A4988 Stepper Motor Driver Module with Heat Sink (5-Pack Kit)

Product Overview

The A4988 is a microstepping motor driver with a built-in translator for simplified operation. This module is designed to drive bipolar stepper motors in full, half, quarter, eighth, and sixteenth-step modes. It is commonly utilized in 3D printers, CNC machines, and other automated motion control systems requiring precise motor positioning.

Key Technical Features

• Integrated translator for simple step and direction control.
• Five selectable step resolutions: full, 1/2, 1/4, 1/8, and 1/16.
• Adjustable current control via onboard potentiometer to set maximum current output.
• Intelligent chopping control that automatically selects the correct current decay mode.
• Thermal shutdown circuitry, under-voltage lockout, and crossover-current protection.

Technical Specifications

ParameterSpecification Controller ICA4988 Operating Voltage8V to 35V Logic Voltage3.3V to 5V Max Current1A per phase (without cooling), up to 2A with adequate heat sinking Microstep Resolutions1, 1/2, 1/4, 1/8, 1/16 Dimensions20mm x 15mm Kit Package Contents

• 5x A4988 Stepper Motor Driver Modules (Red PCB)
• 5x Aluminum Heat Sinks with adhesive backing

Pinout & Interface Usage Notes

The module interfaces via standard STEP and DIR pins for motion control. The MS1, MS2, and MS3 pins are used to configure the microstepping resolution. The ENABLE pin allows for disabling the driver outputs. Users must adjust the onboard potentiometer to limit the current supplied to the motor coils to prevent overheating. It is recommended to monitor the Vref voltage during adjustment to ensure the current does not exceed the motor's rated specifications. Always ensure power is disconnected before adjusting the potentiometer or connecting/disconnecting motors to prevent damage to the driver IC.