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Introduction

2

SNVU558 – February 2017

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Copyright © 2017, Texas Instruments Incorporated

The LP8863EVM Evaluation Module

1

Introduction

TI's LP8863-Q1 evaluation module (EVM) helps designers evaluate the operation and performance of the
LP8863-Q1 automotive LED backlight driver. The device offers configurability and can be set up through
external resistor options for boost switching frequency, LED current, and PWM out frequency. Internal
register options enable various controls such as brightness inputs, slope control, dimming options, etc.
The EVM contains one LP8863-Q1 LED driver with boost circuit and a Tiva Launchpad evaluation circuit
to provide control signals for LED driver.

Table 1.

LED DRIVER

IC

PACKAGE

U8

LP8863-Q1

HTSSOP

Figure 1. LP8863-Q1 Evaluation Board (Top View)

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Содержание LP8863EVM

Страница 1: ...iptions 4 2 2 LP8863EVM Setup 6 2 3 Installation Guide for GUI program Windows 7 compatible 7 3 Quick Start Up Procedure 10 4 Additional Control Options 11 5 Instructions for Standalone Evaluation 16 6 LP8863EVM Board Stackup 17 7 LP8863EVM Component Placement 18 8 LP8863EVM Component List 19 9 LP8863EVM Schematics 22 10 Using the LP8863EVM 24 10 1 Power up down sequence 24 10 2 Enable 24 10 3 Set...

Страница 2: ... driver The device offers configurability and can be set up through external resistor options for boost switching frequency LED current and PWM out frequency Internal register options enable various controls such as brightness inputs slope control dimming options etc The EVM contains one LP8863 Q1 LED driver with boost circuit and a Tiva Launchpad evaluation circuit to provide control signals for ...

Страница 3: ...r R59 Maximum LED current per string 120 mA set by external resistor R57 PWM input to control brightness register control PWM output frequency 9 8 kHz set by external resistor R58 I2 C interface to communicate with LP8863 Q1 base address 0x2C Charge pump for SW gate drive enabled J14 Open to disconnect VDDIO input from VLDO out J17 Open to use internal charge pump J19 Close to connect onboard LDO ...

Страница 4: ...nput VDD terminal and also probing header for LP8863 Q1 power The terminal provides a power connection to allow the user to attach the EVM to a power supply and also monitor VDD connected to J4 J4 Input This banana socket is the power input VDD terminal for LP8863 Q1 power The terminal provides a power VDD connection to allow the user to attach the EVM to a power supply J5 Input This banana socket...

Страница 5: ...t VLDO of LP8863 Q1 J15 Input This header is the power input VDDIO terminal and also probing header for VDDIO The terminal provides a power connection to allow the user to attach the EVM to a power supply and also monitor VDDIO selected by J14 J16 Headers These headers are probing noise injecting points for stability measurement of boost J17 Connector This connector is to connect VDD to the intern...

Страница 6: ...EVM Evaluation Module 2 2 LP8863EVM Setup External power must be provided to the board Connect a standard type A plug from the PC to a Mini B plug which goes to the EVM connector The I2 C compatible interface program provides all of the controls that the LP8863 Q1 device requires Figure 3 LP8863EVM With LED Load Board Connected ...

Страница 7: ...017 Texas Instruments Incorporated The LP8863EVM Evaluation Module 2 3 Installation Guide for GUI program Windows 7 compatible Run setup_LP8863_EVM_1 0 0 exe Click Next button on this setup screen Figure 4 LP8863_EVM_GUI Setup Check I accept the agreement and press Next button again ...

Страница 8: ...umentation Feedback Copyright 2017 Texas Instruments Incorporated The LP8863EVM Evaluation Module Figure 5 License Agreement Choose the folder name of GUI to be installed then press Next button or simply press Next button Figure 6 Installation Directory ...

Страница 9: ...on Module Begin SW installation by pressing Install button in next window Once installation is completed press Finish to launch SW GUI of LP8863 Q1 Figure 7 Completing the LP8863_EVM_GUI Setup Wizard Initial window of GUI Prepare hardware connection after this window as described in the following sections Figure 8 LP8863_EVM_GUI Home Page ...

Страница 10: ...GUI Control Window Check EVM connected mark on bottom of GUI software Press IFSEL Pin button to select I2 C interface This is not required if register control is not used Enable VIN power supply output IIN is approximately a couple of mA at normal cases If higher current on either power rail is monitored disable power supply output and begin debugging Click Enable Pin button on GUI software boost ...

