6

SLA7022MU/SLA7029M/SMA7022MU/SMA7029M

SLA7022MU/SLA7029M/SMA7022MU/SMA7029M

2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation)

sInternal Block Diagram

sDiagram of Standard External Circuit (Recommended Circuit Constants)

6

Reg

Reg

15

8

14

7

2

3

4

121311

9

10

15

+

–

+

–

+

–

+

–

1, 6, 10, 15pin

Description of pins

Excitation input

Active H

OUT A

OUT A

OUT B

OUT B

1pin

6pin

10pin

15pin

Active L

OUT A

OUT A

OUT B

OUT B

81

6

10

15

7

3 13

9

4

12

5

14

+

Rs

Rs

11

2

Open

collector

Excitation signal time chart

2-phase excitation

clock

0

1

2

3

0

1

HH

L

L

H

H

L

HHL

L

H

1-2 phase excitation

clock 0

1

2

3

4

5

6

7

0

1

2

3

H H HH

L

L

L

L

HHH

H

L

LLH

LL

LH L

L

L

H

L

L

H H H H

L

LL

LH

H

L H LLL

H

L

L

L

H

L

L

q tdA and tdB are signals before the inverter stage.

Ω

Ω (VR)

Ω

Ω

Ω

Ω

Ω typ(7022MU)

1

Ω typ(7029M)

(1 to 2W)