Datasheet > A3980_06

A3980_06

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
18页	504K
描述
Automotive DMOS Microstepping Driver with Translator

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A3980_06 数据手册

A3980

Automotive DMOS Microstepping Driver with Translator

Features and Benefits

Description

▪ Typical application up to ±1 A, 35 V output rating

▪ Low R_DS(ON)outputs, 0.67 Ω source, 0.54 Ω sink typical

▪ Automatic current decay mode detection/selection

▪ 3.0 V to 5.5 V logic supply voltage range

▪ Mixed, fast, and slow current decay modes

▪ Synchronous rectification for low power dissipation

▪ Internal OVLO, UVLO, and thermal shutdown circuitry

▪ Crossover current protection

The A3980 is a complete microstepping motor driver with

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

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

step modes, at up to 35 V and ±1 A. The A3980 includes a

fixedoff-timecurrentregulatorwhichhastheabilitytooperate

in slow, fast, or mixed decay modes. This results in reduced

audible motor noise, increased step accuracy, and reduced

power dissipation.

▪ Short to supply/ground and short/low load current

diagnostics

The translator is the key to the easy implementation of the

A3980. Simply inputting one pulse on the step input drives

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

highfrequencycontrollines,orcomplexinterfacestoprogram.

The A3980 interface is an ideal fit for applications where a

complex μP is unavailable or overburdened.

Package: 28 pin TSSOP with exposed

thermal pad (suffix LP)

Internalsynchronousrectificationcontrolcircuitryisprovided

to improve power dissipation during PWM operation.

Internal circuit protection includes: thermal shutdown with

hysteresis,overvoltagelockout(OVLO),undervoltagelockout

(UVLO), and crossover current protection. Special power-up

sequencingisnotrequired.Inaddition,twodiagnosticfaultflags

provide indication of shorts or opens on the motor windings.

The A3980 is supplied in a low-profile (1.1 mm) 28L TSSOP

with exposed thermal pad. This device is available also in a

lead-free version (leadframe plating 100% matte tin).

Approximate Size

Typical Application

26184.26C

12 3 4 5 6 7...18

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