A4988 Stepper Motor Driver Control Expansion Board With Heat Sink Stepper Motor Driver Control Expansion Shield for 3D Printer

Features:

1.High-Quality A4988 Chip: This stepper motor driver uses high-quality A4988 chips, which are fully featured stepper motor drivers that can operate in full, half, 1/4, 1/8, and 1/16-step modes for bipolar stepper motors with output driving performance of up to 35V and ±2A.
2.Automatic Current Decay Mode Selection: The A4988 chip's chopper control automatically selects the slow or mixed decay modes when running in full, half, 1/4, and 1/8-step modes. Mixed decay current control can reduce audible motor noise, increase precision, and reduce power consumption.
3.Enhanced Thermal Performance: The A4988 chip is packaged in a surface-mount QFN (ES) package with an exposed pad for enhanced thermal performance. The package is lead-free (suffix T) with 100% matte-tin-plated lead frames.
4.Multiple Step Modes: This stepper motor driver features five optional step modes: full, 1/2, 1/4, 1/8, and 1/16, providing customers with flexibility and convenience in usage.
5.Upgraded Manufacturing Process: The stepper motor driver comes with upgraded manufacturing processes, including PCB copper thickness upgrade to 70UM for better heat dissipation and SMT placement manufacturing processes for higher yield rates and stability.

 

Specification:
Origin: Mainland China
Type: Module
Condition: New
Micro-step motor driver A4988 with heat sink
Product parameters:
1.A4988 is a complete micro-step motor driver with built-in converter for easy operation. The product can operate bipolar stepper motors in full, half, 1/4, 1/8 and 1/16 stepper modes with output drive performance up to 35 V and ±2A. The A4988 includes a fixed off-time current regulator that can operate in slow or mixed decay modes. The converter is the key to the A4988's ease of implementation. As long as the "step" input in a pulse, you can drive the motor to generate microsteps. The A4988 interface is ideal for complex microprocessor unavailability or overload applications.
The chopper control within the A4988 automatically selects the current decay mode (slow or mixed) during microstep operation. In the mixed decay mode, the device is initially set to decay quickly during part of the fixed downtime, and then decay slowly for the remainder of the downtime. The mixed decay current control scheme reduces audible motor noise, increases stepping accuracy, and reduces power consumption. Internal synchronous rectification control circuitry is provided to improve power consumption during pulse width modulation (PWM) operation. Internal circuit protection includes: thermal shutdown with hysteresis, undervoltage lockout (UVVILo), and cross-current protection. No special power-on sequencing is required.
The A4988 is available in a surface mount QFN package (ES) with an exposed heat sink to enhance heat dissipation. The package is a lead-free package (suffix T) with a 100% matte tin plated pin frame.
4. Product size: 20*15*10mm
Product features and benefits:
1. Low RDS output
2. Current decay mode detection/selection
3. Mixed with slow current decay mode
4. Synchronous rectification for low power dissipation
5. Internal UVLO
6. Cross-current protection
7.3.3 and 5V compatible logic power supply
8. Thermal shutdown circuit
9. Ground short circuit protection
10. Load short circuit protection
11. Five optional stepping modes: full, 1/2, 14, 1/8 and 1/16
12. Using the latest batch number of chips, more compatible, better conductivity
13. Voltage regulator, used to adjust the reference voltage of A4988
Remark.
REPRAP single printhead printer set requires 4 A4988 modules
REPRAP dual printhead printer set requires 5 A4988 modules

Note:
Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
Please allow 1-2cm measuring deviation due to manual measurement.

1Pc *Stepper Motor Driver Module