1 Features

1• 4-Channel Protected Low-Side Driver

– Four NMOS FETs With Overcurrent Protection

– Integrated Inductive Clamp Diodes

• Indexer/Translator for Unipolar Stepper Motors

– Simple Step/Direction Interface

– Three Step Modes (2-Phase Full-Step, 1-2-

Phase Half-Step, 1-Phase Wave Drive)

• DW Package: 1.5-A (Single Channel On) /

800-mA (Four Channels On) Maximum Drive

Current per Channel (at 25°C)

• PWP Package: 2-A (Single Channel On) /

1-A (Four Channels On) Maximum Drive Current

per Channel (at 25°C, With Proper PCB

Heatsinking)

• 8.2-V to 60-V Operating Supply Voltage Range

• Thermally Enhanced Surface Mount Package

2 Applications

• Gaming Machines

• General Unipolar Stepper Motor Drivers

3 Description

The DRV8805 provides an integrated solution for

driving unipolar stepper motors. It includes four lowside

drivers with overcurrent protection and provides

built-in diodes to clamp turnoff transients generated

by the motor windings.

Indexer logic to control a unipolar stepper motor

using a simple step/direction interface is also

integrated. Three stepping modes are supported: 2

phase (full-step), 1-2 phase (half-step), and 1-phase

(wave drive).

In the SOIC (DW) package, the DRV8805 can supply

up to 1.5-A (one channel on) or 800-mA (all channels

on) continuous output current per channel, at 25°C. In

the HTSSOP (PWP) package, it can supply up to 2-A

(one channel on) or 1-A (four channels on)

continuous output current per channel, at 25°C with

proper PCB heatsinking.

Internal shutdown functions are provided for

overcurrent protection, short-circuit protection, under

voltage lockout, and overtemperature, and faults are

indicated by a fault output pin.

The DRV8805 is available in a 20-pin thermallyenhanced

SOIC package and a 16-pin HTSSOP

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