1 Features
• Three-phase BLDC motor driver with integrated
sensored trapezoidal control
– Hall Sensor based trapezoidal (120°)
commutation
– Supports analog or digital hall inputs
– Configurable PWM modulation: synchronous/
asynchronous
– Cycle-by-cycle current limit to limit phase
current
– Supports up to 100-kHz PWM frequency
– Automatic synchronous rectification to reduce
power losses
• 5.0-V to 35-V operating voltage (40-V abs max)
• High output current capability: 1.5-A Peak
• Low MOSFET on-state resistance
– 575-mΩ RDS(ON) (HS + LS) at TA = 25°C
• Low-power sleep mode
– 1.5-μA at VVM = 24-V, TA = 25°C
• Integrated current limiting eliminates external
current sense resistors
• Flexible device configuration options
– MCT8314ZS: 5-MHz 16-bit SPI interface for
device configuration and fault status
– MCT8314ZH: Hardware pin-based
configuration
• Supports 1.8-V, 3.3-V, and 5-V logic inputs
• Built-in 5-V (5%), 30-mA LDO regulator
• A suite of integrated protection features
– Supply undervoltage lockout (UVLO)
– Charge pump undervoltage (CPUV)
– Overcurrent protection (OCP)
– Motor lock protection
– Thermal warning and shutdown (OTW/OTSD)
– Fault condition indication pin (nFAULT)
– Optional fault diagnostics over SPI

2 Applications
• Brushless-DC (BLDC) Motor Modules
• HVAC motors
• Small home appliances
• Office automation machines
• Factory automation and robotics

3 Description
The MCT8314Z provides a single-chip, codefree
sensored trapezoidal commutation device for
customers driving 12- to 24-V brushless-DC motors.
The MCT8314Z integrates three 1/2-H bridges with
40-V absolute maximum capability and a low RDS(ON)
of 575-mΩ (high-side and low-side combined) to
enable high power drive capability. The integrated
current limiting feature limits motor currents during
start-up or high load conditions while eliminating the
need for external sense resistors. An integrated 5-V
LDO generates the necessary voltage rail for the
device and can power external circuits.
MCT8314Z implements sensored trapezoidal control
in a fixed-function state machine, so an external
microcontroller is not required to spin the brushless
DC motor. The MCT8314Z device integrates three
analog Hall comparators for position sensing to
achieve sensored trapezoidal BLDC motor control.
The control scheme is highly configurable through
hardware pins or registers settings ranging from motor
current limiting behavior to fault response. The speed
can be controlled through a PWM input.
There are a large number of protection features
integrated into the MCT8314Z that are designed to
protect the device, motor, and system against fault
events.
Refer Application Information for design consideration
and recommendation on device usage.