Texas Instruments MCT8316A-Q1 Handleiding

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MCT8316A-Q1 High Speed Sensorless Trapezoidal Control Integrated FET BLDC

Driver

1 Features

•AEC-Q100 qualified for automotive applications

–Temperature Grade-1 : –40°C ≤ T

A

≤ 125°C

•Three-phase BLDC motor driver with integrated

sensorless motor control algorithm

–Code-free high speed Trapezoidal Control

–Supports upto 3kHz (electrical frequency)

–Very fast startup time (<50ms)

–Fast Deceleration (<150ms)

–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 35V operating voltage (40V abs max)

•High output current capability: 8A peak

•Low MOSFET on-state resistance

–95mΩ R

DS(ON)

(HS + LS) at T

A

= 25°C

•Low power sleep mode

–3µA (maximum) at V

VM

= 24-V, T

A

= 25°C

•Speed loop accuracy: 3% with internal clock and

1% with external clock reference

•Supports up to 100kHz PWM frequency for low

inductance motor support

•Does not require external current sense resistor

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

•Built-in 3.3V/5V, 170mA 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

•Two wheeler Fuel Pumps

•Headrest Control Modules

3 Description

The MCT8316A-Q1 provides a single-chip, code-free

sensorless trapezoidal device for customers requiring

high speed operation (up to 3kHz electrical) or very

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

DC motors up to 8A peak current. The MCT8316A-

Q1 integrates three 1/2-H bridges with 40V absolute

maximum capability and a very low R

DS(ON)

of 95mΩ

(high-side + low-side). Power management features

of an adjustable buck regulator and LDO generate the

3.3V or 5.0V voltage rails for the device and can be

used to power external circuits.

Sensorless trapezoidal control is highly configurable

ranging from motor start-up behavior to closed loop

operation through register settings. These settings

can be saved in non-volatile EEPROM, which allows

the device to operate stand-alone once the device

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-Q1, intended to protect

the device, motor, and system against fault events.

Device Information

PART NUMBERPACKAGE

(1)

PACKAGE

SIZE (NOM)

(2)

MCT8316A1VQRGFRQ1

Wettable flank VQFN

(40)

7.00mm ×

5.00mm

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

the end of the data sheet.

(2)The package size (length × width) is a nominal value and

includes pins, where applicable.

Documentation for reference:

•Refer E2E FAQ for clarification.

•Refer MCT8316A-Q1 tuning guide

•Refer to the MCT8316A-Q1 EVM GUI

MCT8316A-Q1

MOSFETs

Buck/LDO Regulator

Integrated Current Sensing

EEPROM

/HW

Sensorless

Trap

DIRECTION

BRAKE

I

2

C

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-Q1

SLLSFS3 – MAY 2024

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