A4988 Stepper Motor Driver Module

A4988 Stepper Motor Driver with Heat Sink

The A4988 Stepper Motor Driver is a reliable micro-stepping driver module designed to control bipolar stepper motors with ease. Operating between 8V–35V, it can deliver up to 1A per coil without cooling and up to 2A with proper heat dissipation, making it a versatile choice for a wide range of motor control projects.

This module simplifies stepper motor operation with its built-in translator and current regulator, eliminating the need for complex phase sequencing or programming. With support for multiple step resolutions — full, 1/2, 1/4, 1/8, and 1/16 step modes — it ensures smooth and precise motion control, while reducing power consumption and motor noise.

Equipped with protection features like under-voltage lockout, thermal shutdown, crossover current protection, and short-circuit protection, the A4988 is both safe and durable. It also comes with an included heat sink to help maintain stable performance under higher loads.

This driver is available in normal quality and good quality variants, the latter offering improved PCB layering and gold-plated pins for enhanced durability and connectivity.

Key Features:

• Wide operating voltage: 8V – 35V
• Current handling: 1A (no heatsink), up to 2A (with heatsink)
• Multiple micro-stepping modes: Full, 1/2, 1/4, 1/8, 1/16
• Built-in current decay control for quiet and accurate performance
• Internal protections: UVLO, thermal shutdown, short-circuit & crossover protection
• Compact QFN package with exposed thermal pad for efficient heat dissipation

Specifications

• Model: A4988 Series
• Input Voltage: 8–35V DC
• Logic Voltage: 3–5.5V
• Operating Current: 1A (no heatsink), 2A (with cooling)
• Dimensions: 5 × 5 × 4 cm
• Weight: 0.08 kg

Pinouts

Package Includes:

• 1 × A4988 Stepper Motor Driver (Normal Quality)
• 1 × Heat Sink