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Texas Instruments LP8731-Q1, User Manual

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Texas Instruments LP8731-Q1 User Manual Download Page 11

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General Control and LDO Settings

Figure 15.

6.7

Buck Function

Figure 16.

This section is used to interface with UVLO enable, nPOR delay, buck spread spectrum enable and
frequency registers.

11

SNVU458 – November 2014

LP8731-Q1 Evaluation Board

Submit Documentation Feedback

Copyright © 2014, Texas Instruments Incorporated

Summary of Contents for LP8731-Q1

Page 1: ...Using the LP8731 Q1 Evaluation Board User s Guide Literature Number SNVU458 November 2014 ...

Page 2: ...c User Interface GUI 8 5 1 Overview 8 5 2 PC Requirement 8 5 3 Start Up 8 6 General Control and LDO Settings 9 6 1 USBAny Control 9 6 2 GPIO Enable Control 9 6 3 General Control and LDO Settings 9 6 4 System Control 10 6 5 LDO Output Control 10 6 6 Buck Voltage Ramp Rate Control 10 6 7 Buck Function 11 6 8 Misc Page 12 2 Table of Contents SNVU458 November 2014 Submit Documentation Feedback Copyrig...

Page 3: ... use the LP8731YZREVM The LP8731YZREVM package should include one LP8731YZREVM one USB2ANY box set As Figure 2 shows the USB2ANY box set contains six A F parts and only three parts A B C are required for LP8731YZREVM evaluation 2 1 Jumper Settings Place all the jumpers with dark red power and light blue Enable color mark as shown in Figure 1 2 2 Connect USB2ANY box to LP8731YZREVM 1 Connect USB ca...

Page 4: ...Hardware Setup www ti com Figure 1 Figure 2 4 LP8731 Q1 Evaluation Board SNVU458 November 2014 Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Page 5: ...ayout and Bill of Materials 3 Board Layout and Bill of Materials Figure 3 LP8731 Q1 Schematic 5 SNVU458 November 2014 LP8731 Q1 Evaluation Board Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Page 6: ...d TH JP18 JP13 JP14 JP15 Header TH 100mil 1x3 Gold plated 230 mil above 8 5 1 x 3 PBC03SAAN Sullins Connector Solutions JP16 JP17 insulator 9 L2 L3 2 2 2 µH VLCF5020T 2R2N2R6 1 TDK Corporation INDUCTOR POWER 2 2UH 2 6A SMD 10 R1 R2 2 4 7 k CRCW08054K70JNEA Vishay Dale RES 4 7kΩ 5 0 125W 0805 11 R15 1 100 k CRCW0805100KFKEA Vishay Dale RES 100kΩ 1 0 125W 0805 SH JP1 SH JP2 SH JP3 SH JP4 SH JP5 12 S...

Page 7: ... 4 LP8731 Q1EVM PCB Layout and Layers Figure 4 Top Layer Figure 5 Mid Layer 1 Figure 6 Mid Layer 2 Figure 7 Bottom Layer 7 SNVU458 November 2014 LP8731 Q1 Evaluation Board Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Page 8: ...ork 4 0 5 3 Start Up 1 Complete the hardware setup following previous setup section 2 Apply recommended voltage see LP8731 Q1 data sheet SNVSA28 for details to LP8731YZREVM 3 Launch the GUI by double clicking the Icon 4 The GUI then launches as picture shows below NOTE At the first time use the USB2ANY firmware update message window pops up please simply follow the screen instruction to complete t...

Page 9: ...Y Control 6 2 GPIO Enable Control Figure 10 NOTE In order to have the control works correctly please place the jumpers according to Section 2 6 3 General Control and LDO Settings Figure 11 9 SNVU458 November 2014 LP8731 Q1 Evaluation Board Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Page 10: ...for selecting power up down sequence delay when EN_T control is used 6 5 LDO Output Control Figure 13 Two slide bars are used to change the LDO outputs 6 6 Buck Voltage Ramp Rate Control Figure 14 These four drop down boxes are used to select target voltage and ramp for both buck regulators please read the LP8731Q datasheet link for detail information Read button is for updating reading the latest...

Page 11: ...k Function Figure 16 This section is used to interface with UVLO enable nPOR delay buck spread spectrum enable and frequency registers 11 SNVU458 November 2014 LP8731 Q1 Evaluation Board Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Page 12: ...Figure 17 This page contains the I2 C log on the left and a manual I2C Read Write tool on the right side default I2 C address is 59 12 LP8731 Q1 Evaluation Board SNVU458 November 2014 Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Page 13: ...ring 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 warranted for the remainder of the original warranty period Replaced EVMs shall be warranted for a new full ninety 90 day warranty period 3 ...

Page 14: ... 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 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 rég...

Page 15: ... 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 with the inputs and outputs kept within the specified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors cu...

Page 16: ...F 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 ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED 8 2 Specific Limitations IN NO EVENT SHALL T...

Page 17: ...esponsible 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 information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

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