DRV8711_15 Datasheet, PDF (1/44 Pages) Texas Instruments – DRV8711 Stepper Motor Controller IC

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DRV8711
SLVSC40E – JUNE 2013 – REVISED MARCH 2015
DRV8711 Stepper Motor Controller IC
1 Features
•1 Pulse Width Modulation (PWM) Microstepping
Motor Driver
– Built-In 1/256-Step Microstepping Indexer
– Drives External N-Channel MOSFETs
– Optional STEP/DIR Pins
– Optional PWM Control Interface for DC Motors
• Flexible Decay Modes, Including Automatic Mixed
Decay Mode
• Stall Detection With Optional BEMF Output
• Highly Configurable SPI Serial Interface
• Internal Reference and Torque DAC
• 8-V to 52-V Operating Supply Voltage Range
• Scalable Output Current
• Thermally Enhanced Surface-Mount Package
• 5-V Regulator Capable of 10-mA Load
• Protection and Diagnostic Features
– Overcurrent Protection (OCP)
– Overtemperature Shutdown (OTS)
– Undervoltage Lockout (UVLO)
– Individual Fault Condition Indication Bits
– Fault Condition Indication Pin
2 Applications
• Office Automation Machines
• Factory Automation
• Textile Machines
• Robotics
3 Description
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 and various current decay
modes, including an auto-mixed decay mode. Motor
stall is 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.
The DRV8711 is packaged in a PowerPAD™ 38-pin
HTSSOP package with thermal pad (Eco-friendly:
RoHS and no Sb/Br).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8711
HTSSOP (38)
9.70 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
8.0 V to 52 V
STEP
DIR
SPI
SLEEPn
nFAULT
DRV8711
Stepper
Motor
Pre-Driver
1/256
µstep
Gate Drive
Sense
M
+-
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.