The A4988 is a microstepping driver IC designed for controlling bipolar stepper motors, providing precise current control and smooth motion. This IC is suitable for a variety of applications where stepper motors are used. The A4988 comes in a compact QFN-28 SMD package, making it ideal for integration into space-constrained designs.

Specifications:

• IC Type: Stepper Motor Driver
• Package Type: QFN-28 SMD
• Package Size: 28 Pins
• Operating Voltage: 8 V to 35 V
• Output Current: Up to 2 A per coil
• Microstepping: Full, 1/2, 1/4, 1/8, and 1/16 steps
• Logic Input Voltage: 3.3 V to 5 V
• Operating Temperature Range: -20°C to +85°C
• Brand: Allegro

Pin Configuration:

1. VDD: Logic power supply
2. GND: Ground
3. DIR: Direction input
4. STEP: Step input
5. MS1: Microstep select 1
6. MS2: Microstep select 2
7. MS3: Microstep select 3
8. RST: Reset input
9. SLP: Sleep mode input
10. VREF: Reference voltage input
11. OUT1A: Output 1A
12. OUT1B: Output 1B
13. GND: Ground
14. VBB: Motor power supply
15. VBB: Motor power supply
16. OUT2B: Output 2B
17. OUT2A: Output 2A
18. GND: Ground
19. NC: No Connection
20. NC: No Connection
21. NC: No Connection
22. NC: No Connection
23. NC: No Connection
24. NC: No Connection
25. NC: No Connection
26. NC: No Connection
27. NC: No Connection
28. NC: No Connection

Features:

• Microstepping control: Full, 1/2, 1/4, 1/8, and 1/16 step modes
• Adjustable current control for precise motion
• Built-in overcurrent and thermal protection
• Automatic current decay mode detection/selection
• Compact QFN-28 package for space-constrained applications

Applications:

• 3D printers
• CNC machines
• Robotics
• Automated machinery
• Precision motion control systems

Package Includes:

1 x A4988 Stepper Motor Driver IC (QFN-28 SMD Package)

Note: Product images are for illustrative purposes only and may differ from the actual product.