A3967SLBT Allegro Micro Systems, Inc., A3967SLBT Datasheet

A3967SLBT

Manufacturer Part Number

A3967SLBT

Description

SOP24

Manufacturer

Allegro Micro Systems, Inc.

Datasheet

1.A3967SLBTR-T.pdf (16 pages)

Specifications of A3967SLBT

Date_code

05+

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Download datasheet (388Kb)

Load Supply Voltage, V

Output Current, I

Logic Supply Voltage, V

Logic Input Voltage Range, V

Sense Voltage, V

Reference Voltage, V

Package Power Dissipation,

Operating Temperature Range,

Junction Temperature, T

Storage Temperature Range,

* 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°C.

ABSOLUTE MAXIMUM RATINGS

SUPPLY

Continuous ..................... ±750 mA

Peak ................................. ±850 mA

SENSE

SLEEP

OUT

LOAD

STEP

GND

REF

................................. See page 8

........................... -20°C to +85°C

......................... -55°C to +150°C

DIR

>30 ns) ............. -0.3 V to +7.0 V

<30 ns) ................ -1 V to +7.0 V

at T

BB2

÷8

TRANSLATOR

& CONTROL

OUT

SENSE

LOGIC

= +25°C

REF

TIMER

MICROSTEPPING DRIVER WITH TRANSLATOR

PWM

............... 0.68 V

................ V

BB1

......... +150°C

............. 30 V

........... 7.0 V

Dwg. PP-075-2

PFD

RESET

OUT

LOAD

SUPPLY

SENSE

OUT

ENABLE

LOGIC

SUPPLY

GND

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 ±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.

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 µP is unavail-

able or over-burdened.

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

Special power-up sequencing is not required.

fused pins for enhanced thermal dissipation. The pins are at ground

potential and need no insulation. A lead (Pb) free (100% matte tin

leadframe) version is also available.

FEATURES

footnote are in production but have been determined to be LAST TIME BUY. This

classification indicates that sale of this device is currently restricted to existing

customer applications. The variants should not be purchased for new design

applications because obsolescence in the near future is probable. Samples are no

longer available. Status change: October 31, 2006. Deadline for receipt fo LAST TIME

BUY orders: April 27, 2007. These variants include: A3967SLB and A3967SLBTR.

3967

Pb-based variants are being phased out of the product line. The variants cited in this

A3967SLBTR-T

A3967SLB-T

Part Number

The A3967SLB is a complete microstepping motor driver with

The translator is the key to the easy implementation of the

Internal circuit protection includes thermal shutdown with hyster-

The A3967SLB is supplied in a 24-pin SOIC with four internally

±750 mA, 30 V Output Rating

Satlington

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

Pb-free*

Yes

Sink Drivers

24-Lead SOIC

Package

1000 per reel

31 per tube

Packing

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