MCT8316Z-Q1
SLVSGO3 – DECEMBER 2021
MCT8316Z-Q1 Sensored Trapezoidal Integrated FET BLDC Motor Driver
1 Features
3 Description
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AEC-Q100 qualified for automotive applications
– Temperature grade 1: –40°C ≤ TA ≤ 125°C
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
The MCT8316Z-Q1 provides a single-chip code-
free sensored trapezoidal solution for customers
driving 12-V brushless-DC motors in automotive. The
MCT8316Z-Q1 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-Q1 implements sensored trapezoidal
control in a fixed-function state machine, so an
external microcontroller is not required to spin
the brushless-DC motor. The MCT8316Z-Q1 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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– Doesn't require external current sense resistors
Flexible device configuration options
– MCT8316ZR-Q1: 5-MHz 16-bit SPI interface for
device configuration and fault status
– MCT8316ZT-Q1: Hardware pin based
configuration
There are a large number of protection features
integrated into the MCT8316Z-Q1, intended to protect
the device, motor, and system against fault events.
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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)
Refer Application Information for design consideration
and recommendation on device usage.
Device Information(1)
PART NUMBER
MCT8316ZR-Q1
MCT8316ZT-Q1
PACKAGE
VQFN (40)
VQFN (40)
BODY SIZE (NOM)
7.00 mm × 5.00 mm
7.00 mm × 5.00 mm
– Motor lock protection
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
– Thermal warning and shutdown (OTW/OTSD)
– Fault condition indication pin (nFAULT)
– Optional fault diagnostics over SPI interface
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,
MCT8316Z-Q1
A
B
C
Buck/LDO out
2 Applications
SPEED
PWM input
Sensored
Trap
Control
H
H
DIRECTION
BRAKE
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Brushless-DC (BLDC) Motor Modules
Automotive LIDAR
Small Automotive Fans and Pumps
Headlight Leveling
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 Schematics
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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