simple PWM open loop. The 3 motors are control-

led by the micro through 4 latches of 4 bit each.

The loading of these registers is in serial mode.

The I.C. operates at 5V supply for the logic and at

24V supply for the power stages. The packages

are SDIP42 and PLCC44 with 6 pins devoted to

ground and to sink out the heat produced by

power dissipation.

PIN CONNECTION (Top view)

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

Power Supply Voltage

30

V

Logic Supply Voltage

7

V

Logic Input Voltage

V

Low Side DMOS max DC Current

1

A

High Side DMOS max DC Current

1

A

Low Side DMOS max Peak Current (1

µs On; 50µs OFF)

2

A

High Side DMOS max Peak Current (1

µs On; 50µsOFF)

2

A

Max Output Voltage of Stepper Motor Driver (transient

rcirculation)

60

V

Max Voltage ON Vsense (CHA/CHB)

-1 to 2

V

-1 to 2

V

Max DC Current of Forward Diode (DMOS Source Drain Diode)

1

A

Max Peak Current of Forward Diode (DMOS Source Drain

Diode) (1

µs On; 50µs OFF)

2A

Total Power Dissipation (Tpins = 90

°C)

°C)

5

1.6

W

W

Operating Temperature Range

0 to 150

°C

Storage Temperature Range

-40 to 150

°C

THERMAL DATA (PLCC44)

Symbol

Description

SDIP42

PLCC44

Unit

Thermal Resistance Junction-pins

Thermal Resistance Junction-ambient

Max.

Max.

15

48

12

50

°C/W

°C/W

1

2

3

5

64

7

8

9

10

12

11

13

14

15

16

17

39

38

37

36

34

35

33

32

31

30

29

40

41

42

44 43

23

22

21

19

18

20

28

27

26

24 25

PWGND

OUT1A

S1,2A

OUT2A

OUT3A

CLAMPA

S3,4A

OUT4A

BOOT1

BOOT3

GND

PWGND

OUT1B

S1,2B

OUT2B

OUT3B

CLAMPB

S3,4B

OUT4B

VLOW

COSC

GND

D94IN067

PWGND

OUT1A

S1,2A

OUT2A

CLAMPA

S3,4A

OUT3A

OUT4A

BOOT1

1

3

2

4

5

6

7

8

9

VLOW

OUT4B

S3,4B

CLAMPB

OUT3B

OUT2B

S1,2B

OUT1B

PWGND

37

36

35

34

33

31

32

30

29

D94IN060A

10

11

12

13

14

42

41

40

39

38

OUT2C

COM1,2A

VP

COM3,4A

N.C.

COM3,4B

VP

COM1,2B

OUT1C

S1,2C

BOOT3

GND

N.C.

SID

BOOT2

SCK

STB

15

16

VS

A0TH

A1TH

V2

OSC RESET

GND

COSC

28

27

26

24

25

23

22

17

18

19

20

21

PLCC44

SDIP42

L6285

2/16