Brush DC Drivers
DMOS Microstepping Driver with 1/16-Step Resolution, Integrated Translator, and Synchronous Rectification
A3984
The A3984 offers precise and efficient microstepping control of bipolar stepper motors, featuring 1/16-step resolution, an integrated translator for simplified control, and synchronous rectification for reduced power dissipation.
Product Details
Product Details
Top Features
-
Small 24-pin eTSSOP package (7.8 x 4.4 x 1.2 mm)
Less than one-third the PC board space of our closest competitor. In many applications PC board space is tight, so smaller is better. Thermal resistance: RθJA 28C/W. -
STEP and DIRECTION interface
Two control lines vs. eight, 10 or more control lines for competing devices. Additional I/O lines can add to system cost. Commutation tables are not required. Customer can switch to other Allegro Step/Direction interface devices without changing software. Common interface for all applications. -
Synchronous rectification
Reduces power dissipation and can eliminate need for external Schottky diodes. Typically a 20% power savings. -
Low Ron DMOS outputs
Reduces power dissipation. Can achieve higher average output current due to the lower die temperature rise. -
Automatic slow, fast and mixed decay
Improved microstepping accuracy and reduced audible noise, an Allegro-patented feature. -
2 A peak output current
The 2 A rating is 0.5 A above most competitors. Additional safety margin for high-reliability designs. -
Less than 10 mA sleep mode current
New designs are requiring low current draw when disabled. Most bipolar competitors to the A3983/84 have 10 to 1000 times the current draw when disabled. -
Competitive price
The A3983/84 can be priced to compete with any stepper motor driver with similar output ratings.
Target Application
