1 Features

1• Dual PWM Microstepping Motor Driver

– Built-In Microstepping Indexers

– Up to 1.5-A Current Per Winding

– Three-Bit Winding Current Control Allows up to

Eight Current Levels

– Low MOSFET On-Resistance

– Selectable Slow or Mixed Decay Modes

• 8-V to 32-V Operating Supply Voltage Range

• Internal Charge Pump for Gate Drive

• Built-in 3.3-V Reference

• Simple Step/Direction Interface

• Fully Protected Against Undervoltage,

Overtemperature, and Overcurrent

• Thermally-Enhanced Surface Mount Package

2 Applications

• Printers

• Scanners

• Office Automation Machines

• Gaming Machines

• Factory Automation

• Robotics

3 Description

The DRV8821 provides a dual microstepping-capable

stepper motor controller/driver solution for printers, scanners, and other office automation equipment

applications.

Two independent stepper motor driver circuits include

four H-bridge drivers and microstepping-capable

indexer logic. Each of the motor driver blocks employ

N-channel power MOSFETs configured as an Hbridge

to drive the motor windings.

A simple step/direction interface allows easy interfacing to controller circuits. Pins allow

configuration of the motor in full-step, half-step,

quarter-step, or eighth step modes, and the selection

of slow or mixed decay modes.

Internal shutdown functions are provided for over

current protection, short-circuit protection,

undervoltage lockout, and overtemperature.

The DRV8821 is packaged in a 48-pin HTSSOP

package (Eco-friendly : RoHS & no Sb/Br).