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User's Guide

SLVU142A – July 2006 – Revised November 2006

TPS61150EVM-150 / TPS61150AEVM-150

This user's guide describes the characteristics, operation, and use of the

TPS61150EVM-150 and TPS61150AEVM-150 evaluation modules (EVM). These

EVMs contain Texas Instruments either TPS61150 or TPS61150A based power

solutions, each of which providing two independently regulated current outputs using a

single inductor step-up (boost) converter. The two current outputs are ideal for driving

WLED backlight for the sub and main displays in clam shell phones. This user's guide

includes EVM specifications, recommended test setup, test results, bill of materials

(BOM), and a schematic diagram.

Contents

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

2 Input/Output Connector Descriptions ............................................................ 3

3 Board Layout ........................................................................................ 5

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

List of Figures

1 Efficiency vs. WLED Output Current ............................................................ 4

2 Both On Efficiency vs. Total Output Current ................................................... 4

3 Top Assembly Layer ............................................................................... 5

4 Top Layer ............................................................................................ 5

5 Bottom Layer ........................................................................................ 5

6 Schematic ........................................................................................... 6

List of Tables

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

2 HPA150 Bill of Materials ........................................................................... 7

SLVU142A – July 2006 – Revised November 2006 TPS61150EVM-150 / TPS61150AEVM-150 1

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Summary of content (9 pages)

PAGE 1
User's Guide SLVU142A – July 2006 – Revised November 2006 TPS61150EVM-150 / TPS61150AEVM-150 This user's guide describes the characteristics, operation, and use of the TPS61150EVM-150 and TPS61150AEVM-150 evaluation modules (EVM). These EVMs contain Texas Instruments either TPS61150 or TPS61150A based power solutions, each of which providing two independently regulated current outputs using a single inductor step-up (boost) converter.
PAGE 2
www.ti.com Introduction 1 Introduction The Texas Instruments TPS61150EVM-150 evaluation module contains a TPS61150 IC while the TPS61150AEVM-150 evaluation module contains a TPS61150A IC. Both EVMs provide two independently regulated current outputs using a single inductor step-up (boost) converter. One output drives two parallel strings of WLEDs. One string can be configured for two or four series WLEDs. The other string has four series WLEDs.
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www.ti.com Input/Output Connector Descriptions 2 Input/Output Connector Descriptions J1–VIN This is the positive connection to the input power supply. The leads to the input supply should be twisted and kept as short as possible. J2–GND This is the return (ground) connection to the input power supply. JP1–EN LED1 Shorting this jumper ties the SEL1 pin to VIN, thereby enabling the IC to provide an output voltage and a regulated output current controlled by IFB1.
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www.ti.com Input/Output Connector Descriptions 2.1 Test Setup The TPS61150 and TPS61150A are designed to operate with a maximum input voltage of 6V. Connect a power supply set between 2.5 V and 6.0 V output voltage and current limit set to at least 1 A. Short jumper JP1 and/or JP2 to enable the boost converter. Short JP3 and open JP5 to enable LEDs D1 through D4. Short JP4 to enable LEDs D5 through D6.
PAGE 5
www.ti.com Board Layout 3 Board Layout Board layout is critical for all switch mode power supplies. Figure 3, Figure 4, and Figure 5 show the board layout for the HPA150 PWB. The switching nodes with high-frequency noise are isolated from the noise-sensitive feedback circuitry, and careful attention has been given to the routing of high-frequency current loops. See the data sheet for more specific layout guidelines. Figure 3. Top Assembly Layer Figure 4. Top Layer Figure 5.
PAGE 6
www.ti.com Bill of Materials and Schematic 4 Bill of Materials and Schematic Figure 6.
PAGE 7
www.ti.com Bill of Materials and Schematic 4.1 Bill of Materials Table 2. HPA150 Bill of Materials COUNT 00 1 00 2 REF DES 1 1 C1 1.0 µF Capacitor, Ceramic, 25 V, X5R, 10% 0603 C1608X5R1E105K TDK 1 1 C2 1.
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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.
PAGE 9
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.