5x A4988 Stepstick Stepper Motor Driver Module + Heat Sink For 3d Printer Reprap

US $12.98

??, ???, China
Jan 29th

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A4988 StepStick Stepper Motor Driver Module + Heat Sink for 3D Printer Reprap 100% brand new Feature: 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<,A0~A5/li> 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 Include: 5 x StepStick Stepper motor driver module 5x Mini Heat Sink Payment We accept PayPal only. We ship within 1-2 business days of receiving payment. Serious bidders only, please. Orders will be cancelled and an unpaid item dispute filed if payment is not received within 10 days of purchase. Shipping Items shipped to United States are via USPS (ePacket shipping). Items shipped to other countries, we offer two shipping methods for you to choose. One is ordinary Air Mail without tracking number (Economy Int'l Shipping), And the other is Registered Air Mail with tracking number (Standard Int'l Shipping). We highly suggest you choose registered mail ,because it can be tracked. Ship to address provided by ebay if no special notes from buyer . Delivery Time: Normally, It Takes About 10-30 Business Days to Arrival for most Countries. *5-14 days to USA. *10-25 days to Australia / Canada. *14-30 days to major cities in Europe . *4 - 8 weeks to Italy , Brazil ,Russia. Please contact us if you have not receive the item over 30 business days. However, it may delay due to industrial strike action, severe weather, custom reasons or peak seasons, such as Christmas/New Year Holidays. Returns We stand behind every product we sell. If you're not pleased with your purchase, we'll be happy to make an exchange or refund within 30 days of your purchase. For any exchange or refund, we need the original receipt or a record of the purchase in our system, and the product must be in its original condition, including the box, UPC bar code, packaging, and all accessories. Contact Us We always trying to provide the best service and reliable products for every customer. We do appreciate your positive feedback with 5stars rating comments! Our system will leave feedback to you automatically after we receive your payment. We know that sometimes when order problems arise, it can be very frustrating, we are there with you every step of the way to make your experience more pleasant. Please feel free to contact us for solution, when you have any questions. Please contact us via ebay message. Our work day is Monday to Friday , we will assist you in any way possible and aim to answer all emails within 24 hours.