SLA7024 查看數據表（PDF） - Allegro MicroSystems
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SLA7024 Datasheet PDF : 12 Pages
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SLA7024M, SLA7026M, AND SMA7029M
HIGH-CURRENT PWM,
UNIPOLAR STEPPER MOTOR
CONTROLLER/DRIVERS
TYPICAL STEPPER MOTOR APPLICATIONS
(Half of Device Shown)
SMA7029M
V BB
A
IN B
8
14
VCC
V b +5 V
REG.
TO
CHANNEL
A
VREF
+
13
+
2.4 kΩ
R5
A
OUT B
10
OUT B
15
td
11
+5 V
R 3 47 kΩ
OPEN-COLLECTOR
INVERTER
12
C1
470 pF
C 3 2200 pF
TRUTH TABLES
(SMA7029M Only)
SENSE
9
RS
≤1 Ω
Dwg. EK-008-1
WAVE DRIVE (FULL STEP) for SMA7029M
Sequence
Input A
Input tdA*
Input B
Input tdB*
Output ON
0
1
2
3
0
H
L
L
L
H
L
L
H
L
L
L
H
L
L
L
L
L
L
H
L
A
B
A
B
A
*Logic signals to external open-collector inverter connected to tdA and tdB.
2- PHASE (FULL STEP) OPERATION
for SMA7029M
Sequence
0
1
2
3
0
Input A
H
H
L
L
H
Input B
L
H
H
L
L
Outputs ON A B
AB A B
AB
AB
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