ST EVSPIN948 User manual

Introduction
The EVSPIN948 dual brushed DC motor driver expansion board is based on the STSPIN948.
It provides an affordable and easy-to-use solution for the implementation of brushed DC motor driving applications. Thanks to
the parallel operation, it can be easily converted to a single brushed DC motor driver with double current capability. In addition to
the internal current limiters, the integrated amplifiers allow it to be used in systems with external current control. The
EVSPIN948 is compatible with the Arduino UNO R3 connector and most STM32 Nucleo boards.
Figure 1. EVSPIN948 expansion board
Getting started with the EVSPIN948 dual brushed DC motor driver expansion
board based on the STSPIN948
UM3206
User manual
UM3206 - Rev 1 - July 2023
For further information contact your local STMicroelectronics sales office.
www.st.com

1 Safety precautions
Warning: Some of the components mounted on the board could reach hazardous temperatures
during operation.
While using the board, please follow the following precautions:
• Do not touch the components or the heatsink.
• Do not cover the board.
• Do not put the board in contact with flammable materials or with materials releasing smoke when heated.
• After operation, allow the board to cool down before touching it.
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Safety precautions
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2 Getting started
The main features of the EVSPIN948 expansion board are:
• Voltage range from 5 V to 58 V
• Phase current up to 5 A r.m.s for each motor
• Adjustable output slew rate
• Five different driving modes
• Two independent current limiters with adjustable OFF time
• Two integrated amplifiers with fixed gain
• Full protection set including: overcurrent, undervoltage lock out and thermal shutdown
• Compatibility with Arduino UNO R3 connector and STM32 Nucleo boards
The EVSPIN948 evaluation board is ready to be used in few steps. Follow this procedure to start your evaluation:
1. Check the setting of the jumpers based on your configuration as described in Section 3 Hardware
description and configuration
2. Connect the board with the STM32 Nucleo board through the Arduino UNO R3
3. Supply the board through the input 2 (VS) and 1 (ground) of the connector CN1
Further support material is available on the STSPIN948 product page www.st.com
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Getting started
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3 Hardware description and configuration
Figure 2. EVSPIN948 overview
The following tables provide the detailed pinout of the Arduino UNO R3 and ST Morpho connectors.
Table 1. Arduino UNO R3 connector table
Connector Pin(1) Signal Remarks
CN5
2 Offset enable (operational amplifier A)
3 Standby (active low)
4 Offset enable (operational amplifier B)
5 Enable bridge B
6 Operational amplifier A output
7 Ground
CN9
3 Voltage reference current limiter A
5 PWM1A input
6 PHA input
7 Enable bridge A
CN6
2 VDD
6 Ground
7 Ground
CN8
1 PHB input
2 PWM1B input
3 TOFFA signal Digital output in
PWM trimming mode
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Hardware description and configuration
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Connector Pin(1) Signal Remarks
CN8
4 Voltage reference current limiter B
5 TOFFB signal Digital output in
PWM trimming mode
6 Operational amplifier B output
1. All non-listed pins are not connected.
3.1 Driving mode selection
The EVSPIN948 can drive up to 2 DC motors at the same time.
The driving mode selection is done setting J5 and J6 jumpers (connected to MODE1 and MODE2 pins of the
device) on the top of the boards.
The table below briefly summarizes the possible configurations:
J5 J6 Driving mode Typical application
Max output
current (each
motor)
Output
RDS(ON)
Minimum
OCD
threshold
1-2 1-2 Reserved
1-2 2-3 Dual full bridge 2 x bidirectional brushed DC
(Figure 3)5 Arms 0.4 Ω 7 A
2-3 1-2 Dual half bridge
2 x high current unidirectional
brushed DC(1) (Figure 4)10 Arms
0.2 Ω
14 A
1 x high current bidirectional
brushed DC (Figure 5)0.4 Ω
2-3(2) 2-3(2) Dual full bridge with
mixed decay
2 x bidirectional brushed DC
or
Bipolar stepper
(Figure 3)
5 Arms 0.4 Ω 7 A
1. The motors can be connected between OUT and either VS (like in the figure) or GND. In the latter case, the current limiter
must be disabled. Motors can also be connected between OUT and LSS (without the need of disabling the current limiter),
soldering one of the motor cables directly to R12 or R13.
2. This configuration is only available with current limiter in Fixed OFF time mode (see Section 3.2)
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Driving mode selection
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Figure 3. Two bidirectional DC motors
B-
B+
A+
A-
M
M
VVS
GND
+
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Driving mode selection
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Figure 4. Two unidirectional DC motors – higher current
B+
B-
A-
A+
M
VVS
GND
M
+
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Driving mode selection
UM3206 - Rev 1 page 7/18

