1 Features
1• 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
TA = 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)

2 Applications
• Automatic Teller Machines
• Money Handling Machines
• Video Security Cameras
• Printers
• Scanners
• Office Automation Machines
• Gaming Machines
• Factory Automation
• Robotics

3 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.