Страница 11: ...ns If external boost frequency sync is needed check Enable box of BST SYNC select frequency and duty from drop down boxes and press Update button Remove pullup and or pulldown resistors on EVM to avoid voltage division by these resistors when external boost sync signal is used LED driver headroom voltage can be controlled by led_driver_headroom Use drop down box to select desired headroom voltage ...

Страница 12: ...and temperature sensor are available by User Config If temp_mon_en is set die temperature can be read by window below If brightness mode is selected to use brightness register as a brightness input not PWM input signal base brightness can be controlled by window below Control windows below can be used for independent dimming where each LED string is controlled independently See the LP8863 Q1 data ...

Страница 13: ...rol window can be manually updated to reflect latest values by pressing Update All button If additional register controls or direct register controls are needed each register can be accessed directly by input window below Firmware version of the Tiva Launchpad is shown here and the latest version is 1 0 6 Individually programmed register values can be saved or loaded by file menu on top of the GUI...

Страница 14: ...VM Evaluation Module Register file is txt format and can be renamed in the GUI or with a file managing program such as Windows Explorer Settings saved can be opened and programmed automatically by selecting Load Registers from file menu Register tab can be selected by pressing icon on left side of GUI Initially all register values are hidden as below ...

Страница 15: ...orporated The LP8863EVM Evaluation Module All register values appear if cell for LP8863 Registers is pressed Press Read All to update all register values with current values Read button is used to read only selected register on Register name column to reduce read time Each register bit can be changed by double click each bit cell ...

Страница 16: ...s register bit name type and values 5 Instructions for Standalone Evaluation The LP8863EVM can be used for standalone evaluation without evaluation software and PC connection These are minimum requirements to use LP8863EVM as a standalone mode Power supplies for VIN 24 V or higher 6 A or higher Power supplies for VDD 5 5 V or higher 0 5 A or higher if external power supply is used Power cables for...

Страница 17: ...onnect external PWM source here SDO_PWM 4 Mount R63 to select I2 C interface so PWM input pin is not assigned to SDO of SPI interface 5 Mount R64 to pull up EN input 6 Change pullup and pulldown resistors to select spread spectrum enable R66 or disable R71 option The minimum procedures for turning on the LEDs after modifications above are as follows Connect external power VBAT 3 V to 48 V typical ...

Страница 18: ...ebruary 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated The LP8863EVM Evaluation Module 7 LP8863EVM Component Placement Figure 11 LP8863EVM Component Placement Top Layer Figure 12 LP8863EVM Component Placement Bottom Layer ...

Страница 19: ...01KAT2A C51 1 10uF CAP CERM 10uF 16V 20 X7R 1206 1206 C3216X7R1C106M C53 1 2 2uF CAP CERM 2 2uF 25V 10 X7R 0805 0805_HV GRM21BR71E225KA73L C54 1 100pF CAP CERM 100 pF 50 V 10 X7R 0402 402 CC0402KRX7R9BB101 C55 C57 2 4 7uF CAP CERM 4 7 µF 10 V 10 X7R 0805 0805_HV LMK212B7475KG T C59 1 10uF CAP CERM 10uF 10V 10 X7R 0805 0805_HV GRM21BR71A106KE51L C61 C62 C63 C64 C65 C66 C69 C70 C71 C72 C73 C74 12 22...

Страница 20: ... above insulator TSW 101 07 G S TSW 101 07 G S J33 1 Header 100mil 9x1 Vertical TH Samtec_TSW 109 07 G S TSW 109 07 G S J35 1 Header TH 100mil 1pos Gold plated 230 mil above insulator TSW 101 07 G S TSW 101 07 G S L1 1 2 2uH Inductor Shielded Powdered Iron 2 2 µH 10 5 A 0 0137 ohm SMD IHLP 3232DZ IHLP3232DZER2R2M01 L2 1 50 ohm Ferrite Bead 50 ohm 100 MHz 12 A 1206 1206 BLM31SN500SZ1L L3 1 22uH Ind...

Страница 21: ... RC0603FR 073K92L R72 1 4 99k RES 4 99 k 0 5 0 1 W 0603 603 RT0603DRE074K99L R 1 25 5k RES 25 5 k 0 1 0 1 W AEC Q200 Grade 0 0603 603 ERA 3AEB2552V S1 1 Switch Tactile SPST NO 0 05A 12V SMD SW_EVQP7A EVQ P7A01P U1 1 Tiva C Series Microcontroller PM0064A PM0064A_M TM4C123GH6PMI7R U2 1 ULTRA LOW NOISE 250 mA LINEAR REGULATOR FOR RF AND ANALOG CIRCUITS REQUIRES NO BYPASS CAPACITOR DBV0005A DBV0005A_N...

