DRV8825 Chip

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Contents

Description

The DRV8825 is a 1/32 microstepping stepper motor driver developed and manufactured by Texas Instruments.

DRV8825.jpg

The DRV8825 provides an integrated motor driver solution for printers, scanners, and other automated equipment applications. The device has two H-bridge drivers, and can drive a bipolar stepper motor or two DC motors. The output driver block for each consists of N-channel power MOSFET’s configured as full H-bridges to drive the motor windings. The DRV8825 can supply up to 2.5-A peak or 1.75-A RMS output current (with proper heatsinking at 24 V and 25°C).

A simple step/direction interface allows easy interfacing to controller circuits. Pins allow configuration of the motor in full-step up to 1/32-step modes. Decay mode is programmable. Internal shutdown functions are provided for overcurrent protection, short circuit protection, undervoltage lockout and overtemperature. The DRV8825 is available in a 28-pin HTSSOP package with PowerPAD (Eco-friendly: RoHS & no Sb/Br).

Features

  • PWM Microstepping Motor Driver
  • Built-In Microstepping Indexer
  • Five-Bit Winding Current Control Allows
  • Up to 32 Current Levels
  • Low MOSFET On-Resistance
  • 2.5-A Maximum Drive Current at 24 V, 25°C
  • Built-In 3.3-V Reference Output
  • 8.2-V to 45-V Operating Supply Voltage Range
  • Thermally Enhanced Surface Mount Package

NOTE: When using a 24V supply to power low amperage steppers (< 1.5A), microsteps will be 'cogged over' if the DECAY pin is not set to FAST mode. See the datasheet for details on the DECAY pin.

Applications

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

Datasheet

[1]

External notes/references

See also

A4988 vs DRV8825 Chinese Stepper Driver Boards