Features:
1.The A4988 is a complete micro step motor driver with built-in converter for easy operation,with heat sink.

2.The product can operate bipolar stepping motor in full, half, 1/4, 1/8 and 1/16 step modes, and the output drive performance can reach 35V and 2A.

3.A4988 includes a fixed off time current regulator, which can operate in slow or mixed attenuation mode.

4.The converter is the key to the easy implementation of the A4988. As long as a pulse is input into the Step input, the motor can be driven to generate micro steps. No phase sequence table, high frequency control line or complex interface programming is required.

5.The A4988 interface is ideal for applications where complex microprocessors are unavailable or overloaded.

6.The chopper control in the A4988 automatically selects the current decay mode (slow or mixed) during micro step operation.

7.Low RDS(on) output.

8.Automatic current decay mode detection / selection.

9.Support 3.3V and 5V logic power supply.

10.Cross current protection, grounding short circuit protection, load short circuit protection.Overheat shutdown circuit.

11.Mixed with slow current decay mode.

12.Synchronous rectifier for low power dissipation.

13.Internal under voltage lock out (UVLO).

Package Include:
3 x A4988 Stepper Motor Driver
3 x heat sink