DRV8711_15 Datasheet, PDF (10/44 Pages) Texas Instruments – DRV8711 Stepper Motor Controller IC

DRV8711
SLVSC40E – JUNE 2013 – REVISED MARCH 2015
7 Detailed Description
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7.1 Overview
The DRV8711 device is a stepper motor controller that uses external N-channel MOSFETs to drive a bipolar
stepper motor or two brushed DC motors. A microstepping indexer is integrated, which is capable of step modes
from full step to 1/256-step.
An ultra-smooth motion profile can be achieved using adaptive blanking time, adjustable decay times, and
various current decay modes, including an auto-mixed decay mode. When microstepping, motor stall can be
reported with an optional back-EMF output.
A simple step/direction or PWM interface allows easy interfacing to controller circuits. A SPI serial interface is
used to program the device operation. Output current (torque), step mode, decay mode, and stall detection
functions are all programmable through a SPI serial interface.
Internal shutdown functions are provided for overcurrent protection, short-circuit protection, undervoltage lockout,
and overtemperature. Fault conditions are indicated through a FAULTn pin, and each fault condition is reported
through a dedicated bit through SPI.
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