Description:

Special Note: Based on the strong response from users, Rs has been changed from 0.2 ohm to 0.1 ohm so that the maximum drive current can support 2A.

Features Advantages:
1. quality upgrade without price increase, large quantities from the best, welcome to inquire.

2. the latest batch number chip.

3. PCB copper cladding process upgraded to 2oz (copper skin thickness of 70um, ordinary is 35um), higher copper content, heat dissipation performance is certainly better.

4. row of pins have been welded, gold-plated row of pins, excellent quality.

5. different batches of PCB color shades slightly different, the same excellent quality!

Parameters:

Size: 1.5mmX2mm (for RAMPS, ultimaker or other compatible boards);

Driveable current: 2A (best to install a heat sink)

Subdivision: 1, 1/2, 1/4, 1/8, 1/16

Manufacturing process: SMT SMT machine manufacturing, non-manual welding, higher yield rate, more stable performance

Suitable objects:

1.Need to drive the stepper motor occasions.

2. Is to build 3d printer, cnc, engraving machine and other necessary modules.

3. Support for 3d printer Prusa Mendel, ultimaker, printbot, makerbot and so on.
     
Core chip A4988 introduction:

The A4988 is a DMOS microstepping driver with converter and overcurrent protection that operates bipolar stepper motors in full, half, 1/4, 1/8, and 1/16 stepping modes, with output drive performance up to 35 V and ±2. The A4988 includes a fixed off-time current regulator that operates in slow or mixed decay modes. The converter is the key to the A4988's ease of implementation. The motor can be driven to produce microsteps with a single pulse on the "step" input. There is no need for phase sequence tables, high frequency control lines, or complex interface programming, and the A4988 interface is ideal for complex applications where the microprocessor is not available or is overloaded.

A4988 features the following points:

1. suitable for driving stepper motors up to 8V~35V 2A;

2. Only simple stepping and direction control interface;

3. five different stepping modes: full, half, 1/4, 1/8 and 1/16;

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

5. Automatic current decay mode detection/selection;

6. overheat shutdown circuit, undervoltage lockout, cross-current protection;

7. ground short circuit protection and loading short circuit protection

 

Package Inckuded:

1x A4988 Stepper motor driver module