1 Features
• Stepper motor driver
– Simple STEP/DIR interface
– Up to 1/8 microstepping indexer
– Programmable mixed decay, blanking, and off
time
• 8V to 35V operating supply voltage range
• Smart tune, slow, fast, and mixed decay options
• High current capacity: 2.5A full-scale, 1.8A RMS
• Low RDS(ON): 310mΩ HS + LS at 24V, 25°C
• Separate logic supply voltage (VCC)
• Pin-to-pin compatible with
– DRV8818: 35V, 370mΩ HS+LS
– DRV8811: 38V, 1000mΩ HS+LS
• Thermally-enhanced surface mount package
• Protection features
– VM Undervoltage Lockout (UVLO)
– Overcurrent Protection (OCP)
– Thermal Shutdown (TSD)
– Indexer zero position output (HOMEn)

2 Applications
• Multifunction Printers
• Textile Machinery, Sewing Machines
• Factory Automation
• Robotics
• In-Vitro Diagnostics
• IP or Pan/Tilt Network Cameras

3 Description
The DRV8818A provides an integrated stepper motor
driver for printers, scanners, and other automated
equipment applications. The device has two H-bridge
drivers and 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/DIR interface allows controller circuits
to be easily interfaced. 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 over
current protection, short circuit protection, undervoltage
lockout and overtemperature.
The DRV8818A is packaged in a 28-pin HTSSOP
package with PowerPAD™.