A4988 Stepper Motor Driver

This A4988 stepper driver features adjustable current limiting, overcurrent and overtemperature protection, and six microstep resolutions (down to 1/32-step). It operates from 8.2 – 45 V and can deliver up to approximately 1.5 A per phase without a heat sink or forced air flow (rated for up to 2.2 A per coil with sufficient additional cooling).

Features:

• Simple step and direction control interface.
• Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step.
• Can interface directly with 3.3 V and 5 V systems.
• Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout.
• Short-to-ground and shorted-load protection.
• 4-layer, 2 oz copper PCB for improved heat dissipation.
• Exposed solderable ground pad below the driver IC on the bottom of the PCB.
• Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates.
• Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay).
• 45 V maximum supply voltage.
• Built-in regulator (no external logic voltage supply needed).