Texas Instruments DRV8886/DRV8886AT 2A Stepper Motor Drivers
Texas Instruments DRV8886/DRV8886AT 2A Stepper Motor Drivers are designed for industrial and consumer-end equipment applications. The devices are fully integrated with two N-channel power MOSFET H-bridge drivers, a micro-stepping indexer, and integrated current sensing.
The DRV8886 can drive up to 2A full scale or 1.4A RMS output current (24V and TA = 25°C, dependent on PCB design). The DRV8886 uses an internal current sense architecture to eliminate the need for two external power sense resistors, saving PCB area and system cost. The DRV8886 uses an internal fixed off-time PWM current regulation scheme adjustable between slow and mixed decay options. A simple STEP/DIR interface allows an external controller to manage the direction and step rate of the stepper motor.
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 and slow and mixed decay options. AutoTune adaptive decay technology automatically adjusts for optimal current regulation performance and compensates for motor variation and aging effects. The Texas Instruments DRV8886AT also features dynamic and fixed off-time PWM current regulation.
The device can be configured in different step modes ranging from full-step to 1/16 micro-stepping. A low-power sleep mode is provided for a very low standby quiescent standby current using a dedicated nSLEEP pin.
Features
- PWM micro-stepping stepper motor driver
- Up to 1/16 micro-stepping
- Non-circular and standard ½ step modes
- Integrated current sense functionality
- No sense resistors required
- ±6.25% full-scale current accuracy
- Slow and mixed decay options
- Fixed off-time PWM current regulation
- Simple STEP/DIR interface
- Low-current sleep mode (20μA)
- 8 to 37V operating supply voltage range
- Low RDS(ON): 550mΩ HS + LS at 24V, 25°C
- High current capacity
- 3A peak per bridge
- 2A full-scale per bridge
- 1.4ARMS per bridge
- 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)
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
Videos
Simplified Schematic
Related Product
Texas Instruments DRV8x Integrated Motor Drivers
Integrates gate drive circuitry, sense amps, protection, and FETs.
Related Development Tools
Texas Instruments DRV8886EVM/ATEVM Driver Evaluation Modules
Demonstrates the integrated current sensing capabilities and performance of DRV8886 or DRV8886AT.