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3967

MICROSTEPPING DRIVER

WITH TRANSLATOR

REF

RC

2

SLEEP

OUT

2B

LOAD

SUPPLY

2

GND

GND

SENSE

2

OUT

2A

STEP

DIR

MS

1

1

2

3

4

5

6

7

8

9

10

11

12

TRANSLATOR

& CONTROL

LOGIC

V

CC

V

BB2

V

BB1

梅8

PWM

TIMER

24

PFD

23 RC

1

22 RESET

21 OUT

1B

LOAD

20 SUPPLY

1

19

18

17

16

GND

GND

SENSE

1

OUT

1A

The A3967SLB is a complete microstepping motor driver with

built-in translator. It is designed to operate bipolar stepper motors in

full-, half-, quarter-, and eighth-step modes, with output drive capabil-

ity of 30 V and 鹵750 mA. The A3967SLB includes a fixed off-time

current regulator that has the ability to operate in slow, fast, or mixed

current-decay modes. This current-decay control scheme results in

reduced audible motor noise, increased step accuracy, and reduced

power dissipation.

The translator is the key to the easy implementation of the

A3967SLB. By simply inputting one pulse on the STEP input the

motor will take one step (full, half, quarter, or eighth depending on two

logic inputs). There are no phase-sequence tables, high-frequency

control lines, or complex interfaces to program. The A3967SLB

interface is an ideal fit for applications where a complex 碌P is unavail-

able or over-burdened.

Internal circuit protection includes thermal shutdown with hyster-

esis, under-voltage lockout (UVLO) and crossover-current protection.

Special power-up sequencing is not required.

The A3967SLB is supplied in a 24-lead SOIC with copper batwing

tabs. The tabs are at ground potential and need no insulation. A lead-

free (100% matte tin leadframe) version is also available.

Data Sheet

26184.24C

15 ENABLE

14

13

LOGIC

SUPPLY

MS

2

Dwg. PP-075-2

ABSOLUTE MAXIMUM RATINGS

at T

A

= +25擄C

Load Supply Voltage, V

BB

.............

30 V

Output Current, I

OUT

Continuous .....................

鹵750 mA

*

Peak .................................

鹵850 mA

Logic Supply Voltage, V

CC

...........

7.0 V

Logic Input Voltage Range, V

IN

(t

w

>30 ns) .............

-0.3 V to +7.0 V

(t

w

<30 ns) ................

-1 V to +7.0 V

Sense Voltage, V

SENSE

...............

0.68 V

Reference Voltage, V

REF

................

V

CC

Package Power Dissipation,

P

D

.................................

See page 8

Operating Temperature Range,

T

A

...........................

-20擄C to +85擄C

Junction Temperature, T

J

.........

+150擄C

Storage Temperature Range,

T

S

.........................

-55擄C to +150擄C

* Output current rating may be limited by

duty cycle, ambient temperature, and heat

sinking. Under any set of conditions, do not

exceed the specified current rating or a

junction temperature of 150擄C.

FEATURES

s

s

s

s

s

s

s

鹵750 mA, 30 V Output Rating

Satlington鈩?Sink Drivers

Automatic Current-Decay Mode Detection/Selection

3.0 V to 5.5 V Logic Supply Voltage Range

Mixed, Fast, and Slow Current-Decay Modes

Internal UVLO and Thermal Shutdown Circuitry

Crossover-Current Protection

Always order by complete part number:

Part Number

A3967SLB

A3967SLB-T

Package

24-lead batwing SOIC

24-lead batwing SOIC; Lead-free

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• 3967
  英文版
  MICROSTEPPING DRIVER WITH TRANSLATOR
  
  3967
• 3967
  英文版
  MICROSTEPPING DRIVER WITH TRANSLATOR
  ALLEGRO [A...
  3967

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