Texas Instruments LP8580EVM User Manual
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Texas Instruments LP8580EVM User Manual

Texas Instruments LP8580EVM User Manual

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Using the LP8580EVM Evaluation Module
User's Guide
Windows is a registered trademark of Microsoft.
SPI is a trademark of Motorola.
All other trademarks are the property of their respective owners.
Literature Number: SNVU495
March 2016

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Summary of Contents for Texas Instruments LP8580EVM

  • Page 1 Using the LP8580EVM Evaluation Module User's Guide Literature Number: SNVU495 March 2016 Windows is a registered trademark of Microsoft. SPI is a trademark of Motorola. All other trademarks are the property of their respective owners.

  • Page 2: Table Of Contents

    Interface Setup ................... LP8580EVM Evaluation Software ................ LP8580EVM Evaluation Software Installation ......................Driver Installation ..................Evaluation Software Removal ................Using the LP8580EVM Evaluation Software ...................... Digital Input Control ....................... Interface Selection ......................Register View ....................Register Control Area ....................Direct Register Control ....................

  • Page 3: Preface

    SNVU495 – March 2016 Read This First About this Manual This user’s guide describes the characteristics, operation, and use of the LP8580EVM evaluation module. This user’s guide includes a schematic diagram and a bill of materials (BOM). Related Documentation from Texas Instruments...

  • Page 4: Introduction

    The Texas Instruments LP8580EVM evaluation module helps designers evaluate the operation and performance of LP8580 integrated circuit (IC). The LP8580EVM uses the LP8580 high-efficiency boost converter and six LED outputs to drive display backlight with local dimming capability. More information about the LP8580 capabilities can be found in the device data sheet (SNVSA65).
  • Page 5 LED4 GPU/AP LED5 HSYNC AVDD GNDs Panel VSYNC SDO/ PWM VCOMTRIM VCOM SDI/ SDA SCLK/ SCL SS/ ADDRSEL NAVDD TCON Figure 1. Typical Application SNVU495 – March 2016 LP8580 Evaluation Board Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 6: Hardware Setup

    Hardware Setup Figure 2 shows how to set up LP8580EVM. An external 2.9-V to 5-V power source must be connected to VDD input connector, and boost input voltage between 2.7 V to 27 V must be connected to the VIN connector.

  • Page 7: Buttons

    (RESET) can be used to reset the onboard microcontroller if firmware gets stuck for any reason. Indicator LED When LP8580EVM is connected to the USB port LED D201 should be blinking indicating that the firmware of the onboard microcontroller is running. If LED D201 is not blinking, check that the VCC jumper is set to the 3.3-V position or that the external power supply is connected.

  • Page 8: Lp8580Evm Evaluation Software

    LP8580EVM Evaluation Software The LP8580EVM is connected to the computer via USB. The EVM is controlled with special evaluation software. The onboard MSP430 microcontroller is used to provide easy I2C/SPI communication, as well as to control the digital inputs of the LP8580 IC. The microcontroller is powered by default from USB. The LP8580 IC is powered from external power supply.

  • Page 9: Digital Input Control

    The Addr1 button controls the state of the SS/ADDRSEL pin when LP8580EVM is set up for I2C mode. Dimming control can be used to control the SDO/PWM pin when LP8580EVM is set up for I2C mode. This can be used for PWM brightness control. The PWM frequency and duty cycle can be set, and the PWM generator can be turned on and off.

  • Page 10: Register View

    Using the LP8580EVM Evaluation Software www.ti.com Figure 6. SW SPI Settings To use the I2C interface shunts of the LP8580 must be set as shown in Figure 6 and the Interface button in the Digital control area of the evaluation software must be in an ON state. To use I2C interface with 0x2C address Addr1 button must be in OFF state.

  • Page 11: Direct Eeprom Access

    Write button. EEPROM must be unlocked before new values can be written into EEPROM. Status Bar The status bar shows if the LP8580EVM is successfully connected to a PC. It also shows the virtual COM port number, GUI build date, and other information. History Tab The LP8580 evaluation software history tab shows all the register reads and writes that have been done.
  • Page 12 Using the LP8580EVM Evaluation Software www.ti.com Figure 10. History Tab The Commands view of the history tab shows the commands that the evaluation software sends to the virtual COM port. This can be useful if one wants to automate some tests with automated test sequencers.

