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•
Select (J3) is used to configure motor speed-control resources for the PWM pin. Set the PWM jumper
to PWMIN for sending a PWM signal to the PWM pin to control motor speed. See
details. Set the PWM jumper to Analog with J2 connected for using potentiometer (R5) to control motor
speed. See
Figure 3
•
J7 and J11 Connections are placeholders for an I
•
Potentiometer Power (J2) provides voltage from the V1P8 pin of the DRV10974 device to power the
potentiometer. This header must be jumpered to use the potentiometer.
6.2
Switch
The S1 switch allows the applied power supply voltage to reach the rest of the board. A fuse is used to
protect the device from overcurrent. Turn the switch to the On position to power the EVM.
6.3
Test Points
Test points are provided and labeled according to the inputs and outputs of the DRV10974 motor driver
(see
Table
4).
TEST POINT
TP1
TP2
TP3
TP4
TP5
SLVUB95C – December 2017 – Revised August 2018
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Figure 11. Speed Command Input Select Header (J3)
for more details.
Figure 12. Potentiometer Power Header (J2)
Table 4. Test Point Descriptions
NAME
Power In
VCC
U Phase
V Phase
W Phase
Copyright © 2017–2018, Texas Instruments Incorporated
2
C interface, so they can be ignored.
DESCRIPTION
Used to power board in conjunction with
the switch (S1)
Used to power board and bypass the
switch (S1)
Input for 1 of the 3 motor phase
windings of the BLDC motor
Input for 1 of the 3 motor phase
windings of the BLDC motor
Input for 1 of the 3 motor phase
windings of the BLDC motor
DRV10974 Evaluation Module
User Interface
Figure 4
for more
11
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