Check the listing for details. 5PCS A4988 StepStick Stepper Motor Driver Module Heat sink for 3D Printer Reprap. Condition: New. Listed at 11.99 USD. Product Information 5PCS A4988 StepStick Stepper Motor Driver Module Heat sink for 3D Printer Reprap Click on the Image to Enlarge zoom_in Features: A4988 is a complete microstepping motor driver with built-in translator for easy operation. The product can be full, half, 1/4, 1/8 and 1/16 step mode to operate bipolar stepper motor output drive capacity of up to 35 V and +- 2 A. A4988 includes a fixed off-time current regulator, the regulator can slow or mixed decay mode. The converter is the key to the easy implementation of the A4988. In inputting one pulse on the STEP input drives the motor one microstep. No phase sequence tables, high frequency control lines, or complex interfaces to programming. A4988 interface is very suitable for complex microprocessor is unavailable or is overburdened. 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, undervoltage lockout (UVLO) and crossover current protection. Special power-Sort. A4988 surface mount QFN package (ES), the size of 5 mm X 5 mm nominal overall package height of 0.90 mm, and with exposed pad for enhanced thermal dissipation. The package is Pb (suffixes-T), with 100% matte tin leadframe plating. Product Summary: Low RDS (ON) outputs 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 Note: PCB Colors May vary Specifications: Package Includess: 5 x A4988 Driver Module StepStick Stepper Motor Driver For Reprap 3D Printer 5 x Mini Heat Sink Shipping Orders will be processed within 1 business day. Most items will be shipped out within 1 business day after payment completed and verified. We ship to Paypal's address ONLY.Please make sure your address in Paypal is matched with your shipping address before you pay. Payment Policy We only accept payment through Paypal. Feedback Policy We strive to bring you a pleasant shopping experience with us. If there is any dissatisfaction or any issues with your order, please CONTACT US before leaving negative feedback or open any ebay case or paypal dispute. We always try our best to resolve the issues. Please give us the opportunity to resolve any problem. you may contact us by sending us email or 'Ask a question'. If you are satisfied with our service, please leave us a 5 star positive feedback. Your recognition will make us more confident to develop business and serve you better. Other Policy We answer alll emails within 1 business day. If you have not received our reply, please kindly re-sent your email and we will reply to you as soon as possible. Please DON'T leave negative or neutral feedback if you haven not received item in 30 days. Please contact us first and we will try our best to HELP you to solve the problem. About Us Based in U.S.A., ZEN PC Outlet is a small but motivated company specializing in Computer Hardwares. We believe passionately in great bargains and excellent service, which is why we commit ourselves to giving you the best of both. Please also feel free to contact us about any questions you may have about our products.