1 Features
• N-channel H-bridge brushed DC motor driver
• 4.5V to 38V operating supply voltage range
• Integrated Voltage and Speed regulation
• Soft-Start and Stop feature for inrush current
protection
• 600mΩ RDS(on) (High-Side + Low-Side)
• High output current capability: 3.7A Peak, 2A RMS
• PWM with I2C control interface
– Configuration and diagnostics on I2C registers
– Multi-follower operation support
– Supports standard and fast I2C mode
• Supports 3.3V, and 5V logic inputs
• Integrated current sensing and current regulation
• Analog current sense output (IPROPI)
• Internal charge pump with 100% duty cycle
• Long battery life with low-power sleep mode
– < 1μA maximum sleep current
• Small package and footprint
– 16-Pin WQFN with PowerPAD™, 3 × 3mm
• Integrated protection features
– VM undervoltage lockout (UVLO)
– Overcurrent protection (OCP)
– Thermal shutdown (TSD)
– Stall detection
– Overvoltage protection (OVP)

2 Applications
• Printers
• Vacuum Robots
• Washers and Dryers
• Coffee Machines
• POS Printers
• Electronic Hospital bed and bed control
• Fitness Machine

3 Description
The DRV8235 is a high-performance integrated Hbridge
motor driver with integrated speed regulation
along with additional integrated features like stall
detection, current sense output, current regulation,
and protection circuitry.
The integrated speed and voltage regulation feature
uses the motor voltage and current information to
regulate motor speed or voltage eliminating the
potential need for external sensors to detect speed.
This reduces board size and design complexity,
and saves on overall system cost. Integrated speed
regulation is used to maintain constant motor speed
over varying input supply voltages which minimizes
current consumption and saves power over time. This
is critical in applications that have different loading
conditions or rely on battery power for operation
where the input voltage is not constant. Soft-start and
stop allows for a controlled turn-on and turn-off time,
reducing large inrush currents to protect the motor
windings from damage, thereby increasing system
reliability and longevity.
An internal current mirror implements current sensing
and regulation. This eliminates the need for a large
power shunt resistor, saving board area and reducing
system cost. The IPROPI current sense output allows
a microcontroller to detect motor stall or changes in
load conditions. Using the VREF pin, this device can
regulate the motor current during startup and highload
events without interaction from a microcontroller.
The device supports sensorless motor stall detection
and reporting to microcontroller.