A4982 데이터 시트보기 (PDF) - Allegro MicroSystems

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A4982

DMOS Microstepping Driver with Translator And Overcurrent Protection

Allegro MicroSystems 

A4982

DMOS Microstepping Driver with Translator

And Overcurrent Protection

Description (continued)

results in reduced audible motor noise, increased step accuracy,

and reduced power dissipation.

Internal synchronous rectification control circuitry is provided

to improve power dissipation during PWM operation. Internal

circuit protection includes: thermal shutdown with hysteresis,

undervoltage lockout (UVLO), and crossover-current protection.

Special power-on sequencing is not required.

The A4982 is supplied in two surface mount package, the ET, a

5 mm × 5 mm, 0.90 mm nominal overall package height QFN

package, and the LP package, a 24-pin TSSOP. Both packages have

exposed pads for enhanced thermal dissipation, and are lead (Pb)

free (suffix –T), with 100% matte tin plated leadframes.

Selection Guide

Part Number

Package

A4982SETTR-T

32-pin QFN with exposed thermal pad

A4982SLPTR-T

24-pin TSSOP with exposed thermal pad

Packing

1500 pieces per 7-in. reel

4000 pieces per 13-in. reel

Absolute Maximum Ratings

Characteristic

Load Supply Voltage

Output Current

Logic Input Voltage

Logic Supply Voltage

Motor Outputs Voltage

Sense Voltage

Reference Voltage

Operating Ambient Temperature

Maximum Junction

Storage Temperature

Symbol

VBB

IOUT

VIN

VDD

VSENSE

VREF

TA

TJ(max)

Tstg

Range S

Notes

Rating

35

±2

–0.3 to 5.5

–0.3 to 5.5

–2.0 to 37

–0.5 to 0.5

5.5

–20 to 85

150

–55 to 150

Units

V

A

V

V

V

V

V

ºC

ºC

ºC

Allegro MicroSystems, Inc.

2

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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