3D printer A4988 step motor drive Reprap

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A4988

Core chip A4988 Introduction:

A4988 is a DMOS micro -step drive with converter and overcurrent protection. This product can operate the dual -step motor in full, half, 1/4, 1/8, and 1/16 step mode, output drive performanceIt can reach 35 V and ± 2, and A4988 includes a fixed -turn off time current stabilizer, which can work in a slow or mixed attenuation mode.The converter is the key to the easy implementation of A4988.Just enter a pulse in the "step" input, you can drive the motor to generate microscopic steps.There is no need to perform phase sequence tables, high -frequency control rows or complex interface programming.The A4988 interface is very suitable for complex microprocessors that are not available or overloaded.

A4988 has the following points:

1. Step motor for driving 8V ~ 35V 2A;

2. There are only simple steps and direction control interfaces;

3. Five different step modes: full, half, 1/4, 1/8, and 1/16;

4. The adjustable potentiometer can adjust the maximum current output to obtain a higher step rate;

5, automatic current attenuation mode detection/selection;

6. Overheating shutdown circuit, under pressure lock, cross -current protection;

7. Short -circuit protection and loading short -circuit protection