Texas Instruments DRV8873x-Q1EVM User Manual
User's Guide
SLVUB68–October 2017
DRV8873x-Q1EVM User’s Guide
This document is provided with the DRV8873x-Q1EVM (DRV8873S-Q1EVM and DRV8873H-Q1EVM)
customer evaluation module (EVM) as a supplement to the DRV8873-Q1 Automotive H-Bridge Motor
Driver data sheet. This user's guide details the hardware implementation of the EVM and how to install the
software packages.
Contents
1 Introduction ................................................................................................................... 2
1.1 Overview............................................................................................................. 2
1.2 Purpose and Scope ................................................................................................ 2
2 Hardware and Software Overview......................................................................................... 3
2.1 Hardware Connections Overview................................................................................. 3
2.2 Connection Details.................................................................................................. 3
2.3 LED Lights and Switch Functions ................................................................................ 4
3 GUI Application .............................................................................................................. 4
3.1 Installation ........................................................................................................... 4
4 GUI Operation .............................................................................................................. 10
4.1 Hardware Setup ................................................................................................... 10
4.2 Launching the DRV8873x EVM GUI............................................................................ 10
1 DRV8873x-Q1EVM (Actual Board May differ)........................................................................... 2
2 EVM Connections............................................................................................................ 4
3 User Account Control ....................................................................................................... 5
4 Setup DRV8873x Window.................................................................................................. 5
5 License Agreement.......................................................................................................... 6
6 Accepted License Agreement.............................................................................................. 6
7 Installation Directory......................................................................................................... 7
8 Ready to Install .............................................................................................................. 7
9 Desktop Icons ................................................................................................................ 8
10 Installation Progress......................................................................................................... 8
11 Installation Complete ........................................................................................................ 9
12 Example of DRV8873x GUI Open ....................................................................................... 10
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DRV8873x-Q1EVM User’s Guide
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Introduction
1 Introduction
1.1 Overview
The DRV8873-Q1 device is an integrated driver IC for driving a brushed DC motor in automotive
applications. Two logic inputs control the H-bridge driver, which consists of four N-channel MOSFETs that
drive motors bi-directionally with up to 10-A peak current. The DRV8873-Q1 operates from a single power
supply and supports a wide input supply range from 4.5 V to 38 V.
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Figure 1. DRV8873x-Q1EVM (Actual Board May differ)
A PH/EN or PWM interface allows simple interfacing to controller circuits. Alternatively, independent halfbridge control is available to drive two solenoid loads.
A current mirror allows the controller to monitor the load current. This mirror approximates the current
through the high-side FETs, and does not require a high-power resistor for sensing the current.
A low-power sleep mode is provided to achieve very-low quiescent current draw by shutting down much of
the internal circuitry. Internal protection functions are provided for undervoltage lockout, charge pump
faults, overcurrent protection, short-circuit protection, open-load detection, and overtemperature. Fault
conditions are indicated on an nFAULT pin and through the SPI registers.
1.2 Purpose and Scope
This document is designed to be used as a startup guide and to supplement the DRV8873x-Q1EVM. This
document is intended for the engineers involved in the design, implementation, and validation of
DRV8873-Q1 device. The scope of this document is to provide the user with a guide to evaluate the
DRV8873-Q1 device using GUI control. This document covers the hardware (HW) connections required
between the DRV8873x-Q1EVM and the GUI. When the HW connections are complete, the user is
required to download and open the GUI to control the DRV8873-Q1 device.
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2 Hardware and Software Overview
Hot surfaces on the DRV8873x-Q1EVM include the DRV8873-Q1
device ( U1 ) and the area surrounding it.
When operating the DRV8873x-Q1EVM between 4-A and 6-A, the
device overtemperature warning should be monitored for
overtemperature warnings. The nFAULT pin indicates when the
device temperature has increased above 140°C and is approaching
thermal shutdown. As with any elevated temperatures, normal
precautions must be followed to avoid direct contact with the hot
surface of the DRV8873x-Q1EVM when used in the 4-A to 6-A load
range.
To minimize potential fire hazard, personal injury, or both,
externally provided fans may be required to adequately cool
customer-provided loads depending on loading conditions.
Hardware and Software Overview
WARNING
2.1 Hardware Connections Overview
The major blocks of the DRV8873x-Q1EVM include the DRV8873-Q1 driver, the MSP430G2553
microcontroller (MCU), the LM9036QMX-3.3/NOPB 3.3-V LDO regulator, and the USB communication.
The DRV8873x-Q1EVM is designed for an input supply from 4.5 to 38 V and up to 10-A peak drive
current.
The DRV8873-Q1 device driver is used to provide the current to the motor or other load. The MCU
communicates with the GUI to control the DRV8873-Q1 device.
2.2 Connection Details
Figure 2 shows the power connector and motor phase connector. A supply voltage ranging from 4.5 V to
38 V from a battery or a DC voltage source is connected to the voltage supply pins. The OUT1 and OUT2
pins can be connected to a single motor winding, inductor, or latched relay coil when used in PWM or
PH/EN mode. When used in independent half-bridge mode, the OUT1 pin can drive one load and the
OUT2 pin can drive a second load.
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Hardware and Software Overview
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Figure 2. EVM Connections
2.3 LED Lights and Switch Functions
Two LED switches and one push-button switch are available on the DRV8873x-Q1EVM to notify the user
of different motor statuses and to control the operation of the motor. The STATUS LED will blink at a
regular interval to provide an indication the MSP430G2553 MCU is powered and code is running. The
nFAULT LED will light when the DRV8873-Q1 device detects an abnormal condition, such as overcurrent,
overtemperature, or open load.
The S1 switch is configured to reset the MSP430G2553 MCU. By moving the J2 jumper to the alternate
position, the switch can be used as a general-purpose input if user-supplied code is installed.
3 GUI Application
The GUI is used to control the DRV8873x-Q1EVM through USB commands. The commands are sent from
the computer to the FTDI FT233RL device, which converts USB commands to UART commands. The
UART commands are received by the MSP430G2553 MCU.
3.1 Installation
Follow these steps to install the GUI application:
Step 1. Double click on the Setup_DRV8873x-y.y.y_EVM.exe file. The y.y.y values shown may
change as the GUI is updated.
Step 2. Click the Yes button in the User Account Control Window to continue (see Figure 3).
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GUI Application
Figure 3. User Account Control
Step 3. Click the Next button in the Setup - DRV8873x window (see Figure 4).
Step 4. Review the license agreement (see Figure 5).
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Figure 4. Setup DRV8873x Window
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