Introduction: Micro-step operation, the chopping control in the A4988 automatically selects the current decay mode (Slow or Mixed). In the mixed decay mode, the device is initially set to fast decay in the part of the fixed off-time, then a slow decay in the rest of the downtime. Mixed-decay current control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption. Internal synchronous rectification control circuitry to improve the pulse-width modulation (PWM) power consumption when operating. Internal circuit protection includes: thermal shutdown with hysteresis, under-voltage lockout (UVLO) and crossover current protection. Special power-Sort. Features: -Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay). -Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection. -Automatic current decay mode detection / selection. -Internal UVLO. -Mixed with slow current decay modes. -Synchronous rectification for low power dissipation. -Crossover-current protection. -Thermal shutdown circuitry. -3.3 and 5 V compatible logic supply. -Thermal shutdown circuitry. -Ground Fault Circuit. -Load short-circuit protection. -Of five optional step mode: full, 1/2, 1/4, 1/8 and 1/16 Package Included:. 5* A4988 StepStick Stepper Motor Diver Module 5* Heat Sink
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