Description

Overview

A4988 is a complete microstepping motor driver with built-in translator for easy operation. The product is available in full, half , 1/4, 1 / 8 and 1 /16 step mode to operate bipolar stepper motors of an output drive capability of up to 35 V and ± 2 A. A4988 includes a fixed off-time current regulator, the regulator can operate in slow or mixed decay modes. Converter is easy to implement key for A4988. Just enter a pulse in the “step” input drives the motor to produce micro-step. Without the need for phase sequence tables, high frequency control lines, or complex interfaces to program. A4988 interface is ideal for complex microprocessor is unavailable or overloaded applications.

In the micro-step operation, the chopper control A4988 automatically selects within the current decay mode ( slow or mixed ). In mixed decay mode, the device is initially set to a fixed part of the rapid decay in downtime and slow decay for the remainder of downtime. Mixed decay current control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption. Internal synchronous rectification control circuitry provides 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. No need special power sequencing.

A4988 uses surface mount QFN package (ES), size of 5 mm x 5 mm, containing a radiator on the surface layer, with exposed pad for enhanced thermal dissipation. This package is Pb-free ( suffix -T), with 100% matte tin leadframe plating.

General
Brand KEYES
Model N/A
Quantity 4 pieces
Material FR4
Specification
English Manual / Spec Yes
Download Link http://pan.baidu.com/s/1hqIn3Ju
Dimensions & Weight
Dimensions 0.83 in x 0.67 in x 0.63 in (2.1 cm x 1.7 cm x 1.6 cm)
Weight 0.46 oz (13 g)
Packing List
4 x Modules
4 x Heatsinks

All packages from DX.com are sent without DX logo or any information indicating DX.com. Due to package variations from suppliers, the product packaging customers receive may be different from the images displayed.

To enable volume discounts on this site, use coupon code: BULKRATE during checkout. You will see a discount applied at the bottom of the shopping cart. Competitive pricing is available. Contact us for details.

Quantity 3+ units 5+ units 10+ units
Rate US$5.61 shipped US$5.59 shipped US$5.57 shipped

What is Bulk Rate? BulkRate is a semi-wholesale system with items priced separately from retail. When you use bulk rates, a flat $1.70 registered air mail fee will automatically be added to your cart to ensure delivery of package. While BulkRate’s intention is to offer cheaper prices when you buy in bulk, because it is priced separately it on occassions show a higher than retail price. That’s why we ask you to enter BULKRATE as a coupon code to manually activate the rates. You can always opt not to use the bulk rates. If you are looking for wholesale prices please feel free to contact us.

 

Additional information
Weight 0.054 kg
Dimensions 1.5 × 1.0 × 0.5 cm
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