SLA7042 データシートの表示（PDF） - Sanken Electric co.,ltd.
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SLA7042 Datasheet PDF : 4 Pages
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2-Phase Stepper Motor Unipolar Driver ICs (2W1-2 Phase Excitation/Micro-step Support)
SLA7042M/SLA7044M
sCurrent Vector Locus (One step of stepper motor normalized to 90 degrees)
A
100
1
20
B
0
A
To rotate the motor, enter serial data as follows:
2W1-2 phase excitation : Vector 1→2→3→4→5→6→7→8→9 ...
W1-2 phase excitation : Vector 1→3→5→7→9→....
Combined Current A Current B
vector
1-2 phase excitation : Vector 1→5→9
10
2-2 phase excitation : Vector 5 or 10
1
100%
0%
2
34
2
100%
20%
3
91%
40%
5
6
7
4
83% 55.5%
5
71.4% 71.4%
6
55.5%
83%
7
40%
91%
8
9
B
20
40 55.5 71.4 83 91 100
8
20% 100%
9
0% 100%
10
100% 100%
sSerial Data Sequence Example (2W 1-2 Phase Excitation for CW)
Sequence 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 0
DATA-A
MODE 4 3 2 1 0 1 2 3 4 5 6 7 7 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 7 7 6 5 4
DATA-B 4 5 6 7 7 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 7 7 6 5 4 3 2 1 0 1 2 3 4
MODE
A malfunction may occur just after the power (VDD) is turned on because the internal logic is unstable. Therefore, set
the RESET state (REF terminal voltage: VDD−1V to VDD) after the power is turned on.)
sOperation Current Waveform Examples
Stationary waveform
A
0
A
B
0
B
Time
Start
A
0
A
Torque-up waveform at start
B
0
B
Time
Leading phase waveform at acceleration
A
0
A
B
0
B
Time
These three types of waveforms can all be set with a serial signal.
SLA7042M/SLA7044M 47
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