Figure 5. One bidirectional DC motor - higher current
+
B+
B-
A-
A+
VVS
GND
M
3.2 Current limiter mode
The behavior of the current limiter can be changed by setting the J7 jumper (connected to MODE3 of the device)
as follows:
Table 2. Current limiter mode settings
J7 Current limiter mode J2 and J3 Decay time
1-2 Fixed OFF time Closed Depending on R6 and R7 resistors
(Figure 6)
2-3 PWM trimming Open Depending on PWM input signals
In Fixed OFF time mode, the current limiter A and current limiter B can be disabled by setting R6 and R7
to their minimum value respectively.
The current threshold can be set in two different ways:
• Trimming R41 and R46 resistors, leaving CN9.3 and CN8.4 floating
• Applying a square wave with variable duty cycle to CN9.3 and CN8.4, setting R41 and R46 to their
minimum value
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Current limiter mode
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Figure 6. tOFF versus ROFF
3.3 Output slew rate
The output slew rate can be increased moving the rotative switch SW1 clockwise. With the STSPIN948 device,
the slew rate value can be chosen from four different values, as shown in Table 3.
Table 3. Slew rate settings
SW1 RSR Slew rate (typ. at VS = 58 V)
C-1 closed 10 kΩ 0.3 V/ns
C-2 closed 5.6 kΩ 0.6 V/ns
C-3 closed 2.2 kΩ 1.2 V/ns
C-4 closed 1 kΩ 2 V/ns
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Output slew rate
UM3206 - Rev 1 page 9/18

4 Thermal performance
An example of the thermal performances of the EVSPIN948 is provided in Figure 7 . The board is used in full-
bridge and parallel half-bridge configuration in a typical application to drive an inductive load with different output
currents ranging from 0.5 A to 3 A.
Set-up conditions:
•Planar orientation of the board and natural convection only
•Tambient = 25 °C
•PWM frequency = 20 KHz
•VS = 30 V
•Output slew rate setting = 2 V/ns
Figure 7. EVSPIN948 - thermal performances
0
20
40
60
80
100
120
140
0 1 2 3
Maximum
temperature [°C]
Output current
[ARMS]
Parallel half bridge
Full bridge
Figure 8. Thermal images (IOUT = 2ARMS)
Full-bridge configuration Parallel half-bridge configuration
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Thermal performance
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5 Bills of material
Table 4. EVSPIN948 bill of material
Item Qty. Ref. Description Part/Value Manufact. Order code
1 1 CN1 Connector 5.08 mm close vertical MORSV-508-2P_screw Wurth Elektronic 691312510002 or equivalent
2 1 CN2 Connector 5.08 mm close vertical MORSV-508-4P_screw Wurth Elektronic 691312510004 or equivalent
3 1 CN5 Connector through-hole-pitch 2.54 CON-1x10 Samtec SSQ-110-04-F-S
4 2 CN6,CN9 Connector through-hole-pitch 2.54 CON-1x8 Samtec SSQ-108-04-F-S
5 2 CN7,CN10 Connector through-hole-pitch 2.54 N.M. Samtec ESQ-119-24-G-D
6 1 CN8 Connector through-hole-pitch 2.54 CON-1x6 Samtec SSQ-106-04-F-S
7 3 C1,C15,C16 SMT ceramic capacitor 100 n 15 V
8 1 C2 SMT ceramic capacitor 1 u 15 V
9 2 C3,C4 Through-hole aluminum elect.
capacitor 220 u 100 V Panasonic EEUFS2A221B
10 1 C5 SMT ceramic capacitor 220 n 15 V
11 3 C6,C7,C8 SMT ceramic capacitor 1 n 15 V
12 2 C9,C10 SMT ceramic capacitor 100 p 15 V
13 2 C11,C12 SMT ceramic capacitor 10 n 15 V
14 2 C17,C18 SMT ceramic capacitor 470 n 100 V
15 1 C19 SMT ceramic capacitor 100 n 100 V
16 4 D1,D2,D3,D4 Yellow LED Yellow
17 2 D5,D6 Red LED Red
18 1 SW1 Rotative switch x4 ROT-SWITCH Nidec CS-4-14-NTB or equivalent
19 2 J2,J3 Header connector 1x2 pins Closed
20 3 J5,J6,J7 Header connector 1x3 pins Closed 1-2
21 2 Q1,Q2,Q3,Q4 P MOSFET MOSFET P NXP NX3008PBKW
22 1 R1 SMT resistor 22 k 1/10 W
23 3 R2,R24,R31 SMT resistor 1 k 1/10 W
24 1 R3 SMT resistor 2.2 k 1/10 W
25 1 R4 SMT resistor 5.6 k 1/10 W
26 3 R5,R44,R49 SMT resistor 10 k 1/10 W
27 2 R6,R7 1/4" square trimpot trimming
potentiometer, top adjust 500 k Bourns 3266W-1-504 LF
28 4 R8,R9 SMT resistor 4.7 k 1/10 W
29 4
R12,R13,R14,
R15
SMT resistor 0.05 1% 3 W Bourns CRA2512-FZ-R050ELF
30 4
R16,R17,R18,
R19
SMT resistor 10 k 1/2 W
31 2 R20,R22 SMT resistor 39 k 1/10 W
32 4
R21,R23,R42,
R47
SMT resistor 330 R 1/10 W
33 14
R25,R26,R27,
R28,R29,R30,
R32,R33,R34,
R35,R36,R37,
R38,R39
SMT resistor 0 R 1/10 W
34 2 R40,R45 SMT resistor 47 k 1/10 W
35 2 R41,R46 1/4" square trimpot trimming
potentiometer, top adjust 1 k Bourns 3266W-1-102 LF
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Bills of material
UM3206 - Rev 1 page 11/18

