A4982 datasheet, PDF - EEWORLD Datasheet

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A4982: DescriptionSTEPPER MOTOR CONTROLLER, 2 A, PDSO24; Categorysemiconductor Analog mixed-signal IC; File Size1MB，20 Pages; ManufacturerAllegro; Websitehttp://www.allegromicro.com/

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A4982 Overview

STEPPER MOTOR CONTROLLER, 2 A, PDSO24

A4982 Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	24
Maximum operating temperature	85 Cel
Minimum operating temperature	-20 Cel
Maximum supply/operating voltage	5.5 V
Minimum supply/operating voltage	3 V
Rated supply voltage	3.3 V
Processing package description	Lead FREE, MO-153ADT, TSSOP-24
Lead-free	Yes
EU RoHS regulations	Yes
state	ACTIVE
Craftsmanship	NMOS
packaging shape	Rectangle
Package Size	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
surface mount	Yes
Terminal form	GULL WING
Terminal spacing	0.6500 mm
terminal coating	NOT SPECIFIED
Terminal location	pair
Packaging Materials	Plastic/Epoxy
Temperature level	other
Maximum output current	2 A
Analog IC other types	Stepper Motor Controller

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A4982

DMOS Microstepping Driver with Translator

And Overcurrent Protection

Features and Benefits

▪

Low R

DS(ON)

outputs

Automatic current decay mode detection/selection

Mixed and Slow current decay modes

Synchronous rectification for low power dissipation

Internal UVLO

Crossover-current protection

3.3 and 5 V compatible logic supply

Thin profile QFN and TSSOP packages

Thermal shutdown circuitry

Short-to-ground protection

Shorted load protection

Low current Sleep mode, < 10 µA

No smoke no fire (NSNF) compliance (ET package)

32-contact QFN

The A4982 is a complete microstepping motor driver with

built-in translator for easy operation. It is designed to operate

bipolar stepper motors in full-, half-, quarter-, and sixteenth-step

modes, with an output drive capacity of up to 35 V and ±2 A.

The A4982 includes a fixed off-time current regulator which

has the ability to operate in Slow or Mixed decay modes.

The ET package meets customer requirements for no smoke

no fire (NSNF) designs by adding no-connect pins between

critical output, sense, and supply pins. So, in the case of a

pin-to-adjacent-pin short, the device does not cause smoke

or fire. Additionally, the device does not cause smoke or fire

when any pin is shorted to ground or left open.

The translator is the key to the easy implementation of the

A4982. Simply inputting one pulse on the STEP input drives

the motor one microstep. There are no phase sequence tables,

high frequency control lines, or complex interfaces to program.

The A4982 interface is an ideal fit for applications where a

complex microprocessor is unavailable or is overburdened.

During stepping operation, the chopping control in the A4982

automatically selects the current decay mode, Slow or Mixed.

In Mixed decay mode, the device is set initially to a fast decay

for a proportion of the fixed off-time, then to a slow decay for

the remainder of the off-time. Mixed decay current control

Description

Packages

with exposed thermal pad

5 mm × 5 mm × 0.90 mm

(ET package)

Approximate size

24-pin TSSOP

with exposed thermal pad

(LP Package)

Continued on the next page…

Typical Application Diagram

0.22 µF

VREG ROSC

VDD

5 kΩ

Microcontroller or

Controller Logic

SLEEP

STEP

MS1

MS2

DIR

ENABLE

RESET

VREF

GND

OUT2A

OUT2B

SENSE2

0.1 µF

0.22 µF

CP1

CP2

VCP

VBB1

VBB2

OUT1A

100 µF

A4982

OUT1B

SENSE1

4982-DS Rev. 5

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