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User's Guide

SLVU208B–April 2007–Revised December 2012

TPS60250EVM-185

Contents

1 Introduction .................................................................................................................. 1

2 Setup ......................................................................................................................... 2

3 Board Layout ................................................................................................................ 6

4 Schematic and Bill of Materials ........................................................................................... 9

List of Figures

1 TPS60250 Software Screenshot.......................................................................................... 5

2 Assembly Layer ............................................................................................................. 6

3 Top Layer Routing .......................................................................................................... 7

4 Bottom Layer Routing ...................................................................................................... 8

5 TPS60250EVM-185 Schematic ........................................................................................... 9

List of Tables

1 Factory EVM Jumper Settings ............................................................................................ 4

2 TPS60250EVM-185 Bill of Materials.................................................................................... 10

1 Introduction

The Texas Instruments TPS60250EVM-185 evaluation module (EVM) helps designers evaluate the

operation and performance of the TPS60250 white LED (WLED) driver for applications that are powered

with one Li-ion or Li-polymer cell and require two or three separate banks of WLEDs. The TPS60250

contains a 1×/1.5× chargepump, as well as seven current sinks that are configured into a main display

bank of four or five WLEDs and a sub-display bank of two WLEDs. Additionally, the fifth main display

WLED can be configured to drive an aux display at up to 80 mA for backlighting a keypad or a weak

camera flash.

SLVU208B–April 2007–Revised December 2012 TPS60250EVM-185

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Summary of content (15 pages)

PAGE 1
User's Guide SLVU208B – April 2007 – Revised December 2012 TPS60250EVM-185 1 2 3 4 Contents Introduction .................................................................................................................. Setup ......................................................................................................................... Board Layout ................................................................................................................ Schematic and Bill of Materials ...
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Setup 2 www.ti.com Setup This chapter describes the jumpers and connectors on the EVM, as well as how to properly connect, set up, and use the TPS60250EVM-185. 2.1 Input/Output Connector Descriptions J1 – VIN This is the positive input voltage connection to the converter. The EVM operates from any supply voltage between 3 V and 6 V. The leads to the input supply should be twisted and kept as short as possible to minimize EMI transmission and input voltage droop.
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Setup www.ti.com JP7 – DS2 JP7 is used to connect the cathode of the DS2 LED to the DS2 pin on the TPS60250. Place a shunt on JP7 to connect the WLED to the DS2 input. Remove the shunt to measure the DS2 current or use an external WLED for DS2. 2.2 Equipment Requirements In order for this EVM to operate properly, the following components must be connected and properly configured. 2.2.1 Personal Computer A computer with a USB port is required to operate this EVM.
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Setup www.ti.com Table 1. Factory EVM Jumper Settings 2.3.1 Jumper Shunt Location JP1 Installed JP2 Installed JP3 Installed JP4 Installed JP5 Installed JP6 Installed JP7 Installed TPS6025x Software Operation The software is designed to work with the entire TPS60250/1/2 family of devices. A screenshot of the software is shown in Figure 1. Upon being opened, the software asks the user to select which particular EVM is installed.
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Setup www.ti.com Figure 1.
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Board Layout 3 www.ti.com Board Layout This chapter provides the TPS60250EVM-185 board layout and illustrations. 3.1 Layout Board layout is critical for all switch mode power supplies. Figure 2 through Figure 4 show the board layout for the TPS60250EVM-185 PCB. Figure 2.
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Board Layout www.ti.com Figure 3.
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Board Layout www.ti.com Figure 4.
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Schematic and Bill of Materials www.ti.com 4 Schematic and Bill of Materials This chapter provides the TPS60250EVM-185 schematic and bill of materials. 4.1 Schematic Figure 5.
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Schematic and Bill of Materials 4.2 www.ti.com Bill of Materials Table 2. TPS60250EVM-185 Bill of Materials Count RefDes Value Description Size 1 C1 1.0uF Capacitor, Ceramic, 25V, X5R, 10% 0603 GRM188R61E105KA12 muRata 2 C2, C3 2.2uF Capacitor, Ceramic, 10V, X5R, 10% 0603 GRM188R61A225KE34 muRata 1 C4 4.7uF Capacitor, Ceramic, 10V, X5R, 10% 0805 GRM21BR61A475KA73 muRata 7 DM1 - DM5, DS1, DS2 2 R1, R2 10.
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EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods.
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FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
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【Important Notice for Users of this Product in Japan】】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.
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EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.