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MCF8329A-Q1 Automotive Sensorless Field Oriented Control (FOC) Three-phase

BLDC Gate Driver

1 Features

•AEC-Q100 qualified for automotive applications

–Temperature Grade-1 : –40°C ≤ TA ≤ 125°C

•Three-phase BLDC gate driver with integrated

sensorless motor control algorithm

–Code-free Field Oriented Control (FOC)

–Speed, current, power or voltage control modes

–Forward and reverse windmilling support

–Analog, PWM, freq. or I

2

C based control input

–External MCU watchdog monitoring

–5-point configurable reference profile support

–Anti-voltage surge and active braking to prevent

DC bus overvoltage

–Flux weakening for high speed operation

–Maximum torque per ampere (MTPA) for higher

efficiency

•65V Three phase half-bridge gate driver

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

MOSFETs, 4.5 to 60V operating voltage

–Supports 100% PWM duty cycle

–Bootstrap based gate driver architecture

–1A/2A peak source/sink current

•Integrated current sense amplifier

–Adjustable gain (5, 10, 20, 40V/V)

•Low power sleep mode

–5µA (maximum) at V

PVDD

= 24V, T

A

= 25°C

•Speed loop accuracy: < 3% with internal clock

•Configurable EEPROM

•Support up to 75kHz PWM switching frequency

•LDO: 3.3V ± 3%, 50mA

•Independent driver shutdown path (DRVOFF)

•Spread spectrum for EMI mitigation

•Suite of integrated protection features

–Undervoltage protection on all supply rails

–Loss of phase (no motor) detection

–Short-circuit protection (VDS) for all 6 FETs

–Motor lock detection

–Thermal shutdown (TSD)

–Fault indication on nFAULT pin

–Optional fault diagnostics over I

2

C interface

2 Applications

•Fuel and oil pumps

•Automotive thermal management

–Coolant and water pumps

–HVAC blowers

–Engine and battery cooling fans

•Automotive body motors

–Sunroof modules, Wiper modules

–Zonal modules

3 Description

The MCF8329A-Q1 provides a single-chip, code-

free sensorless FOC solution for driving 12V or

24V automotive brushless-DC motors (BLDC) or

Permanent Magnet Synchronous motors (PMSM)

up to 1.8kHz (electrical speed). The MCF8329A-Q1

provide three half-bridge gate drivers, each capable

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

MOSFETs. The device generates the appropriate gate

drive voltages and drives the high-side MOSFETs

using a bootstrap circuit. A trickle charge pump is

included to support 100% duty cycle. The gate drive

architecture supports peak gate drive currents up

to 1A source and 2A sink. The MCF8329A-Q1 can

operate from a single power supply and supports a

wide input supply range of 4.5 to 60V.

The algorithm configuration can be stored in non-

volatile EEPROM, which allows the device to operate

stand-alone once it has been configured. There are a

large number of protection features integrated into the

MCF8329A-Q1, intended to protect the device, motor,

and system against fault events.

MCF8329A-Q1 is available in a 32-pin, 0.5mm pin

pitch, 6x4mm, wettable flank WQFN package (RRY).

Device Information

(1)

PART NUMBERPACKAGEBODY SIZE (NOM)

MCF8329A1IQRRYRQ1WQFN (32)6.00mm × 4.00mm

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

the end of the data sheet.

Documentation for reference:

•Refer MCF8329A-Q1 EVM

•Refer MCF8329A-Q1 GUI (Motor Studio)

MCF8329A-Q1

3-Phase Pre-Driver

LDO Regulator

Integrated Current

Sense Ampli



er

DIR

I

2

C

Op



onal during opera



on;

speed, diagnos



cs, or on-

the-



y con



gura



on

Analog, PWM, frequency or

commanded over I

2

C

SPEED

FG

Speed feedback

nFAULT

A

B

C

4.5 to 60V

LDO out

3.3V, up to 50mA

Bootstrap Architecture

Charge pump

N-Channel

MOSFETs

Gate Drive

Current

sense

EEPROM

Sensorless

FOC

Simplified Schematic

MCF8329A-Q1

SLLSFV1 – MARCH 2025

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