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User's Guide

SLLU203A – June 2014 – Revised March 2015

DRV8846 Evaluation Module

This document is provided with the DRV8846 customer evaluation module (EVM) as a supplement to the
DRV8846 (

SLLSEK2

) datasheet. It details the hardware implementation of the EVM.

Contents

1

PCB (Top View)

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2

2

Introduction

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2

2.1

Connectors

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2

2.2

Test Points

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3

2.3

Jumpers

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4

2.4

Motor Outputs

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4

2.5

Operation of the EVM

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4

2.6

Motor Control Frame (Includes Start/Stop Steps and Move Steps)

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6

2.7

Schematic and Bill of Materials (BOM)

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9

Appendix A

Driver Installation Instructions

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12

List of Figures

1

Connections

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3

2

DRV8846 Schematic (1 of 2)

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9

3

DRV8846 Schematic (2 of 2)

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10

1

SLLU203A – June 2014 – Revised March 2015

DRV8846 Evaluation Module

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Copyright © 2014–2015, Texas Instruments Incorporated

Summary of Contents for DRV8846EVM

Page 1: ...2 2 1 Connectors 2 2 2 Test Points 3 2 3 Jumpers 4 2 4 Motor Outputs 4 2 5 Operation of the EVM 4 2 6 Motor Control Frame Includes Start Stop Steps and Move Steps 6 2 7 Schematic and Bill of Materials...

Page 2: ...e the stepper motor by issuing the step commands at the desired rate The microcontroller firmware operates using internal index mode This user s guide details the operation of the EVM as well as the h...

Page 3: ...e DRV8846 Table 1 Descriptions of the Connections Available on the J4 Header Header Label Description V3P3R 3 3 V after 33 resistor nFAULT Fault output nSLEEP Sleep Mode input RSVD Adaptive DECay inpu...

Page 4: ...ction a Once the USB connection is established the Status LED will begin to blink 5 Apply 12 V to the VM and GND connections 6 Configure the current settings step and decay modes torque and pwm off ti...

Page 5: ...te buttons The Start Stop Steps button is used to run the motor indefinitely The motor will accelerate to the target speed and run until the Start Stop Steps button is selected When the Start Stop Ste...

Page 6: ...y using an acceleration profile which will be detailed later on A detailed explanation of each stepper control section follows This frame allows the configuration and running of the stepper with the d...

Page 7: ...decelerate until the stop speed PPS is reached in which case the motor fully stops A second motor actuation is provided by the Move of Steps and Reciprocate commands in which a programmed number of s...

Page 8: ...ue to the particular parameters being chosen stopping the motor at a speed very close to the stop speed is often good enough to ensure good motion quality and application performance The following fig...

Page 9: ...2 F C3 1 2 J1 ED555 2DS nSLEEP nFAULT 4 99k R3 BOUT1 BOUT2 VM AISEN VINT VREF DIR I1 I0 M0 M1 TOFF_SEL nENBL STEP ADEC 0 25 R1 0 25 R2 GND 510 R4 1 2 J2 ED555 2DS 1 2 J3 ED555 2DS MSP_M1 MSP_TOFF_SEL...

Page 10: ...P6 5 A5 4 P6 6 A6 5 P6 7 A7 SVSIN 6 VREF 7 XIN 8 XOUT 9 VEREF 10 VREF VEREF 11 P1 0 TACLK CAOUT 12 P1 1 TA0 13 P1 2 TA1 14 P1 3 TA2 15 P1 4 SMCLK 16 P1 5 TA0 17 P1 6 TA1 18 P1 7 TA2 19 P2 0 ACLK CA2...

Page 11: ...re Technology ED555 2DS 3 J4 Header Male 18 pin 100mil spacing STD PEC18SAAN 1 J5 Header 100mil 7x2 Tin plated TH Sullins Connector Solutions PEC07DAAN 1 J6 Connector micro USB Type B Receptacle R A S...

Page 12: ...d folder Application and move the folder DRV8846EVM_GUIv1 0 into the C ti guicomposer webapps directory Note if you chose a non default installation directory in Step 1 the C ti part will be different...

Page 13: ...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 14: ...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 15: ...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 16: ...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 17: ...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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