DRV8818 Bipolar Stepper Motor Driver

By Texas Instruments 182

DRV8818 Bipolar Stepper Motor Driver

Texas Instruments' DRV8818 provides an integrated stepper motor driver solution for printers, scanners, and other automated equipment applications. It has two H-bridge drivers and a microstepping indexer logic to control a stepper motor. The output driver block for each consists of N-channel power MOSFETs configured as full H-bridges to drive the motor windings. A simple step/direction interface allows easy interfacing to controller circuits. Pins allow configuration of the motor in full-step, half-step, quarter-step, or eighth-step modes. Decay mode and PWM off time are programmable. Internal shutdown functions are provided for over current protection, short circuit protection, under-voltage lockout and overtemperature.

  • Pulse Width Modulation (PWM) microstepping motor driver
    • Built-in microstepping indexer
    • Up to 2.5 A current per winding
    • Microstepping indexer provides up to 1/8-step operation
    • Low 0.37 Ω (HS + LS) MOSFET on-resistance (at 25°)
    • Programmable mixed decay, blanking, and off time
  • Pin-compatible upgrade to DRV8811 with lower RDS(ON)
  • Thermally enhanced surface mount package
  • Printers
  • Textile machinery
  • Positioning
  • Tracking
  • Factory automation
  • Robotics

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