DRV8886, 2 A Stepper Motor Driver

By Texas Instruments 102

DRV8886, 2 A Stepper Motor Driver

Texas Instruments' DRV8886 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 DRV8886 is capable of driving up to 2 A full scale or 1.4 A rms output current (24 V 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 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.

Features
  • PWM microstepping stepper motor driver
    • Up to 1/16 microstepping
    • Non-circular and standard 1/2 step modes
  • Integrated current sense functionality
    • No sense resistors required
    • ±6.25% full-scale current accuracy
  • 8 V to 37 V operating supply voltage range
  • Low RDS(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
  • Slow and mixed decay options
  • 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) 
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

नयाँ सामानहरू:

DRV8886PWPDRV8886PWPRDRV8886ATPWPDRV8886ATEVM

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