A4970SLBTR-T Allegro Microsystems Inc, A4970SLBTR-T Datasheet

A4970SLBTR-T

Manufacturer Part Number

A4970SLBTR-T

Description

IC PWM MOTOR DVR FULL 24-SOICW

Manufacturer

Allegro Microsystems Inc

Datasheets

1.A4970GLBTR-T.pdf (9 pages)

2.A4970GLBTR-T.pdf (9 pages)

3.A4970GLBTR-T.pdf (9 pages)

Specifications of A4970SLBTR-T

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

A4970SLBTR-T

Manufacturer:

ALLEGRO/雅丽高

Quantity:

20 000

Company:

H&T Electronics

Part Number:

A4970SLBTR-T

Quantity:

1 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

A4970SLBTR-T1

Manufacturer:

ALLEGRO/雅丽高

Quantity:

20 000

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Download datasheet (281Kb)

Features and Benefits

▪ 750 mA continuous output current

▪ 45 V output sustaining voltage

▪ Internal clamp diodes

▪ Internal PWM current control

▪ Low output saturation voltage

▪ Internal thermal shutdown circuitry

▪ Pin compatible with UDx2916

▪ DMOS outputs

A4970DS

Package: 24-pin batwing wide SOIC

(package LB)

Not to scale

Channel 1

pin numbers

shown.

I 1

Preliminary Datasheet

VREF

Divide by

1, 1.5, or 3

PWM Current-Control Circuitry

Dual Full-Bridge PWM Motor Driver

OUTA

Subject to Change Without Notice March 9, 2011

R S

VBB

OUTB

Description

The A4970 motor driver drives both windings of a bipolar stepper

motor or bidirectionally controls two DC motors. Both bridges

are capable of sustaining 45 V and include internal pulse-width

modulation (PWM) control of the output current to 750 mA.

For PWM current control, the maximum output current is

determined by user selection of a reference voltage and sensing

resistor. Two logic-level inputs select output current limits of

0%, 33%, 67%, or 100% of the maximum level. A PHASE input

to each bridge determines load current direction.

Intrinsic diodes in the MOSFET output structure protect

against inductive transients. Internally generated delays prevent

crossover currents when switching current direction. Special

power-up sequencing is not required. Thermal protection

circuitry disables the outputs if the chip temperature exceeds

safe operating limits.

The device is supplied in a 24-pin surface-mount wide SOIC with

two pairs of batwing leads (LB). The webbed-pin construction

provides for maximum package power dissipation in the smallest

possible construction. The package is lead (Pb) free, with 100%

matte tin leadframe plating.

R C

SENSE

–

SHOT

ONE

SOURCE

DISABLE

A4970

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