Micro-step DMOS driver with translator
The A3979 is a complete microstep motor driver with
Built-in translator, designed as a pin-compatible replacement for the
The successful A3977 with improved microstep precision (1/16 step)
Precision. It is designed for the operation of bipolar stepper motors in
In full, half, quarter and sixteenth steps, with one output voltage
Output voltage of up to 35 V and ±2.5 A. The A3979 contains one
Current controller with a fixed cut-off time that can operate in the following operating modes
Slow, fast, or mixed decay mode. This power drop control
Reduces audible motor noise, increases step accuracy
Step accuracy and reduced power dissipation.
The translator is the key to making the easy to implement
A3979. It enables the simple input of a pulse at STEP
PIN to control the motor a microstep that is either a full step
Can be full step, half step, quarter step, or sixteenth step, depending on the setting
MS1 and MS2 logic inputs. There are no phase sequence tables,
To program high-frequency control lines or complex interfaces.
The A3979 interface is ideal for applications where a
Microprocessor is unavailable or overloaded.
Key features
