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 I2C 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 VPVDD = 24V, TA = 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 I2C 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, codefree

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 nonvolatile

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).