A4988 Micro stepping Bipolar Stepper Motor Driver IC

A4988 Micro stepping Bipolar Stepper Motor Driver IC

The A4988 is a complete micro stepping motor driver with built-in translator for easy operation. It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2 A. The A4988 includes a fixed off-time current regulator which has the ability to operate in slow or mixed decay modes. The translator is the key to the easy implementation of micro stepping; by simply inputting a step pulse, the driver controls the motor based on the selected step resolution.

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• Micro stepping capability: The A4988 supports full, half, quarter, eighth, and sixteenth micro stepping modes for finer motor control and smoother operation.
  

• Built-in translator: Simplifies control over stepper motors by converting step and direction signals into corresponding motor movements.
  

• Adjustable current control: Allows control over the maximum output current with a potentiometer, protecting the motor from overcurrent.
  

• Over-temperature shutdown: Protects the driver from damage due to excessive temperature rise.
  

• Under-voltage lockout (UVLO): Prevents the driver from operating below a certain voltage level to ensure reliable performance.
  

• Crossover-current protection: Prevents the shorting of outputs when switching phases, ensuring safe operation.
  

Specifications of A4988 Micro stepping Bipolar Stepper Motor Driver IC

• Motor Voltage (VMOT): 8V to 35V.

• Logic Voltage (VDD): 3.3V to 5V.

• Maximum Output Current: Up to 2A per coil (with proper cooling).

• Micro stepping Modes: Full-step, half-step, quarter-step, eighth-step, sixteenth-step.

• Step Resolution Control: Configurable using three input pins (MS1, MS2, MS3).

• Current Sensing: Via two resistors, one for each motor coil.

Package Includes

• 1 x A4988 Micro stepping Bipolar Stepper Motor Driver IC