Страница 22: ...SCLKC SSIC SDOC SDIC PWMC SS SDI SDO 0 R17 0 R29 0 R30 0 R31 BST_SYNCC 5 4 1 2 3 6 7 8 9 10 11 12 J2 TSW 112 07 G S 3 3V VDDIO_L 3 3V HB 0 01uF 0 1 µF C6 C5 0 01uF 0 1 µF C4 C3 0 01uF C2 GND GND 0 1µF C10 0 1µF C9 0 1µF C7 GND PWMC1 0 R4 USR_SW2 3 3V 10k R5 RESETn USB_DM 1 2 3 4 S1 USB_DP PB6 1 VDDA 2 GNDA 3 PB7 4 PF4 5 PE3 6 PE2 7 PE1 8 PE0 9 PD7 10 VDD 11 GND 12 PC7 13 PC6 14 PC5 15 PC4 16 PA0 U...

Страница 23: ... 3 VSENSE_P 4 C1N 5 C1P 6 CPUMP 7 CPUMP 8 GD 9 GD 10 PGND 11 PGND 12 ISNSGND 13 ISNS 14 FB 15 DISCHARGE 16 LED5 17 LED4 18 LED3 19 LED2 20 LED1 21 LED0 22 ISET 23 EN 24 VDDIO 25 INT 26 IFSEL 27 BST_SYNC 28 SDO_PWM 29 SDI_SDA 30 SCLK_SCL 31 SS_ADDRSEL 32 BST_FSET 33 PWM_FSET 34 NC 35 NC 36 VLDO 37 GND 38 GND_LED 39 U8 LP8863ADCPRQ1 0 R24 0 R25 0 R45 SRP1770TA 220M 22µH L3 5 4 1 2 3 Q5 NVMFS5C682NLT...

Страница 24: ...DD from on board LDO a few hundred µs earlier than EN Input VBAT and VDDIO earlier than EN Power down VIN must be high for at least 400 ms after EN is low for correct discharge operation VDDIO and VBAT must be low after EN is low 10 2 Enable The EN pin controls boost enable disable If brightness input is 0 while EN is high boost output voltage stays at the initial voltage approximately 46 V 10 3 S...

Страница 25: ...ion of LP8863 Q1 is automatically detected at VDD POR Any LED out pins LED0 to LED5 connected to GND are disabled and removed from adaptive loop control Pin 2 of J21 to J26 can be used to connect LED out pins to GND 11 LED Load Board The LED board is intended to be used as the load for LED drivers and can use up to 6 strings and up to 20 LEDs in the string number of LEDs in use are defined by jump...

Страница 26: ...LED Load Board www ti com 26 SNVU558 February 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated The LP8863EVM Evaluation Module Figure 16 LED Load Board Schematic Diagram ...

Страница 27: ...LED Load Board QTY DESIGNATOR DESCRIPTION MANUFACTURER PART NUMBER 6 R1 R2 R3 R4 R5 R6 RES 10 0 ohm 1 0 1W 0603 Vishay Dale CRCW060310R0FKEA 7 J1 J22 J43 J64 J85 J106 J127 Header TH 100mil 2x2 Gold plated 230 mil above insulator Samtec TSW 102 07 G D 121 J2 J21 J23 J42 J44 J63 J65 J84 J86 J105 J107 J126 J129 Header TH 100mil 3x1 Gold plated 230 mil above insulator Samtec TSW 103 07 G S 1 J130 Head...

Страница 28: ...y set forth above or credit User s account for such EVM TI s liability under this warranty shall be limited to EVMs that are returned during the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warr...

Страница 29: ...the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this list having a gain greater than the maximum gain indicated for that type are strictly prohibited for use with this device Concernant les EVMs avec antennes détachables Conformément à la réglementation d Industrie Canada le présent émetteur radio peut fo...

Страница 30: ...ed loads Any loads applied outside of the specified output range may also result in unintended and or inaccurate operation and or possible permanent damage to the EVM and or interface electronics Please consult the EVM user guide prior to connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation even ...

Страница 31: ...COST OF REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN TWELVE 12 MONTHS AFTER THE EVENT THAT GAVE RISE TO THE CAUSE OF ACTION HAS OCCURRED 8 2 Specif...

Страница 32: ... TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right or other intellectual property right relating to any combination machine or process in which TI product...

Страница 33: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments LP8863EVM ...

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