A4988 is an A4988 microprocessor bipolar stepper motor driver board and can also be used to replace the A4983 stepper motor driver bracket. The A4988 includes an adjustable current limitation, overcurrent protection and five different microstep resolutions. Operating voltage from 8 - 35 V to 2 A per coil. This unit is delivered pre-welded with the header pins. Features: • Low RDS (ON) output • Automatic detection / selection of the current decay mode • Mixed with slow current decay modes • synchronous rectification for low power dissipation • Internal UVLO • Protection against cross currents • Logic supply 3.3 and 5 V compatible • thermal stop circuit • Protection against earth faults • Protection against load short circuits • Five selectable step modes: full, 1/2, 1/4, 1/8 and 1 / 16
