Texas Instruments LP8864 User Manual Download Page 10 | Manualshive

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3 LP8864EVM Board Layout

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illustrate the EVM board layout.

Figure 3-1. LP8864EVM Layout - Top

Figure 3-2. LP8864EVM Layout - Bottom

LP8864EVM Board Layout

10

LP8864 Evaluation Module

SNVU731 – NOVEMBER 2020

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Copyright © 2020 Texas Instruments Incorporated

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Summary of Contents for LP8864

Page 1: ... 2 1 1 Features 2 1 2 Applications 2 2 Test Setup 3 2 1 LP8864EVM Kit 3 2 2 System and Equipment Requirements 3 2 3 Hardware Setup 4 2 4 Software Installation 4 2 5 Quick Start Up Procedure 5 2 6 Additional GUI Functions 7 2 7 Instructions for Standalone Evaluation 9 3 LP8864EVM Board Layout 10 4 LP8864EVM Schematic 11 5 LP8864EVM Bill of Materials 12 6 LED Load Board 14 Trademarks All trademarks ...

Page 2: ...e or PWM input 1 1 Features The EVM has the following features Up to 48 V VOUT boost controller Four high precision current sinks Supports built in phase shift PWM dimming hybrid dimming current dimming and direct PWM dimming mode LED brightness controlled globally through I2C interface or PWM input Extensive fault diagnostics 1 2 Applications Backlight for Automotive infotainment Automotive instr...

Page 3: ...ble USB cable LP8864EVM LP886X LEDLOAD EVM Figure 2 1 LP8864EVM Kit 2 2 System and Equipment Requirements DC power supply 24 V or higher 6 A or higher LED cable 5 position ribbon cable PC to run GUI software GUI software www ti com Test Setup SNVU731 NOVEMBER 2020 Submit Document Feedback LP8864 Evaluation Module 3 Copyright 2020 Texas Instruments Incorporated ...

Page 4: ... the LP8864EVM to the LP886X LEDLOAD EVM with a 5 position ribbon cable Figure 2 2 LP8864EVM Hardware Setup 2 4 Software Installation Download the GUI software from the LP8864EVM tools folder Follow the instructions to finish the GUI installation Once installed a shortcut to the GUI is found on the desktop and also in the start up menu under the Texas Instruments folder Test Setup www ti com 4 LP8...

Page 5: ...igure 2 3 There should be a Hardware Connected message on the status bar next to the button If it shows Hardware not Connected click the button to manually connect the hardware This button can be used to connect or disconnect the GUI to the hardware during the evaluation Besides the connection status button the device should be enabled to be connected to the GUI Ensure the Enable button on the LED...

Page 6: ...ntrol page the user can control all the register based control functions of the device like brightness control current control sloper control dither control boost synchronization configuration and spread spectrum configuration Figure 2 5 LP8864EVM LED Control Page Test Setup www ti com 6 LP8864 Evaluation Module SNVU731 NOVEMBER 2020 Submit Document Feedback Copyright 2020 Texas Instruments Incorp...

Page 7: ...or Faults page see Figure 2 6 the user has access to LP8864 Q1 fault status bits Faults can be cleared by software by clicking the Clear All button Fault interrupt can be enabled or disabled globally by toggling the Interrupt All button Besides that each fault interrupt and each fault status can be controlled individually Figure 2 6 LP8864EVM Monitor Faults Page www ti com Test Setup SNVU731 NOVEM...

Page 8: ... brightness path is driving to OUT1 4 output VBOOST_STATUS 11 bit boost voltage code that adaptive voltage control loop sending to analog boost block AUTO_PWM_FREQ_SEL LED PWM frequency value from PWM_SEL resistor detection AUTO_LED_STRING_CFG LED string configuration from LED_SET resistor detection AUTO_BOOST_FREQ_SEL boost switching frequency value from PWM_FSET resistor detection MODE_SEL LED d...

Page 9: ... of all the registers can be updated together by clicking the WRITE ALL REGISTERS button Figure 2 8 LP8864EVM Register Map Page 2 7 Instructions for Standalone Evaluation The LP8864EVM can be used for standalone evaluation without GUI software and PC connection To support standalone mode it must be modified from its default settings as described in the following list 1 Mount R20 to pull up EN inpu...

Page 10: ...illustrate the EVM board layout Figure 3 1 LP8864EVM Layout Top Figure 3 2 LP8864EVM Layout Bottom LP8864EVM Board Layout www ti com 10 LP8864 Evaluation Module SNVU731 NOVEMBER 2020 Submit Document Feedback Copyright 2020 Texas Instruments Incorporated ...

