MCT8316Z
SLVSF18B – MARCH 2021 – REVISED NOVEMBER 2021
MCT8316Z Sensored Trapezoidal Integrated FET BLDC Motor Driver
1 Features
3 Description
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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
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.
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MCT8316Z implements sensored trapezoidal control
in a fixed-function state machine, so an external
microcontroller is not required to spin the brushless-
DC 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.
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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.
– Supply undervoltage lockout (UVLO)
– Charge pump undervoltage (CPUV)
– Overcurrent protection (OCP)
Device Information(1)
PART NUMBER
MCT8316ZR
PACKAGE
VQFN (40)
VQFN (40)
BODY SIZE (NOM)
7.00 mm × 5.00 mm
7.00 mm × 5.00 mm
– Motor lock protection
– Thermal warning and shutdown (OTW/OTSD)
– Fault condition indication pin (nFAULT)
– Optional fault diagnostics over SPI interface
MCT8316ZT
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
2 Applications
4.5V to 35V (40V abs max)
Buck/LDO out
3.3 or 5.0 V, up to
200mA
8-A peak output current,
typically 12- to 24-V,
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Brushless-DC (BLDC) Motor Modules
Small home appliances
HVAC motors
Office automation machines
Factory automation and robotics
MCT8316Z
A
B
C
Buck/LDO out
SPEED
PWM input
Sensored
Trap
Control
H
H
DIRECTION
BRAKE
H
FGOUT
Speed feecback
nFAULT
Buck/LDO Regulator
SPI
Only on SPI
variant
Hall inputs support:
Differenꢀal Hall elements
Integrated Current Sensing
Differenꢀal analog output Hall-effect sensors
Digital output Hall-effect sensors
Single-ended analog output Hall-effect sensors
Simplified Schematic
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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