DRV8825 Stepper Motor Controller IC

Description
 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.

Features
 • PWMMicrostepping Stepper Motor Driver
 – Built-In Microstepping Indexer – Upto1/32 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 TA = 25°C
 • Simple STEP/DIR Interface
 • LowCurrent Sleep Mode
 • Built-In 3.3-V Reference Output
 • Small Package and Footprint
 • Protection Features– Overcurrent Protection (OCP) – Thermal Shutdown (TSD)– VMUndervoltage Lockout (UVLO)  – Fault Condition Indication Pin (nFAULT)

Applications
 • Automatic Teller Machines
 • MoneyHandling Machines
 • Video Security Cameras
 • Printers
 • Scanners
 • Office Automation Machines
 • Gaming Machines
 • Factory Automation
 • Robotics