Texas Instruments DRV8703-Q1 User manual

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DRV8703-Q1 EVM User’s Guide
(1) NexFET, MSP430 are trademarks of Texas Instruments.
(2) All other trademarks are the property of their respective owners.
(1)(2) User's Guide
SLVUAW3A–October 2016–Revised October 2018
DRV8703-Q1 EVM User’s Guide
1 DRV8703-Q1-EVM
This user's guide is provided with the DRV8703-Q1 customer evaluation module (EVM) as a supplement
to the DRV8703-Q1 data sheet. This document details the hardware implementation of the EVM and how
to use DRV8703-Q1 EVM GUI application.
1.1 Board Overview
Figure 1. Board Components

Emulation Control Power
USB UART MSP430G2553 DRV8703-Q1 Drive-Stage Brushed
DC Motor
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WARNING
Hot surfaces include the power MOSFETs (Q3-Q8), power sense
resistors (R74-77), and areas around them.
The DRV8703-Q1 EVM serves as an evaluation kit to demonstrate TI’s DRV8703-Q1 H-bridge gate driver
in a 3.5-in × 2.2-in compact form factor. An MSP430G2553 device is used to control the speed and
direction of the motor, while also monitoring the motor current from the DRV8703-Q1 device. The power
stage is created using the DRV8703-Q1 H-bridge gate driver and the CSD18540Q5B N-channel
NexFET™ power MOSFETs. The EVM is a high-performance, power-efficient, and cost-effective platform
that speeds development for a quicker time to market.
Figure 2. Block Diagram

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1.2 Jumper Settings and Test Points
Figure 3. Board Jumpers and Test Points
The jumper settings and test points are as follows:
micro-USB (J1) — Use J1 to interface to a micro-USB cable for GUI evaluation purposes.
GP Push Button or MCU Reset (J2) — Set J2 to RESET for MCU reset functionality or PUSH for
general-purpose input functionality.
Spy-Bi-Wire (J3) — J3 is for a serialized JTAG protocol used for MSP430 MCUs. J3 can connect an
MSP430 Spy-Bi-Wire male header to this female header. It is the only way to reprogram the
MSP430™ MCU on the EVM and it is the method utilized instead of the USB-to-JTAG method.
Test and Interface Header (J4) — J4 can be used to monitor input or output signals from the EVM or
supply external control signals.
Power Phase Test Pinouts — These pinouts are used to measure the single H-bridge node voltages.
To Motor — Two-port bulk header to connect the brushed DC motor.
To Power Supply — Two-port power-supply bulk header. This header accepts supplies from 5.9 V to
45 V.

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2 GUI Application
Figure 4. DRV8703-Q1-EVM GUI (Motor Control Page)
2.1 Installation
Follow these steps to get started:
Step 1. Install the GUI.
Download and run the installer, Setup_DRV8703-Q1_DRV8703Q1EVM.exe, to install the GUI
application.
Step 2. Install the FTDI device driver.
If the FTDI USB device driver is not already installed, the driver must be installed manually. The device
driver setup can be found in the C:\Program Files (x86)\Texas Instruments\DRV8703-
Q1\FTDI_USB_DRIVER folder after successfully completing the installation in Step 1. Run the
CDM21216_Setup.exe file in this folder and follow the installation instructions.
2.2 Hardware Setup
The hardware required to run the motor control is a micro-USB cable, the DRV8703-Q1 EVM, and a
power supply with a DC output from 5.9 to 45 V. First the brushed DC motor is connected to the motor
terminal block on the DRV8703-Q1 EVM. Next the micro-USB cable is connected to the PC and to the
DRV8703-Q1 EVM. Finally the power supply is connected to the DRV8703-Q1 EVM. Verify any faults by
testing the nFAULT pin voltage to be 3.3V (pulled logic low if a fault condition exists).
2.3 DRV8703-Q1 EVM GUI
The DRV8703-Q1 EVM_GUI is provided with the DRV8703-Q1 EVM to control a brushed DC motor and
manipulate various settings. The GUI provides functionality for adjusting the speed and direction of the
motor, adjusting the current-regulation limit, observing the measured drive current, and monitoring the
device status.
Use these steps to control the DRV8703-Q1 EVM through the GUI application:
Step 1. Attach the brushed DC motor

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Step 2. Plug in the micro-USB cable.
Step 3. Enable the motor power supply (see Section 2.3).
Step 4. Click on the DRV8703-Q1 EVM shortcut either on the desktop or from the start menu to run
the GUI application.
Step 5. The Serial Port page displays a list of COMs available for opening the connection as shown
in Figure 5. If nothing is physically connected to the PC, the COM drop-down list displays --
No Ports --.
Figure 5. DRV8703-Q1-EVM GUI (List COM ports)
Step 6. Select the relevant COM from the drop-down list and click on the Open button.
Step 7. After the GUI connects, the window in Figure 6 is displayed. Verify that the COM port name
(COM port number may differ), and baud rate match what is shown in Figure 6. The bottom
left corner of the status bar shows a green indicator to indicate the connection with the
opened COM mentioned in the bracket.

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Figure 6. DRV8703-Q1-EVM GUI (COM Opened)
Step 8. Click on the Menu icon in the top-left corner of the GUI to open a side-bar menu. Using the
side-bar menu, navigate to the following pages or sub-pages at any time:
• Introduction
– Device
– EVM
• Registers
• Motor Control
• Serial Port

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2.3.1 Introduction Page
The Introduction page has the general information about the DRV8703-Q1 device. The sub-pages, Device
and EVM, under the Introduction page have a detailed description about the device and EVM respectively
as shown in Figure 7.
Figure 7. DRV8703-Q1-EVM GUI (Introduction Page)
2.3.2 Registers Page
This page shows all the registers and register fields present on the DRV8703-Q1. The page allows
reading, writing, or both to any register, register field, or bit as shown in Figure 8.
Figure 8. DRV8703-Q1 EVM GUI (Register Page)

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2.3.3 Motor Control Page
This page has different widget controls to control the motor as show in Figure 9.
Figure 9. DRV8703-Q1-EVM GUI (Motor Control Page)

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