A3977SLP - Allegro MicroSystems

Manufacturer Part Number

A3977SLP

Manufacturer

allegro-microsystems

Introduction

Integrated stepper motor driver with DMOS microstepping technology.

Product Features and Performance

Integrated DMOS microstepping driver

User-selectable step resolution (full, half, quarter, and eighth steps)

5A output current capability

Wide voltage supply range (3V to 5.5V logic, 8V to 35V motor)

Supports current limiting via an external resistor

Low on-resistance of output transistors

Synchronous rectification for low power dissipation

Internal UVLO and thermal shutdown circuitry

Crossover-current protection

Product Advantages

High integration reduces external components and system complexity

Efficiency through synchronous rectification

Flexible step resolution settings for various applications

Thermal protections enhance reliability

Key Technical Parameters

Step Resolution: 1, 1/2, 1/4, 1/8

Output Current: 2.5A

Voltage Supply: 3V to 5.5V (Logic), 8V to 35V (Motor)

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

Quality and Safety Features

Thermal shutdown

Under-voltage lockout (UVLO)

Crossover-current protection

Built-in synchronous rectification

Compatibility

Logic interface compatible with 3V to 5.5V logic levels

Physical compatibility with 28-TSSOP-EP package

Application Areas

General purpose stepper motor driving applications

Product Lifecycle

Obsolete (Production officially discontinued by allegro-microsystems)

Availability of replacements or upgrades should be checked with the manufacturer

Several Key Reasons to Choose This Product

Simplifies design with integrated control and power stage

High current handling capacity suitable for various motor driving applications

Selectable microstepping resolution for precise motor control

Advanced protection features for increased safety and reliability

Well-suited for general-purpose stepper motor applications due to flexibility and performance features