L6258EX

Application information

25/32

Figure 11.

Typical application circuit

4.2

Motor selection

Some stepper motor have such high core losses that they are not suitable for switch mode

current regulation. Furthermore, some stepper motors are not designed for continuous

operating at maximum current. Since the circuit can drive a constant current through the

motor, its temperature might exceed, both at low and high speed operation.

4.3

Unused inputs

Unused inputs should be connected to the proper voltage levels in order to get the highest

noise immunity.

STEPPER

MOTOR

M

12mH 10

Ω

0.33

0.33

21

20

14

35

34

5

OUT2B

SENSE2

OUT2A

SENSE1

OUT1B

OUT1A

PH1

2

I0_1

4

I1_1

3

I2_1

32

I3_1

33

PH2

17

I0_2

15

I1_2

16

I2_2

23

I3_2

22

DISABLE

6

10nF

100nF

1nF

TRI_CAP

7

VS

13,31

VBOOT

12

VCP2

11

VCP1

10

9

GND

1,36

18,19

PWR_GND

VS

27

SIG_GND

28

D97IN626EX

VREF1

26

VREF2

29

EA_IN1

30

EA_OUT1

820pF

1M

25

EA_IN2

24

EA_OUT2

820pF

1M

VREF

8

L6258EX

PWSSO36

PACKAGE

R2 1M

R1 1M