5PCS/PACK A4988 Stepper Driver Module with Heat Sink for 3d Printer Reprap

DMOS microstepping driver with built-in converter and overcurrent protection. Runs bipolar stepper motors.

Step Modes

Full, 1/2, 1/4, 1/8, 1/16;

Electrical

Supply voltage: 8V–35V

Output current: up to 2A

Logic voltage: 3.3V or 5V compatible;

Control

Step and direction interface

Pulse in = one microstep

No phase table or complex programming required;

Current Adjustment

Onboard potentiometer sets max output current

Formula: I = Vref × 0.8 (measure Vref between pot pin and GND)

Clockwise: increases current

Counterclockwise: decreases current;

Decay Modes

Fixed off-time current regulator with slow or mixed decay, auto-selected;

Protection:

Overtemperature shutdown

Undervoltage lockout

Cross-current protection

Short-to-ground protection

Short-to-load protection;

Package includes:

5 x A4988 stepper drivers

Resources