Page 11: ...k R20 DNP 10 0k R25 DNP 10 0k R19 10 0k R26 DNP SYNC PWM 10 0k R18 2 26k R27 2 26k R29 20 5k R13 76 8k R11 15A F1 0 02 R3 0 02 R15 EN 10 0k R23 0 R8 2 2uH L1 FB1 4 7µF C16 0 01uF C18 4 7µF C17 0 01uF C19 10nF C6 10nF C7 33uF C14 10nF C8 10nF C9 33uF C15 FB2 10nF C22 GND VBOOST 0 R33 0 R2 0 R5 4 7µF C20 4 7µF C21 5 1 R1 DNP J5 GNDin VBAT MAX 5A FB3 VDD S 3 S 4 22µH L2 GND 1nF C34 DNP 1nF C38 DNP 1n...

Page 12: ... CAP CERM 1 uF 25 V 20 X7R AEC Q200 Grade 1 1206_190 1206_190 D1 1 100V FSV10100V Fairchild Semiconductor Diode Schottky 100 V 10 A AEC Q101 TO 277A TO 277A D2 D3 D4 3 Super Red VLMS20J2L1 GS08 Vishay Semiconductor LED Super Red SMD 2 2x1 3x1 4mm F1 1 0679L9150 01 Bel Fuse FUSE BRD MNT 15A 125VAC VDC 2410 FB1 1 50 ohm BLM31SN500SZ1L MuRata Ferrite Bead 50 ohm 100 MHz 12 A 1206 1206 FB2 FB3 2 560 o...

Page 13: ...k 1 0 1 W AEC Q200 Grade 0 0603 0603 R31 1 11 0k RMCF0603FT11K0 Stackpole Electronics Inc RES 11 0 k 1 0 1 W AEC Q200 Grade 0 0603 0603 R32 1 20 8k RT0603BRD0720K8L Yageo America RES 20 8 k 0 1 0 1 W 0603 0603 U1 1 LP8864QDCPRQ1 Texas Instruments Automotive display LED backlight with Four 200 mA channels HTSSOP38 U2 1 TPS7B8250QKVURQ1 Texas Instruments Automotive 300 mA high voltage ultra low Iq l...

Page 14: ...D49B 2 4 D50B 2 4 D51B 2 4 D52B 2 4 D53B 2 4 D54B 2 4 D55B 2 4 D56B 2 4 D57B 2 4 D58B 2 4 D59B 2 4 D60B J138 J137 J140 J139 J142 J141 J144 J143 J146 J145 J148 J147 J150 J149 J152 J151 J154 J153 J156 J155 J158 J157 J160 J159 J162 J161 J164 J163 J166 J165 J168 J167 J170 J169 J172 J171 J134 J133 J136 J135 1 3 5 D61A 2 4 D61B 1 3 5 D62A 1 3 5 D63A 1 3 5 D64A 1 3 5 D65A 1 3 5 D66A 1 3 5 D67A 1 3 5 D68A...

Page 15: ...J174 J215 133 TSW 102 07 G S Samtec Header 100mil 2x1 Gold TH 2x1 Header J2 1 TSW 107 07 G S Samtec Header 100mil 7x1 Gold TH 7x1 Header J6 J8 J42 J44 J48 J50 J84 J86 J91 J93 J127 J129 J133 J135 J169 J171 J175 J177 J211 J213 J216 J218 J252 J254 120 TSW 101 07 G S Samtec Header 100mil 1pos Gold TH Testpoint J89 1 TSW 105 07 G S Samtec Header 100mil 5x1 Gold TH 5x1 Header R1 R2 R3 R4 R5 R6 6 CRCW120...

Page 16: ...other than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control techniques are used to the extent TI deems necessary TI does not test all parameters of each EVM User s claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects...

Page 17: ... 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 However there is no guarantee that interference will not occur in a particular installation...

Page 18: ...y for convenience and should be verified by User 1 Use EVMs 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 1 of Article 6 of the Ministry s Rule for Enforcement of Radio Law of Japan 2 Use EVMs only after User obtains the license of Test Radio Station as provided in R...

Page 19: ... any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard User assumes all responsibility and liability for any improper or unsafe handling or use of the EVM by User or its employees affiliates contractors or designees 4 4 User assumes all...

Page 20: ...OR DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthermore no return of EVM s will be accepted if the package has been opened and no return of the EVM s will be accepted if they are damaged or otherwise not in a resalable condition If User feels it has...

Page 21: ...se resources are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for...

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