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MCF8329A Sensorless Field Oriented Control (FOC) Three-phase BLDC Gate Driver

1 Features

•Three-phase BLDC gate driver with integrated

sensorless motor control algorithm

–Code-free single shunt Field Oriented Control

–Supports up to 1.8 kHz (electrical frequency)

–Support flux weakening control

–Forward and reverse windmilling support

–Analog, PWM, freq., or I

2

C based control input

–Configurable motor startup and stop options

–Optional closed-loop speed or power or current

control or modulation index control

–5-point configurable reference profile support

–Anti-voltage surge prevents overvoltage

–Improved acoustic performance with automatic

dead time compensation

–Support maximum torque per ampere (MTPA)

–Offline motor back EMF measurement

–Variable monitoring through DACOUT

•65-V Three-phase gate driver

–Drives 3 high-side and 3 low-side N-Channel

MOSFETs, 4.5 to 60-V operating voltage

–Supports 100% PWM duty cycle

–Bootstrap-based gate driver architecture

–1-A/2-A Maximum peak source/sink current

•Integrated current sense amplifier

–Adjustable gain (5, 10, 20, 40 V/V)

•Low-power sleep mode

–5-µA (maximum) at V

PVDD

= 24-V, T

A

= 25°C

•Speed loop accuracy: < 3% with internal clock

•Configurable non-volatile memory (EEPROM) to

store device configuration

•Supports up to 75-kHz PWM frequency for low

inductance motor support

•Accurate LDO (AVDD) 3.3-V ±3%, 50-mA support

with AVDD connected to VREG

•Independent driver shutdown path (DRVOFF)

•Spread spectrum for EMI mitigation

•A suite of integrated protection features

–Supply under-voltage lockout (UVLO)

–Motor lock detection (3 different types)

–Over-current protection (OCP)

–Thermal shutdown (TSD)

–Fault condition indication pin (nFAULT)

–Optional fault diagnostics over I

2

C interface

2 Applications

•Brushless-DC (BLDC) Motor Modules

•Cordless Vacuum Cleaners

•Washer and Dishwashers Pumps

•Appliance Fans and Pumps

•Cordless Garden and Power Tools, Lawnmowers

3 Description

The MCF8329A provides a single-chip, code-free

sensorless FOC solution for applications driving

brushless-DC motors (BLDC) or Permanent Magnet

Synchronous motor (PMSM). The MCF8329A

provides three half-bridge gate drivers, each capable

of driving high-side and low-side N-channel power

MOSFETs. The device generates the correct gate

drive voltages using an internal charge pump and

enhances the high-side MOSFETs using a bootstrap

circuit. A trickle charge pump is included to support a

100% duty cycle. The MCF8329A can operate from a

single power supply and supports a wide input supply

range of 4.5 to 60 V.

The algorithm configuration can be stored in non-

volatile EEPROM, which allows the device to operate

stand-alone once it has been configured. Motor

current is sensed using an integrated current-sensing

amplifier supporting a single external shunt resistor.

MCF8329A integrates a large number of protection

features, intended to protect the device, motor, and

system against fault events.

Device Information

(1)

PART NUMBERPACKAGEBODY SIZE (NOM)

MCF8329A1IREERVQFN (36)5.00 mm × 4.00 mm

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

the end of the data sheet.

MCF8329

3-Phase Pre-Driver

LDO Regulator

Integrated Current

Sense Ampli



er

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

Speedfeecback

nFAULT

DACOUT

Op



onal real-



me variable

monitoring, 12-bit DAC

A

B

C

4.5 to 60-V

LDO out

3.3-V, up to 80-mA

Bootstrap Architecture

Charge pump

N-Channel

MOSFETs

Gate Drive

Current

sense

EEPROM

Sensorless

FOC

Simplified Schematic

MCF8329A

SLLSFQ7 – NOVEMBER 2023

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