A4983SETTR-T Allegro, A4983SETTR-T Datasheet

A4983SETTR-T

Manufacturer Part Number

A4983SETTR-T

Description

Manufacturer

Allegro

Datasheets

1.A4983.pdf (16 pages)

2.A4983SETTR-T.pdf (16 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

A4983SETTR-T

Manufacturer:

ALLEGRO/雅丽高

Quantity:

20 000

Company:

Euro Chip Distribution

Part Number:

A4983SETTR-T

Quantity:

100

Current page: 1 of 16
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Features and Benefits

▪ Low R

▪ 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

▪ Very thin profile QFN package

▪ Thermal shutdown circuitry

Package: 28-pin QFN (suffix ET)

4983DS

Approximate size

DS(ON)

outputs

Microcontroller or

Controller Logic

DMOS Microstepping Driver with Translator

Typical Application Diagram

0.22 μF

VDD

MS1

MS2

MS3

SLEEP

STEP

DIR

RESET

ENABLE

REF

VREG

VCP

A4983

ROSC

The A4983 is a complete microstepping motor driver with

CP1

Description

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

bipolar stepper motors in full-, half-, quarter-, eighth, and

sixteenth-step modes, with an output drive capacity of up to

35 V and ±2 A. The A4983 includes a fixed off-time current

regulator which has the ability to operate in Slow or Mixed

decay modes.

The translator is the key to the easy implementation of the

A4983. 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 A4983 interface is an ideal fit for applications where a

complex microprocessor is unavailable or is overburdened.

The chopping control in the A4983 automatically selects the

current decay mode (Slow or Mixed). When a signal occurs at

the STEP input pin, the A4983 determines if that step results

in a higher or lower current in each of the motor phases. If

the change is to a higher current, then the decay mode is set

to Slow decay. If the change is to a lower current, then the

current decay is set to Mixed (set initially to a fast decay for

a period amounting to 31.25% of the fixed off-time, then to a

Continued on the next page…

CP2

0.1 μF

OUT1B

OUT2B

OUT1A

OUT2A

VBB

RS1

RS2

0.1 μF

A4983

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