Item Qty. Ref. Description Part/Value Manufact. Order code
36 2 R43,R48 SMT resistor 3.3 k 1/10 W
37 10
TP1,TP2,TP3,
TP4,TP5,TP6,
TP7,TP8,TP9,
TP10
Test point TP-SMD-S1751-46R Harwin S1751-46R
38 1 U1 STSPIN948 STSPIN948
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Bills of material
UM3206 - Rev 1 page 12/18

6 Schematic diagrams
Figure 9. EVSPIN948 schematic diagram
ST
NUCLEO & LOGO
FOR EVALUATION PURPOSE ONLY
ROHS COMPLIANT 2002/95/IEC & LOGO
1A
2A
1B
2B
VDD
GND GND
VS 0 - 58V
VS
GND
TOFFA
TOFFB
VB
REFA REFB
M1 M2 M3
REFB
REFA
TOFFA
TOFFB
ENA
PHB
PWM1B
PHA
PWM1A
REFB
VA
STBY
OSETA
ENB
OSETB
REFA
EN_nF AULTA
ENA_ MCU
EN_nF AULTB
ENB_MCU
nS T DBY
P W M1A
P W M1B
P HA
P HB
EN_nF AULTA
EN_nF AULTB
MODE 1
MODE 1 MODE 2
RE FA
RE FB
OFFSE TA
OUT2B
OUT1A
OUT2A
OUT1B
OUT2A
OUT1A
OUT2B
OUT1B
TOFFB
VB
OFFSE TB
S R
RE FA_MC U
RE FB_ MCU
MODE 2
MODE 3
MODE 3
TOFFB
VBVA
RE FA R EF B
P HB
P W M1B
P W M1A
P HA
ENA_ MCU
TOFFA
RE FB_ MCU
RE FA_MC U
nS T DBY
OF F S ETA
OF F S ETB
VA
ENB_MCU
TOFFA
VDD
VDD
VDD VDD
VDD VDD
VS
VS
VDD VDD
VDD
VDD
VDD
TP 7
R4
5.6k
R2 9 0R
CN8
CO N-1x6
S TR IP 2 54 P -F-6
1
2
3
4
5
6
R3 4 0R
R3 1 1k
R9
4.7k
CN9
CO N-1x8
1
2
3
4
5
6
7
8
D2
YELLOW
1 2
R2 8 0R
R6
50 0k
R3 0 0R
R3 6 0R
R4 8
3.3k
R3 5 0R
C1 5
10 0n
TP 4
R3 2 0R
TP 1
R2 5 0R
C1 8
47 0n
Q3
MOS FET P
2
1
3
R2 6 0R
R1 6
10K
R2
1k
CN7
CO N-2x1 9
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
S W 1
2
3
4
1
C
NC
D3
YELLOW
1 2
R4 1
1k
TP 2
Q4
MOS FET P
2
1
3
R2 3
33 0R
C1 9
10 0n
R2 4 1k
R3
2.2k
C1 6
10 0n
TP 3
R4 4
10k
R1 3
0.05R 3W
D5
Re d
1 2
CN10
CO N-2x1 9
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
CN2
1
2
3
4
D6
Re d
1 2
C3
22 0u 8 0V
D1
YELLOW
1 2
R4 9
10 k
J 6
CO N3
1
2
3
C6
1n
C9
10 0p
U1
S TS P IN94 8
OUT2A 4 7
LSS 2A 4
VS 41 VS 42
OUT2A 4 8
LSS 2A 3
OUT1A 4 6
OUT1A 4 5
LSS 1A 2
LSS 1A 1
OUT2B 3 8
OUT2B 3 7
LSS 2B 34
LSS 2B 33
OUT1B 4 0
OUT1B 3 9
LSS 1B 36
LSS 1B 35
VS 44 VS 43
VSP UMP 6
CP 2 8 CP 1 7
VBOOT 9
nS TDBY
13
EN/nFAULTA
19
EN/nFAULTB
20
PWM1A
14
PHA
15
PWM1B
16
PHB
17
VDD 18
REF A
21
REF B
22
TOFF A
23
TOFF B
24
MODE2
29 MODE1
30
SR
31
GND
5
GND
32
EP AD
49
OF FS E TA
12
OF FS E TB
25
SENSEA 1 0
VA
11
SENSEB 2 7
VB
26
MODE3
28
R2 2
39k
R4 0
47k
R3 8 0R
C1
10 0n
R4 6
1k
C1 2
10n
R4 2
33 0R
R2 7 0R
C1 0
10 0p
C1 1
10n
J 2
1 2
R3 9 0R
C7
1n
CN1
1
2
TP 8
R510 k
R1 9
10 K
TP 1 0
R3 7 0R
Q1
MOS FET P
2
1
3
J 3
1 2
TP 6
R1 2
0.05R 3W
C5
22 0n
R4 5
47 k
R1
22 k
CN5
CO N-1x1 0
1
2
3
4
5
6
7
8
9
10
TP 9
C1 7
47 0n
J 5
CO N3
1
2
3
Q2
MOS FET P
2
1
3
R2 1
33 0R
CN6
CO N-1x8
S TR IP 2 54 P -F-8
1
2
3
4
5
6
7
8
C4
22 0u 8 0V
R4 7
33 0R
TP 5
D4
YELLOW
1 2
R1 7
10K
R7
50 0k
C8
1n
J 7
CO N3
1
2
3
R1 8
10 K
R4 3
3.3k
R2 0
39 k
C2
1u
R8
4.7k
R3 3 0R
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Schematic diagrams
UM3206 - Rev 1 page 13/18

Revision history
Table 5. Document revision history
Date Version Changes
