2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation)
SLA7032M/SLA7033M
sInternal
Block Diagram
1
8
6
5
7
12
17
16
11
18
Vs A
Vs B
IN B
IN A
IN A
IN B
1, 8, 11, 18pin
Description of pins
Reg.
Oscillator
MOSFET
gate drive
circuit
Synchronous
chopping
circuit
Reg.
Chopping
blanking timer
(5
µ
s typ)
Oscillator
MOSFET
gate drive
circuit
Synchronous
chopping
circuit
Chopping
blanking timer
(5
µ
s typ)
Chopping
OFF timer
(12
µ
s typ)
+
+
Chopping
OFF timer
(12
µ
s typ)
1pin
8pin
11pin
18pin
Excitation input
Active H
Active L
OUT A
OUT A
OUT A
OUT A
OUT B
OUT B
OUT B
OUT B
SYNC A
SYNC B
R
EF
A
R
EF
B
Rs A
9
2
4
3
14
15
13
10
sDiagram
of Standard External Circuit (Recommended Circuit Constants)
Active High
Vcc (46Vmax)
Excitation signal time chart
2-phase excitation
clock
IN
A
IN
A
IN
B
IN
B
IN
A
IN
A
IN
B
IN
B
Active
High
Rs B
GA
GB
+
7
VsA
2
Vb (5V)
12
VsB
8
1
18
11
OUT
A
OUT
A
OUT
B
OUT
B
IN
A
6
0
H
L
H
L
1
L
H
H
L
2
L
H
L
H
3
H
L
L
H
0
H
L
H
L
1
L
H
H
L
r
1
: 4kΩ
r
2
: 1kΩ(VR)
R
s
: 1Ω typ(7032M)
(1 to 2W)
0.68Ω typ(7033M)
SYNC A
SLA7032M
SLA7033M
SYNC B
IN
A
5
IN
B
17
13
IN
B
16
r1
RsA
9
Rs
r2
R
EF
A R
EF
B RsB
3
14
10
Rs
GA
4
GB
15
1-2 phase excitation
clock
IN
A
IN
A
IN
B
IN
B
0
H
L
L
L
1
H
L
H
L
2
L
L
H
L
3
L
H
H
L
4
L
H
L
L
5
L
H
L
H
6
L
L
L
H
7
H
L
L
H
0
H
L
L
L
1
H
L
H
L
2
L
L
H
L
3
L
H
H
L
Active Low
Vcc (46Vmax)
Excitation signal time chart
2-phase excitation
clock
IN
A
IN
A
IN
B
IN
B
IN
A
IN
A
IN
B
IN
B
Active
Low
+
7
VsA
2
Vb (5V)
12
VsB
8
1
18
11
OUT
A
OUT
A
OUT
B
OUT
B
IN
A
6
0
L
H
L
H
1
H
L
L
H
2
H
L
H
L
3
L
H
H
L
0
L
H
L
H
1
H
L
L
H
r
1
: 4kΩ
r
2
: 1kΩ(VR)
R
s
: 1Ω typ(7032M)
(1 to 2W)
0.68Ω typ(7033M)
SYNC A
SLA7032M
SLA7033M
SYNC B
IN
A
IN
B
5
17
13
IN
B
16
r1
RsA
9
Rs
r2
R
EF
A R
EF
B RsB
3
14
10
Rs
GA
4
GB
15
1-2 phase excitation
clock
IN
A
IN
A
IN
B
IN
B
0
L
H
H
H
1
L
H
L
H
2
H
H
L
H
3
H
L
L
H
4
H
L
H
H
5
H
L
H
L
6
H
H
H
L
7
L
H
H
L
0
L
H
H
H
1
L
H
L
H
2
H
H
L
H
3
H
L
L
H
SLA7032M/SLA7033M
29
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