34

SI-7115B

s External dimensions

(Unit: mm)

Application Note

s Determining the output current Io (motor coil current)

The output current Io can be set to any value by connecting

5.

Fig. A, B and C show the relationship between the

external resistor and the output current, the supply voltage

and the output current, and the output current and the

temperature, respectively.

0.31 to 0.39 (A/ø)

200 (

Ω)

0.95 to 1.05 (A/ø)

1.4 (k

Ω)

°C

2-phase excitation

Holding mode

Motor: 23PM-C109

Fig. A SI-7115B External resistor vs. Output current

Fig. B SI-711B Supply voltage vs. Output current

Fig. C SI-7511B Output current vs. Temperature

Dimensions of SI-7115B pins

11.5±1

4

Plastic package

71.7±0.5

60.3±0.4

Type No.

Lot No.

43.2

P=2.54

0.5

3.4

9.0±0.6

Aluminum

plate

12 3

18

φ

03

4

1.5

1.0

0.5

0

External resistor Rx (k

Ω)

Motor : 23PM-C109

24(V)

3.6(

Ω)

0

2022

242628

30

0

0.5

1.0

1.5

100

Ω

300

Ω

600

Ω

1k

Ω

2k

Ω

Rx

Motor : 23PM-C109

3.9k

Ω

0

100

80

60

40

20

0

0.5

1.0

1.5

Case (aluminium base plate) temperature Tc (°C)

Motor : 103G-775-1240

Ω

Ω