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MCT8316Z-Q1 Sensored Trapezoidal Integrated FET BLDC Motor Driver

1 Features

•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 R

DS(ON)

(HS + LS) at T

A

= 25°C

•Low power sleep mode

–1.5-µA at V

VM

= 24-V, T

A

= 25°C

•Integrated built-in current sense

–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

•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

2 Applications

•Brushless-DC (BLDC) Motor Modules

•Automotive LIDAR

•Small Automotive Fans and Pumps

•Headlight Leveling

3 Description

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.

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.

There are a large number of protection features

integrated into the MCT8316Z-Q1, intended to protect

the device, motor, and system against fault events.

Refer Application Information for design consideration

and recommendation on device usage.

Device Information

(1)

PART NUMBERPACKAGEBODY SIZE (NOM)

MCT8316ZR-Q1VQFN (40)7.00 mm × 5.00 mm

MCT8316ZT-Q1VQFN (40)7.00 mm × 5.00 mm

(1)For all available packages, see the orderable addendum at

the end of the data sheet.

DIRECTION

BRAKE

SPI

Only on SPI

variant

PWMinput

SPEED

FGOUT

Speed feecback

nFAULT

A

B

C

4.5V to 35V (40V abs max)

8-A peak output current,

typically 12- to 24-V,

Buck/LDO out

3.3 or 5.0 V, up to

200mA

MCT8316Z-Q1

MOSFETs

Buck/LDO Regulator

Integrated Current Sensing

Buck/LDO out

H

H

H

Hall inputs support:

Differenal Hall elements

Differenal analog output Hall-effect sensors

Digital output Hall-effect sensors

Single-ended analog output Hall-effect sensors

Sensored

Trap

Control

Simplified Schematics

MCT8316Z-Q1

SLVSGO3 – DECEMBER 2021

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.

Produktspecifikationer