Texas Instruments MCT8316Z Handleiding

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MCT8316Z Sensored Trapezoidal Integrated FET BLDC Motor Driver

1 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 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: 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

2 Applications

•Brushless-DC (BLDC) Motor Modules

•Small home appliances

•HVAC motors

•Office automation machines

•Factory automation and robotics

3 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 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.

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.

Device Information

(1)

PART NUMBERPACKAGEBODY SIZE (NOM)

MCT8316ZRVQFN (40)7.00 mm × 5.00 mm

MCT8316ZTVQFN (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

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 Schematic

MCT8316Z

SLVSF18B – MARCH 2021 – REVISED NOVEMBER 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.

Product specificaties