35-V, 2.5-A bipolar stepper motor driver with current regulation and 1/8 microstepping

The DRV8818 provides an integrated

stepper motor driver for printers, scanners, and other automated equipment

applications such as textile machines. The device has two H-bridge drivers, as well

as microstepping indexer logic to control a stepper motor.

The output driver block for each

consists of N-channel power MOSFETs configured as full H-bridges to drive the motor

windings.

A simple STEP/DIRECTION interface

allows easy interfacing to controller circuits. The mode pins allow for

configuration of the motor in full-step, half-step, quarter-step, or eighth-step

modes. Decay mode and PWM off time are programmable.

Internal shutdown functions are

provided for overcurrent protection, short-circuit protection, undervoltage lockout

and overtemperature.

The DRV8818 is packaged in a 28-pin

HTSSOP package with PowerPAD™ integrated circuit package.