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MCT8316A High Speed Sensorless Trapezoidal Control Integrated FET BLDC Driver

1 Features

•Three-phase BLDC motor driver with integrated

sensorless motor control algorithm

–Code-free high speed Trapezoidal Control

–Supports upto 3 kHz (electrical frequency)

–Very fast startup time (<50 ms)

–Fast Deceleration (<150 ms)

–Supports 120° or 150° modulation to improve

acoustic performance

–Windmilling support through forward

resynchronization and reverse drive

–Analog, PWM, freq. or I

2

C based speed input

–Active Demagnetization to reduce power losses

–Configurable motor startup and stop options

–Optional closed loop speed control

–Anti-voltage surge protections prevents

overvoltage

–Variable monitoring through DACOUT

•4.5- 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

–3-µA (maximum) at V

VM

= 24-V, T

A

= 25°C

•Speed loop accuracy: 3% with internal clock and

1% with external clock reference

•Flexible device configuration options

–MCT8316AV: I

2

C interface (EEPROM)

–MCT8316AT: Hardware pin based configuration

•Supports up to 100-kHz PWM frequency for low

inductance motor support

•Does not require external current sense resistor

•Built-in 3.3-V ±5%, 20-mA LDO regulator

•Built-in 3.3-V/5-V, 170-mA buck regulator

•Dedicated DRVOFF pin to disable (Hi-Z) outputs

•Spread spectrum and slew rate for EMI mitigation

•Suite of Integrated protection features

–Supply undervoltage lockout (UVLO)

–Motor lock detection (5 different types)

–Overcurrent protection (OCP)

–Thermal warning and shutdown (OTW/TSD)

–Fault condition indication pin (nFAULT)

–Optional fault diagnostics over I

2

C interface

2 Applications

•Brushless-DC (BLDC) Motor Modules

•Robotic Vacuum Suction Motors

•Motor Cycle Fuel Pumps

•Appliance Fans and Pumps

•Automotive Fan and Blowers

•Medical CPAP Blowers

3 Description

The MCT8316A provides a single-chip, code-

free sensorless trapezoidal solution for customers

requiring high speed operation (up to 3kHz electrical)

or very fast startup time (<50ms) for 12- to 24-V

brushless-DC motors up to 8-A peak current. The

MCT8316A integrates three 1/2-H bridges with 40-V

absolute maximum capability and a very low R

DS(ON)

of 95 mΩ (high-side + low-side). Power management

features of an adjustable buck regulator and LDO

generate the 3.3-V or 5.0-V voltage rails for the device

and can be used to power external circuits.

Sensorless trapezoidal control is highly configurable

through register settings (MCT8316AV) or hardware

pins (MCT8316AT) ranging from motor start-up

behavior to closed loop operation. Register settings

for MCT8316AV can be set in non-volatile EEPROM,

which allows the device to operate stand-alone once

it has been configured. The device receives a speed

command through a PWM input, analog voltage,

variable frequency square wave or I

2

C command.

There are a large number of protection features

integrated into the MCT8316A, intended to protect the

device, motor, and system against fault events.

Device Information

(1)

PART NUMBERPACKAGEBODY SIZE (NOM)

MCT8316A1VVQFN (40)7.00 mm × 5.00 mm

MCT8316A1TVQFN (40)7.00 mm × 5.00 mm

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

the end of the data sheet.

Documentation for reference:

•Refer E2E FAQ for clarification.

•Refer MCT8316A tuning guide

•Refer to the MCT8316A EVM GUI

MCT8316A

MOSFETs

Buck/LDO Regulator

Integrated Current Sensing

EEPROM

/HW

Sensorless

Trap

DIRECTION

BRAKE

I

2

C/HW

Op



onal during opera



on;

I

2

C speed, diagnos



cs, or

on-the-



y con



gura



on

PWM, analog, frequency or

commanded over I

2

C

SPEED

FG

Speed feecback

nFAULT

DACOUTx

Op



onal real-



me variable

monitoring, 12-bit DAC

A

B

C

4.5 to 35-V (40-V abs max)

8-A peak output current,

typically 12 to 24-V

Buck out

3.3 or 5.0-V, up to 170-mA

A

LDO out

3.3-V, up to 20-mA

Simplified Schematic

MCT8316A

SLLSFH8B – AUGUST 2021 – REVISED FEBRUARY 2022

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