DRV8886AT Datasheet, PDF (1/40 Pages) Texas Instruments – 2-A Stepper Motor Driver With Integrated Current Sense and AutoTune Technology

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DRV8886AT
SLVSDO1 – JANUARY 2017
DRV8886AT 2-A Stepper Motor Driver With Integrated Current Sense
and AutoTune™ Technology
1 Features
•1 PWM Microstepping Stepper Motor Driver
– Up to 1/16 Microstepping
– Non-Circular and Standard ½ Step Modes
• Integrated Current Sense Functionality
– No Sense Resistors Required
– ±6.25% Full-Scale Current Accuracy
• AutoTune™ Adaptive Decay Technology,
Slow, and Mixed Decay Options
• 8 to 37-V Operating Supply Voltage Range
• Low R_DS(ON): 550 mΩ HS + LS at 24 V, 25°C
• High Current Capacity
– 3-A Peak Per Bridge
– 2-A Full-Scale Per Bridge
– 1.4-A rms Per Bridge
• Dynamic and Fixed Off-Time PWM Current
Regulation
• Simple STEP/DIR Interface
• Low-Current Sleep Mode (20 μA)
• Small Package and Footprint
– 24 HTSSOP PowerPAD™ Package
• Protection Features
– VM Undervoltage Lockout (UVLO)
– Charge Pump Undervoltage (CPUV)
– Overcurrent Protection (OCP)
– Thermal Shutdown (TSD)
– Fault Condition Indication Pin (nFAULT)
2 Applications
• Bipolar Stepper Motors
• Multi-Function Printers and Scanners
• Laser Beam Printers
• 3D Printers
• Automatic Teller and Money Handling Machines
• Video Security Cameras
• Office Automation Machines
• Factory Automation and Robotics
3 Description
The DRV8886AT is a stepper motor driver for
industrial and consumer end equipment applications.
The device is fully integrated with two N-channel
power MOSFET H-bridge drivers, a microstepping
indexer, and integrated current sensing. The
DRV8886AT is capable of driving up to 2-A full scale
or 1.4-A rms output current (24-V and T_A = 25°C,
dependent on PCB design).
The DRV8886AT uses an internal current sense
architecture to eliminate the need for two external
power sense resistors saving PCB area and system
cost. The DRV8886AT uses an internal PWM current
regulation scheme adjustable between AutoTune
adaptive decay technology, slow, and mixed decay
options. AutoTune adaptive decay technology
automatically adjusts for optimal current regulation
performance and compensates for motor variation
and aging effects.
A simple STEP/DIR interface allows an external
controller to manage the direction and step rate of the
stepper motor. The device can be configured in
different step modes ranging from full-step to 1/16
microstepping. A low-power sleep mode is provided
for very low standby quiescent standby current using
a dedicated nSLEEP pin.
Device protection features are provided for supply
undervoltage, charge pump faults, overcurrent, short
circuits, and overtemperature. Fault conditions are
indicated by the nFAULT pin.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8886AT
HTSSOP (24)
7.80 × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
8 to 37 V
STEP
DRV8886AT
DIR
Stepper Motor
2A
Driver
Step Size
Decay Mode
AutoTune
nFAULT
Current Sense
2A
1/16 µstep
M
+±
Copyright © 2017, Texas Instruments Incorporated
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.