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L6228

APPLICATION INFORMATION

A typical Bipolar Stepper Motor Driver application using L6228 is shown in Fig. 23. Typical component values

for the application are shown in Table 2. A high quality ceramic capacitor in the range of 100 to 200 nF should

filtering on the power supply and reduce high frequency transients generated by the switching. The capacitor

connected from the EN input to ground sets the shut down time when an over current is detected (see Overcur-

resistors with a trace length as short as possible in the layout. The sense resistors should be non-inductive re-

sistors to minimize the di/dt transients across the resistor. To increase noise immunity, unused logic pins (except

EN) are best connected to 5V (High Logic Level) or GND (Low Logic Level) (see pin description). It is recom-

mended to keep Power Ground and Signal Ground separated on PCB.

Table 2. Component Values for Typical Application

Figure 23. Typical Application

100µF

1N4148

100nF

1N4148

1nF

39K

Ω

1nF

39K

Ω

220nF

100K

Ω

10nF

100

Ω

5.6nF

0.6

Ω

68nF

0.6

Ω

M

CLOCK

1

5

21

18

19

8

16

GND

GND

GND

GND

POWER

GROUND

SIGNAL

GROUND

+

-

24

VCP

VBOOT

20

CW/CCW

CLOCK

CW/CCW

2

6

7

11

RESET

EN

RESET

ENABLE

23

HALF/FULL

HALF/FULL

12

CONTROL

FAST/SLOW DECAY

13

14

4

17

3

15

22

10

9

D01IN1341