2-Phase Stepper Motor Unipolar Driver ICs (2-Phase/1-2 Phase Excitation)
SDK03M
sInternal
Block Diagram
8
9
1
16
6
IN
1
5
IN
2
7
V
S
1, 8, 9, 16pin Description of pins
Excitation input
Active H Active L
Reg.
14 NC
Pin 1
Pin 16
Pin 8
Pin 9
OUT
1
OUT
2
OUT
2
OUT
1
11 NC
+
–
+
–
R
S
10
R
S
15
R
S
13
GND
4
GND
12
T
D
2
REF
3
sDiagram
of Standard External Circuit (Recommended Circuit Constants)
Active High
V
CC
(46V max)
Excitation signal time chart
2-phase excitation
Phase clock
IN
1
Phase A
IN
2
IN
1
Phase B
IN
2
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 :
r
2 :
r
3 :
r
4 :
r
5 :
r
6 :
C
1 :
C
2 :
C
3 :
C
4 :
R
S
:
510Ω
100Ω (VR)
47kΩ
47kΩ
2.4kΩ
2.4kΩ
470pF
470pF
2200pF
2200pF
1.8Ω typ
+
Motor coil
Phase A
V
b
(5V)
Motor coil
Phase B
1
16 8
9
7
Active
High
IN
1
IN
2
6
OUT
1
OUT
2
IN
1
Phase A
R
S
15
4
10
13
V
S
r
3
r
1
r
4
2
2
7
1
16 8
9
V
S
OUT
1
OUT
2
6
IN
1
Phase B
IN
2
GND
15
10
4
12
5
IN
1
IN
2
SDK03M
5
IN
2
SDK03M
T
D
3
Active
High
T
D
3
GND
12
REF
REF
13
R
S
1-2-phase excitation
Phase clock
IN
1
Phase A
IN
2
IN
1
Phase B
IN
2
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
(1 to 2W)
C
3
R
S
r
5
C
1
r
2
C
2
r
6
C
4
R
S
Active Low
V
CC
(46V max)
+
Motor coil
Phase A
V
b
(5V)
Motor coil
Phase B
Excitation signal time chart
2-phase excitation
Phase clock
0
1
2
3
0
IN
1
L
H
H
L
L
Phase A
IN
2
H
L
L
H
H
IN
1
L
L
H
H
L
Phase B
H H
L
L
H
IN
2
1
H
L
L
H
1
16 8
9
7
Active
Low
IN
1
IN
2
6
OUT
2
OUT
1
IN
1
Phase A
R
S
15
4
10
13
V
S
r
3
r
1
r
4
2
2
7
1
16 8
9
V
S
OUT
2
OUT
1
6
IN
1
Phase B
IN
2
GND
15
10
4
12
5
IN
1
IN
2
SDK03M
5
IN
2
SDK03M
T
D
3
Active
Low
T
D
3
GND
12
REF
REF
13
R
S
1-2-phase excitation
Phase clock
IN
1
Phase A
IN
2
IN
1
Phase B
IN
2
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
(1 to 2W)
r
1 :
r
2 :
r
3 :
r
4 :
r
5 :
r
6 :
C
1 :
C
2 :
C
3 :
C
4 :
R
S
:
510Ω
100Ω (VR)
47kΩ
47kΩ
2.4kΩ
2.4kΩ
470pF
470pF
2200pF
2200pF
1.8Ω typ
C
3
R
S
r
5
C
1
r
2
C
2
r
6
C
4
R
S
SDK03M
37