A3977SED - Allegro MicroSystems

Manufacturer Part Number

A3977SED

Manufacturer

Allegro Microsystems

Introduction

The A3977SED is a fully integrated motor driver designed for controlling bipolar stepper motors, providing a sophisticated yet easy-to-use control interface for various applications.

Product Features and Performance

Integrated driver functionality for bipolar stepper motors

Supports step resolutions of 1, 1/2, 1/4, 1/8 for precision motion control

Operates across a wide voltage range (3V ~ 5.5V for logic and 8V ~ 35V for motor operation)

High-temperature operation up to 150°C (TJ)

DMOS technology for high performance and efficiency

Half-Bridge output configuration enabling control over two phases of the stepper motor

Product Advantages

Wide step resolution options for flexible application needs

High operating temperature range enhances reliability in harsh environments

Versatile voltage ranges support a variety of power supplies and motor types

Compact 44-LCC (J-Lead) package saves space on PCB designs

Key Technical Parameters

Motor Type: Bipolar Stepper

Output Configuration: Half Bridge (4)

Interface: Logic

Current Output: 2.5A

Voltage Supply: 3V ~ 5.5V

Voltage Load: 8V ~ 35V

Operating Temperature: -20°C ~ 150°C (TJ)

Quality and Safety Features

Built using DMOS technology for reliability and performance

Designed with thermal protection mechanisms

Compatibility

Broad compatibility with bipolar stepper motors

Suited for power supplies within the voltage range of 3V to 5.5V logic and 8V to 35V motor operation

Application Areas

General-purpose stepper motor applications requiring precision control, such as 3D printers, CNC machines, and automated equipment

Product Lifecycle

Status: Obsolete

Note: Users should seek replacements or upgrades for new designs as the A3977SED is no longer being produced

Several Key Reasons to Choose This Product

High integration reduces external component count and system complexity

Supports a wide range of power supply and motor operation voltages for versatility

High operating temperature range ensures reliability in challenging environments

Multiple step resolutions offer flexibility in addressing different precision needs

Compact packaging design facilitates easier integration into space-constrained applications