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Using the TPS61194xEVM Evaluation Module

User's Guide

Literature Number: SNVU492

January 2016

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Summary of Contents for TPS61194xEVM

Page 1: ...Using the TPS61194xEVM Evaluation Module User s Guide Literature Number SNVU492 January 2016...

Page 2: ...1 PWM Input to Initiate Start up Sequence 8 6 2 Shutdown Sequence 8 7 Boost Converter 9 7 1 Switching Frequency 9 7 2 Spread Spectrum and Synchronization 9 7 3 Voltage Control 10 8 LED Current Sinks...

Page 3: ...age vs R12 10 7 Output Current vs RISET 11 8 Evaluation Board Schematic 12 9 LED Load Board Top Side 14 10 LED Load Board Bottom View 14 11 LED Load Board Schematic Diagram 15 12 Forward Voltage for C...

Page 4: ...be required to correct this interference 1 4 If You Need Assistance Contact your local TI sales representative 2 Introduction The Texas Instruments TPS61194xEVM evaluation module EVM helps designers...

Page 5: ...S61194 Q1 device supports PWM brightness dimming ratio up to 10 000 1 for input PWM frequency of 200 Hz The device integrates extensive safety and protection features 3 1 Features Four High Precision...

Page 6: ...TROL POINTS Hardware Setup www ti com 4 Hardware Setup Figure 1 shows connectors and main components on the TPS61194 or TPS61194 Q1 board Figure 1 Evaluation Board Connectors and Setup 6 TPS61194xEVM...

Page 7: ...op Layer Figure 3 Bottom Layer GND See the TPS61194 SNVSAF5 or TPS61194 Q1 SNVSAE9 datasheet for PCB layout guidelines 7 SNVU492 January 2016 TPS61194xEVM Evaluation Module Submit Documentation Feedba...

Page 8: ...he VDDIO EN voltage is set above threshold voltage 1 2 V By default boost switching frequency is 400 kHz jumper J4 connecting R3 160 k to FSET and boost maximum voltage is 37 V R12 750 k and R13 130 k...

Page 9: ...ncy remove jumper J4 short pins 7 and 8 on jumper J17 and connect the external resistor to connector J18 Boost internal parameters are adjusted automatically according to chosen frequency during start...

Page 10: ...V R12 R13 values are in k 2 Figure 6 Converter Maximum Output Voltage vs R12 Maximum voltage should be chosen based on the maximum voltage required for LED strings Recommended maximum voltage is abou...

Page 11: ...Output Current vs RISET 8 3 Brightness Control The TPS61194 or TPS61194 Q1 controls the brightness of the display with conventional PWM Output PWM will directly follow the input PWM Input PWM frequenc...

Page 12: ...Schematic www ti com 10 Evaluation Board Schematic Figure 8 Evaluation Board Schematic 12 TPS61194xEVM Evaluation Module SNVU492 January 2016 Submit Documentation Feedback Copyright 2016 Texas Instrum...

Page 13: ...230 Samtec TSW 108 07 G D 2 mil above insulator J16 Header TH 100mil 10x2 Gold plated Samtec TSW 110 07 G D 1 230 mil above insulator J18 Header TH 100mil 10x1 Gold plated Samtec TSW 110 07 G S 1 230...

Page 14: ...maximum current 175 mA and maximum forward voltage 3 5 mA at 80 mA 3 3 V typical are used on the board For the TPS61194 or TPS61194 Q1 4 strings are assembled NOTE The LED board is not included with t...

Page 15: ...8 1 2 3 J59 1 2 3 J60 1 2 3 J61 1 2 3 J62 1 2 3 J63 GND 1 2 3 4 J64 D80 D79 D78 D77 D76 D75 D74 D73 1 2 3 J77 1 2 3 J78 1 2 3 J79 1 2 3 J80 1 2 3 J81 1 2 3 J82 1 2 3 J83 1 2 3 J84 GND 1 2 3 4 J85 D100...

Page 16: ...er 100mi 2x2 Samtec TSW 102 07 G D 7 J85 J106 J127 J2 J21 J23 J42 J44 J63 J65 J84 Header 100mi 3x1 Samtec TSW 103 07 G S 121 J86 J105 J107 J126 J129 J130 Header 100mi 7x1 Samtec TSW 107 07 G S 1 D1 D1...

Page 17: ...ing 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 repa...

Page 18: ...transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indic...

Page 19: ...ified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors current sens...

Page 20: ...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 L...

Page 21: ...sponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related inf...

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