A4988 Stepper Motor Drivers with Heatsink For SKR V1.3 1.4 GTR V1.0 MKS GEN V1.4 board

A4988 Stepper Motor Drivers 3D Printers Parts Module with Heatsink For SKR V1.3 1.4 GTR V1.0 MKS GEN V1.4 board

A4988 is a complete micro-stepping motor driver with a built-in translator for easy operation. This product is available in full, half, 1/4, 1/8, and 1/16 step modes operates bipolar stepper motors, output drive capacity of up to 35 V and ± 2 A. A4988 includes a fixed off-time current regulator, the regulator in slow or mixed decay modes. A4988 converter is the key to easy implementation. As long as the "step" input inputting one pulse drives the motor one micro step. There are no phase sequence tables, high-frequency control lines, or complex interfaces to program. A4988 interface is very suitable for a complex microprocessor that is unavailable or is overburdened.

In the micro-step operation, A4988 chopping control inside automatically selects the current decay mode (Slow or Mixed). In mixed decay mode, the device is initially set to a fixed downtime in some fast decay, then the rest of the slow decay downtime. Mixed decay current control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption. Internal synchronous rectification control circuitry is provided to improve the pulse-width modulation (PWM) operation power consumption. Internal circuit protection includes thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover-current protection. Special power sequencing.

A4988 surface mount QFN package (ES), a size of 5 mm × 5 mm, nominal overall package height of 0.90 mm, with an exposed pad for enhanced thermal dissipation. This package is Pb (suffix-T), with 100% matte tin leadframe plating.

Features and Benefits:

· Low RDS (On) Output

· Automatic current decay mode detection/selection

· Mix with slow current decay modes

· Synchronous rectification for low-power dissipation

· Internal UVLO

· Cross-current protection

· 3.3 and 5 V compatible logic supply

· Thermal shutdown circuitry

· Ground fault protection

· Load short-circuit protection

· Optional step five modes: full, 1/2, 1/4, 1/8, and 1/16

Package Included:

5 X A4988 Stepper Driver with heat sink

Dimension: 20*15*10mm（0.79"*0.59”*0.39"）

Please allow a 1-3mm error due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.