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Hardware and Software Overview
3
SLVUB68 – October 2017
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Copyright © 2017, Texas Instruments Incorporated
DRV8873x-Q1EVM User’s Guide
2
Hardware and Software Overview
WARNING
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.
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.