2 TPS63030EVM-658 Bill of Materials Table 2. Bill of Materials Count RefDes Value Description Size Part Number MFR 4 C1, C2, C3, C5 10uF Capacitor, Ceramic, 6.3V, X5R, 20% 0603 GRM188R60J106ME47D Murata 1 C4 1000pF Capacitor, Ceramic, 50V, X7R, 10% 0603 Std Std 1 D1 LUW CP7P LED, 350mA (see Note 5) 3.10 x 3.10 mm LUW CP7P-Kxxx-5yyy-35 Osram 1 L1 1.5 µH Inductor, Power, 3.1A, 22mΩ, ±20% 0.157 x 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.