DRV8825PWPRG4.B中文资料德州仪器数据手册PDF规格书

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.