DRV8825

• PWM Microstepping Stepper Motor Driver
  • Built-In Microstepping Indexer
  • Up to 1/32 Microstepping
• Multiple Decay Modes
  • Mixed Decay
  • Slow Decay
  • Fast Decay
• 8.2-V to 45-V Operating Supply Voltage Range
• 2.5-A Maximum Drive Current at 24 V and
  T_A = 25°C
• Simple STEP/DIR Interface
• Low Current Sleep Mode
• Built-In 3.3-V Reference Output
• Small Package and Footprint
• Protection Features
  • Overcurrent Protection (OCP)
  • Thermal Shutdown (TSD)
  • VM Undervoltage Lockout (UVLO)
  • Fault Condition Indication Pin (nFAULT)
• APPLICATIONS
  • Automatic Teller Machines
  • Money Handling Machines
  • Video Security Cameras
  • Printers
  • Scanners
  • Office Automation Machines
  • Gaming Machines
  • Factory Automation
  • Robotics

The DRV8825 provides an integrated motor driver solution for printers, scanners, and other automated equipment applications. The device has two H-bridge drivers and a microstepping indexer, and is intended to drive a bipolar stepper motor. The output driver block consists of N-channel power MOSFET’s configured as full H-bridges to drive the motor windings. The DRV8825 is capable of driving up to 2.5 A of current from each output (with proper heat sinking, at 24 V and 25°C).

A simple STEP/DIR interface allows easy interfacing to controller circuits. Mode pins allow for configuration of the motor in full-step up to 1/32-step modes. Decay mode is configurable so that slow decay, fast decay, or mixed decay can be used. A low-power sleep mode is provided which shuts down internal circuitry to achieve very low quiescent current draw. This sleep mode can be set using a dedicated nSLEEP pin.

Internal shutdown functions are provided for overcurrent, short circuit, under voltage lockout and over temperature. Fault conditions are indicated via the nFAULT pin.