SLA7070M, SLA7071M,

SLA7072M, and SLA7073M

Motor Driver ICs

3

www.allegromicro.com

For R products, protection circuits not built-in. FLAG pin is not connected internally.

FUNCTIONAL BLOCK DIAGRAM AND PIN ASSIGNMENTS

Sequencer

&

Sleep Circuit

Synchro

Control

PWM

Control

OSC

Comp

+

-

DAC

Pre-

Driver

PWM

Control

OSC

DAC

Pre-

Driver

Comp

+

-

MIC

Reg.

SenseB

SenseA

Gnd

Sync

RSInt

RSInt

1234

5

6789

10

11

12

13

14

15

16

17

18

19

20 21 22 23

Protect

Protect

Pin No.

Symbol

Functions

Pin No.

Symbol

Functions

1

OutA

Output of phase A

13

Ref / Sleep1

Input for control current and Sleep 1 setting

2

14

VDD

Power supply to logic

3

OutA

Output of phase A

¯

15

Reset

Reset for internal logic

4

16

F / R

Forward / reverse switch input

5

SenseA

Phase A current sensing

17

Sync

Synchronous PWM control switch input

6

NC

No internal connection

18

Flag*

Output from protection circuits monitor

7M1

Commutation and Sleep2 setting

19

SenseB

Phase B current sensing

8M2

20

OutB

Output of phase B

¯

9M3

21

10

Clock

Step clock input

22

OutB

Output of phase B

11

VBB

Main power supply (for motor)

23

12

GND

Ground

*Flag pin active on PR products only; not internally connected for R products.