  • Page 13: 5.10 Menu Bar

    Using the LP8580EVM Evaluation Software www.ti.com Figure 11. Commands View 5.10 Menu Bar The LP8580 evaluation software has three items in its menu bar:File, Operations, and About. 5.10.1 File Menu The file menu has 6 menu items:Save Register Block, Load Register Block, Save All Registers, Load All Registers, Options, and Exit.
  • Page 14 Using the LP8580EVM Evaluation Software www.ti.com Figure 12. File Menu The Save Register Block option saves the register block that is selected in the register view to a text file. Selecting Save Register Block opens a Save As window which allows user to give the text file a descriptive name.
  • Page 15 Using the LP8580EVM Evaluation Software www.ti.com Figure 13. Interface Options The General options tab sets general settings for the evaluation software; these settings are set correctly by default and do not require adjusting. SNVU495 – March 2016 LP8580 Evaluation Board Submit Documentation Feedback Copyright ©...
  • Page 16 Using the LP8580EVM Evaluation Software www.ti.com Figure 14. General Options Exit closes the evaluation software. Evaluation software can also be closed by clicking the red cross button in the upper-left corner of the evaluation software. 5.10.2 Operations Menu The Operations menu has four items: SPI Slave Select, Read Register Block, Read All Registers, and Execute Macro: •...

  • Page 17: Examples

    Using PWM Brightness Control This example requires that the I2C interface is selected, and the backlight is turned ON, as described in Section 6.2: SNVU495 – March 2016 LP8580 Evaluation Board Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 18: Turning On The Vcomtrim Output

    To turn on the VCOMTRIM current source, follow the next steps. Note that an external voltage source must be connected to the NAVDD and AVDD pins of the LP8580EVM. The LP8580 supports both unipolar and bipolar voltages. More information on the VCOMTRIM can be found in the LP8580 data sheet.

  • Page 19: Saving Register Settings To A File

    1C6 0071 ;set LED2 current to 0071hex 1C8 0071 ;set LED3 current to 0071hex 1CA 0071 ;set LED4 current to 0071hex 1CC 0071 ;set LED5 current to 0071hex SNVU495 – March 2016 LP8580 Evaluation Board Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 20 PWM_BrightnessControl.txt macro file configures uniform values for LED currents and regional brightness. It turns on the backlight with PWM brightness control. Overall brightness can be controlled with the dimming control of the evaluation software. This macro requires that the LP8580EVM and software are set for I2C interface.

  • Page 21: Evaluation Board Schematic

    Evaluation Board Schematic www.ti.com Evaluation Board Schematic Figure 17. LP8580 Main Schematic SNVU495 – March 2016 LP8580 Evaluation Board Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 22 Evaluation Board Schematic www.ti.com Figure 18. Microcontroller Schematic LP8580 Evaluation Board SNVU495 – March 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 23: Bill Of Materials For Lp8580Evm

    Evaluation Board Schematic www.ti.com Bill of Materials for LP8580EVM DESIGNATOR VALUE PART NUMBER C100, C200, C201, C205, C207 10 µF EMK107BBJ106MA-T C101, C103, C104 10 µF CGA5L3X5R1H106K160AB C105, C108 4.7 µF C0603C475K8PACTU C107, C208, C212, C213, C214 0.1 µF C0603C104M4RACTU...

  • Page 24: Lp8580Evm Pcb Layout And Layers

    LP8580EVM PCB Layout and Layers www.ti.com LP8580EVM PCB Layout and Layers Figure 19. Top Layer Figure 20. Mid-Layer 1 (GND Plane) LP8580 Evaluation Board SNVU495 – March 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 25 LP8580EVM PCB Layout and Layers www.ti.com Figure 21. Mid-Layer 2 Figure 22. Bottom Layer SNVU495 – March 2016 LP8580 Evaluation Board Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 26 STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein. Acceptance of the EVM is expressly subject to the following terms and conditions.
  • Page 27 FCC Interference Statement for Class B EVM devices NOTE: 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.
  • Page 28 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの 措置を取っていただく必要がありますのでご注意ください。 1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用 いただく。 2. 実験局の免許を取得後ご使用いただく。 3. 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ ンスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル 3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧くださ い。http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page SPACER EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.
  • Page 29 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2015, Texas Instruments Incorporated...
  • Page 30 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.

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