1 Features
• Integrates four H-bridges
• Can drive different configurations -
– Two stepper motors
– Four brushed-DC motors
– Three brushed-DC motors
– One stepper and two brushed-DC motors
– One stepper and one brushed-DC motor
• Footprint and software compatible with similar
drivers from other vendors
• 4.5-V to 38-V Operating supply voltage range
• Low RDS(ON): 900 mΩ HS + LS at 24 V, 25°C
• 1.5-A full-scale current Per Bridge
• Industry standard PHASE/Ixx Interface
• Synchronous rectification
• Full, 1/2 and 1/4 step operation for stepper motors
• Forward, reverse and coast modes for DC motors
• Smart tune decay for smooth and quiet operation
• Supports 3.3 V and 5 V logic inputs
• Protection features
– VM undervoltage lockout (UVLO)
– Charge pump undervoltage (CPUV)
– Overcurrent protection (OCP)
– Thermal shutdown (OTSD)

2 Applications
• IP Network Camera
• Brushed DC Motors
• Printers and scanners
• Medical Applications
• ATMs, currency counters, and EPOS
• Office and home automation
• Major and small home appliances

3 Description
The DRV8845 is a quad full-bridge driver for a wide
variety of industrial applications. The device can be
used for driving up to two stepper motors or up to
four brushed-DC motors. Each full-bridge output is
rated up to 1.5 A and 38 V. The DRV8845 includes
pulse width modulation (PWM) current regulators,
along with 2- bit nonlinear DACs (digital-to-analog
converters) that allow stepper motors to be controlled
in full, half, and quarter steps; and DC motors in
forward, reverse, and coast modes.
The PWM current regulator uses the smart tune
decay mode for motor audible noise and vibration
reduction, increased accuracy, and reduced power
dissipation. Internal synchronous rectification control
circuitry is provided to improve power dissipation
during PWM operation.
Protection features include thermal shutdown with
hysteresis (OTSD), undervoltage lockout (UVLO)
and overcurrent protection (OCP). Special power up
sequencing is not required.
The DRV8845 is supplied in a 6 mm x 6 mm, 36 pin
QFN package with exposed pad for enhanced thermal
performance.