Allegro MicroSystems A4988 Microstepping Motor Driver IC QFN-28

The Allegro A4988 Microstepping Motor Driver IC is a complete, integrated solution for controlling bipolar stepper motors, with a 2 A output current and a 35 V output voltage rating. It includes a built-in translator that simplifies operation by removing the need for complex control sequencing, making it suitable for both prototyping and production applications.

Overview

The driver operates stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, supporting smooth and quiet motion control. With an output drive capacity of up to 35 V and ±2 A, it can handle a range of motor types and sizes. A fixed off-time current regulator supports Slow or Mixed decay modes, with automatic current decay mode detection and selection. Synchronous rectification is incorporated to minimise power dissipation and improve thermal management.

Protection Features

• Under-voltage lockout (UVLO)
• Crossover-current protection
• Thermal shutdown to help prevent damage from overheating
• Short-to-ground and shorted load protection

Logic and Package

The logic supply is compatible with both 3.3 V and 5 V systems, offering flexibility for integration with various microcontrollers and digital logic families. The compact QFN-28 package suits space-constrained designs.

Key Specifications

• IC Type: Microstepping Motor Driver with Translator
• Motor Type: Bipolar Stepper
• Step Modes: Full, Half, Quarter, Eighth, Sixteenth
• Output Current: 2 A
• Output Voltage: 35 V

Choose the Allegro A4988 Microstepping Motor Driver IC when you need a compact, integrated driver for bipolar stepper motors across prototyping and production builds.