2-Phase Stepper Motor Bipolar Driver IC (2-Phase/1-2 Phase Excitation)
A3966SA/SLB
sTypical
Application
(A3966SLB)
Example of stepper motor drive
1
PHASE
A
ENABLE
A
2
3
4
0.5
5
+5V
6
LOGIC
LOGIC
V
BB
16
15
14
13
0.5
12
11
V
BB
V
CC
V
REF
RC
10
9
+5 V
PHASE
B
ENABLE
B
39 kΩ
+24 V
7
8
680 pF
10 kΩ
56 kΩ
47
µ
F +
I
TRIP
≅I
OUT
+I
SO
≅V
REF
/(4
R
S
)
t
blank
≅1,900
C
T
f
OSC
≅1/
(R
T
C
T
+t
blank
)
R
T
=56kΩ (20kΩ to 100kΩ)
C
T
=680pF(470pF to 1,000pF)
sExternal
Dimensions
A3966SA
16
(Unit: mm)
A3966SLB
9
16
9
0.355
0.204
0.32
0.23
7.11
6.10
10.92
7.62 MAX
BSC
7.60
7.40
10.65
10.00
1.27
0.40
1
1.77
1.15
19.68
18.67
2.54
BSC
8
0.13
MIN
0.51
0.33
1
2
3
10.50
10.10
1.27
BSC
0° to 8°
5.33
MAX
0.39
MIN
0.558
0.356
3.81
2.93
2.65
2.35
0.10 MIN.
56
A3966SA/SLB
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