The A4988 is a complete microstepping motor driver with built-in converter, easy to operate. The products can be in full, half, 1/4, 1/8 and 1/16 step mode of operation bipolar stepper motor, output drive performance up to 35 V and ± 2 A. A4988 includes a fixed off time current regulator, the regulator can be in slow or mixed decay mode. The converter is the key to the easy implementation of the A4988. As long as the input of a pulse in the "step" in the input can be driven motor, microstep. There are no phase sequence s, high frequency control interface programming or complex. The application of A4988 interface is very sui for complex microprocessor is not available or overload.
- Low RDS (open) output
- Automatic current decay mode detection / choice
- Mixed with slow current decay mode
- The low power dissipation of synonous rectifier
- Internal UVLO
- Crossover current protection
- 3.3 and 5 V compatible logic supply
- Thermal shutdown circuit
- G fault protection
- Loading and short circuit protection
- The optional five step mode: full, 1/2, 1/4, 1/8 and 1/16