Description
The MCT8316Z provides a single-chip code-free
sensored trapezoidal solution for customers driving
12- to 24-V brushless-DC motors. The MCT8316Z
integrates three 1/2-H bridges with 40-V absolute
maximum capability and a very low RDS(ON) of
95 mOhms (high-side and low-side combined) to
enable high power drive capability. Current is sensed
using an integrated current sensing feature which
eliminates the need for external sense resistors.
Power management features of an adjustable buck
regulator and LDO generate the necessary voltage
rails for the device and can be used to power external
circuits.
MCT8316Z implements sensored trapezoidal control
in a fixed-function state machine, so an external
microcontroller is not required to spin the brushlessDC motor. The 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
register 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 MCT8316Z, intended to protect the
device, motor, and system against fault events.
Refer Application Information for design consideration
and recommendation on device usage.

Features
• Three-phase BLDC motor driver with integrated
Sensored Trapezoidal control
– Hall Sensor based Trapezodial (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 200-kHz PWM frequency
– Active Demagnetization to reduce power losses
• 4.5-V to 35-V operating voltage (40-V abs max)
• High output current capability: 8-A Peak
• Low MOSFET on-state resistance
– 95-mΩ RDS(ON) (HS + LS) at TA = 25°C
• Low power sleep mode
– 1.5-µA at VVM = 24-V, TA = 25°C
• Integrated built-in current sense
– Doesn't require external current sense resistors
• Flexible device configuration options
– MCT8316ZR: 5-MHz 16-bit SPI interface for
device configuration and fault status
– MCT8316ZT: Hardware pin based configuration
• Supports 1.8-V, 3.3-V, and 5-V logic inputs
• Built-in 3.3-V (5%), 30-mA LDO regulator
• Built-in 3.3-V/5-V, 200-mA buck regulator
• Delay compensation reduces duty cycle distortion
• 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 interface

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