FLSUN® 2PCS A4988 Reprap Stepper Motor Driver Module With Heatsink For 3D Printer

Description A4988 is a complete microstepping motor driver with built in translator for easy operation This product is available in full half 1 4 1 8 and 1 16 step modes operate 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 the easy implementation As long as the step input inputting one pulse drives the motor one microstep 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 1 Simple step and direction control interface2 Short to ground and shorted load protection3 Five