DRV8434AEVM User Guide Datasheet

{if TEXAS INSTRUMENTS
User’s Guide
DRV8434A Evaluation Module User's Guide
Abstract
This document is provided with the DRV8434A evaluation module (EVM) as a supplement to the DRV8434A
stepper motor driver datasheet. This user's guide details the hardware implementation of the EVM. Details on
using the graphical user interface (GUI) software with this EVM can be found in the DRV8434AEVM GUI User's
Guide.
Table of Contents
Abstract...................................................................................................................................................................................... 1
1 Board Overview...................................................................................................................................................................... 2
2 Introduction.............................................................................................................................................................................3
2.1 Connectors.........................................................................................................................................................................3
2.2 Test Points..........................................................................................................................................................................3
2.3 Jumpers..............................................................................................................................................................................4
2.4 Motor Outputs.................................................................................................................................................................... 4
2.5 EVM Operation...................................................................................................................................................................4
2.6 EVM documentation...........................................................................................................................................................4
Trademarks
MSP430™ is a trademark of Texas Instruments.
All trademarks are the property of their respective owners.
www.ti.com Abstract
SLOU546 – NOVEMBER 2020
Submit Document Feedback
DRV8434A Evaluation Module User's Guide 1
Copyright © 2020 Texas Instruments Incorporated
I TEXAS INSTRUMENTS Far evaluation anlymol FCC approved for man. an“ mm m H pnak :urrom, - aYLJaEPE , nrnqu nnumm war/mama mummum HD/UREFR S 5”? .‘fi’m rm_cumsn_m srumn: nourz sum mm \m m «snwawz - n U svzwemam“ noun nrnmvnmm m I mam/Amman as | "st59 m} INSTRUMENTS
1 Board Overview
WARNING
The EVM is rated for power supply voltages between 4.5 VDC and 48 VDC max. The components
can support peak output currents up to a maximum 4A. To minimize risk or personal injury, fire
and/or property damage, always maintain component temperatures below the 130°C rating of the
printed circuit board material.
Figure 1-1 shows the top view of the printed circuit board (PCB)
Figure 1-1. Top View of Typical Board Configuration (EVM provided may vary)
Board Overview www.ti.com
2DRV8434A Evaluation Module User's Guide SLOU546 – NOVEMBER 2020
Submit Document Feedback
Copyright © 2020 Texas Instruments Incorporated
INSTRUMENTS Power supply
2 Introduction
The DRV8434AEVM is a platform to support prototyping and evaluation for the DRV8434A device, a medium-
voltage dual H-bridge driver for stepper driving applications with analog stall detection function.
The EVM uses an MSP430™ microcontroller and a USB interface chip to manage communication from the GUI
software application installed on a computer. The GUI sends serial commands to the MSP430 to control the
device signals, monitor faults, and drive a motor.
This user's guide details the hardware configurability of the evaluation module.
2.1 Connectors
The DRV8434AEVM supplies the VM (motor voltage) power rail through the terminal block (J1). A set of test
clips in parallel with the terminal block provide connections to monitor the input power rail.
The user must apply the VM voltage according to the recommended parameters listed in the datasheet of the
device populated on the EVM (should be labeled on the EVM).
Figure 2-1. Board Connections
2.2 Test Points
A header connector with 0.100-inch pitch (J3) provides access to the DRV8434A signals. This can be used for
measurement or as a connector to control the DRV8434A from an external microcontroller for prototype
purposes. To disconnect the on-board MSP430 microcontroller, remove related zero ohm resistors between the
MSP430 and the J3 header. Table 2-1 describes the connections available on the J3 header. Each header pin is
labeled on the evaluation module and connects to the corresponding pin of the DRV8434A.
Table 2-1. Connections to the DRV8434A Using External Microcontroller
Header Label Description
MCU 3.3V 3.3 V rail for the on-board MSP430 and nFAULT LED.
nFAULT Fault output.
VREF/VREFB/EN4 Current setting reference input.
M0/VREFA/EN3 Microstepping mode-setting pin.
www.ti.com Introduction
SLOU546 – NOVEMBER 2020
Submit Document Feedback
DRV8434A Evaluation Module User's Guide 3
Copyright © 2020 Texas Instruments Incorporated
I TEXAS INSTRUMENTS
Table 2-1. Connections to the DRV8434A Using External Microcontroller (continued)
Header Label Description
STL_REP
Stall report pin: the STL_REP pin is set high by the DRV8434A
whenever stall is detected. If the pin is pulled low external to the
device, then stall fault reporting is disabled. In stall threshold learning
mode, after a successful learning, STL_REP goes from high to low.
This pin must be pulled-up using an external resistor.
TRQ_CNT/STL_TH
Torque count output when STL_MODE = 0V; Learn result output
when STL_MODE=HiZ; Stall threshold input when STL_MODE =
DVDD.
STL_MODE
STL_MODE pin: When STL_MODE = 0V, stall threshold is computed
by the driver and the TRQ_CNT/STL_TH pin acts as torque count
(analog voltage output). When STL_MODE=HiZ, stall threshold
learning is enabled. When STL_MODE = 1, stall threshold is set by
applying a voltage on the TRQ_CNT/STL_TH pin.
M1/BPH/BIN2 Microstepping mode-setting pin.
STEP/BEN/BIN1 STEP pin.
DIR/APH/AIN2 DIR pin.
ENABLE/AEN/AIN1 Enable pin.
nSLEEP Sleep mode input.
GND Ground.
2.3 Jumpers
The DRV8434AEVM has no jumpers.
2.4 Motor Outputs
Two motor connectors are provided (J6 and J7).
2.5 EVM Operation
Use the following steps to operate the EVM:
1. Install the drivers and GUI. For instructions see DRV8434AEVM GUI User's Guide.
2. Connect the wires of the stepper motor to the AOUT1, AOUT2, BOUT1, and BOUT2 terminals.
3. Connect the VM power supply to VM connections, but do not turn on power yet.
4. Connect the USB cable between the PC and the EVM. When the USB is connected to the EVM, the status
LED will begin to blink.
5. Download and install the DRV8434A GUI from www.ti.com. Run the GUI program. The GUI can take up to 30
seconds to establish a connection with the EVM. If connection is not established, try manually selecting the
correct COM port under the Options menu. The baud rate should be 9600.
6. Apply the desired voltage to the VM and GND connections.
7. For more instructions on how to control the DRV8434AEVM using the GUI, refer the DRV8434AEVM GUI
User's Guide.
2.6 EVM documentation
The EVM schematics, layout, and BOM are provided in the DRV8434AEVM hardware files. The GUI, USB
drivers, and MSP430F2617 source code are provided in the DRV8434AEVM firmware and GUI software files.
Introduction www.ti.com
4DRV8434A Evaluation Module User's Guide SLOU546 – NOVEMBER 2020
Submit Document Feedback
Copyright © 2020 Texas Instruments Incorporated
IMPORTANT NOTICE AND DISCLAIMER
TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE
DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS”
AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY
IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD
PARTY INTELLECTUAL PROPERTY RIGHTS.
These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate
TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable
standards, and any other safety, security, or other requirements. These 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, and you will fully indemnify TI and its representatives against, any claims,
damages, costs, losses, and liabilities arising out of your use of these resources.
TI’s products are provided subject to TI’s Terms of Sale (www.ti.com/legal/termsofsale.html) or other applicable terms available either on
ti.com or provided in conjunction with such TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable
warranties or warranty disclaimers for TI products.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2020, Texas Instruments Incorporated