07-Jul-2023 1 Initial release.
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Contents
1Safety precautions.................................................................2
2Getting started ....................................................................3
3Hardware description and configuration ...........................................4
3.1 Driving mode selection ..........................................................5
3.2 Current limiter mode ............................................................8
3.3 Output slew rate ...............................................................9
4Thermal performance .............................................................10
5Bills of material...................................................................11
6Schematic diagrams ..............................................................13
Revision history .......................................................................14
List of tables ..........................................................................16
List of figures..........................................................................17
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Contents
UM3206 - Rev 1 page 15/18

List of tables
Table 1. Arduino UNO R3 connector table .........................................................4
Table 2. Current limiter mode settings ............................................................8
Table 3. Slew rate settings ...................................................................9
Table 4. EVSPIN948 bill of material ............................................................ 11
Table 5. Document revision history ............................................................. 14
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List of tables
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List of figures
Figure 1. EVSPIN948 expansion board .........................................................1
Figure 2. EVSPIN948 overview ...............................................................4
Figure 3. Two bidirectional DC motors...........................................................6
Figure 4. Two unidirectional DC motors – higher current ..............................................7
Figure 5. One bidirectional DC motor - higher current ................................................8
Figure 6. tOFF versus ROFF ..................................................................9
Figure 7. EVSPIN948 - thermal performances .................................................... 10
Figure 8. Thermal images (IOUT = 2ARMS)...................................................... 10
Figure 9. EVSPIN948 schematic diagram ....................................................... 13
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List of figures
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