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MCT8329A

ACTIVE

60-V sensorless trapezoidal control three-phase BLDC gate driver

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Data sheet

MCT8329A

ACTIVE
Data sheet Order now

Product details

Rating Catalog Architecture Gate driver Control topology Sensorless, Trapezoidal Control interface 1xPWM, Analog, Serial Vs (min) (V) 4.5 Vs ABS (max) (V) 60 Features 120 or 150 degree modulation for improved acoustic performance, Code-free high speed sensorless trapezoidal control, Configurable motor startup and stop options, Fast Deceleration (<150 ms), Fast startup time (<50 ms), Integrated protections UVLO,OCP,OTW-OTSD,AVS, Optional closed loop speed control, Stand-alone operation, Up to 3 kHz (electrical frequency), Variable monitoring through DACOUT, Windmilling support through forward resynchronization and reverse drive Operating temperature range (°C) -40 to 125
Rating Catalog Architecture Gate driver Control topology Sensorless, Trapezoidal Control interface 1xPWM, Analog, Serial Vs (min) (V) 4.5 Vs ABS (max) (V) 60 Features 120 or 150 degree modulation for improved acoustic performance, Code-free high speed sensorless trapezoidal control, Configurable motor startup and stop options, Fast Deceleration (<150 ms), Fast startup time (<50 ms), Integrated protections UVLO,OCP,OTW-OTSD,AVS, Optional closed loop speed control, Stand-alone operation, Up to 3 kHz (electrical frequency), Variable monitoring through DACOUT, Windmilling support through forward resynchronization and reverse drive Operating temperature range (°C) -40 to 125
WQFN (REE) 36 20 mm² 4 x 5
  • Three-phase BLDC gate driver with integrated sensorless motor control algorithm
    • Code-free high speed Trapezoidal Control
    • Supports up to 3 kHz (electrical frequency)
    • Very fast startup time (<50 ms)
    • Fast Deceleration (<150 ms)
    • Supports 120° or 150° modulation to improve acoustic performance
    • Forward and reverse windmilling support
    • Analog, PWM, freq. or I2C based control input
    • Configurable motor startup and stop options
    • Optional closed loop speed or power control, open loop voltage control
    • 5-point configurable reference profile support
    • Anti-voltage surge prevents overvoltage
    • Variable monitoring through DACOUT
  • 65-V Three phase half-bridge 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 VPVDD = 24-V, TA = 25°C
  • Speed loop accuracy: < 3% with internal clock
  • Supports up to 100-kHz PWM frequency
  • 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
  • Suite of Integrated protection features
    • Supply undervoltage lockout (UVLO)
    • Motor lock detection (3 different types)
    • Overcurrent protection (OCP)
    • Thermal shutdown (TSD)
    • Fault condition indication pin (nFAULT)
    • Optional fault diagnostics over I2C interface
  • Three-phase BLDC gate driver with integrated sensorless motor control algorithm
    • Code-free high speed Trapezoidal Control
    • Supports up to 3 kHz (electrical frequency)
    • Very fast startup time (<50 ms)
    • Fast Deceleration (<150 ms)
    • Supports 120° or 150° modulation to improve acoustic performance
    • Forward and reverse windmilling support
    • Analog, PWM, freq. or I2C based control input
    • Configurable motor startup and stop options
    • Optional closed loop speed or power control, open loop voltage control
    • 5-point configurable reference profile support
    • Anti-voltage surge prevents overvoltage
    • Variable monitoring through DACOUT
  • 65-V Three phase half-bridge 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 VPVDD = 24-V, TA = 25°C
  • Speed loop accuracy: < 3% with internal clock
  • Supports up to 100-kHz PWM frequency
  • 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
  • Suite of Integrated protection features
    • Supply undervoltage lockout (UVLO)
    • Motor lock detection (3 different types)
    • Overcurrent protection (OCP)
    • Thermal shutdown (TSD)
    • Fault condition indication pin (nFAULT)
    • Optional fault diagnostics over I2C interface

The MCT8329A provides a single-chip, code-free sensorless trapezoidal solution for applications requiring high speed operation or very fast startup time for three phase brushless-DC motors. The device provide three half-bridge gate drivers, each capable of driving high-side and low-side N-channel power MOSFETs. The device generates 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 100% duty cycle. The gate drive architecture supports peak gate drive currents up to 1-A source and 2-A sink. The MCT8329A can operate from a single power supply and supports a wide input supply range of 4.5 to 60 V.

Sensorless trapezoidal control is highly configurable through register settings in a non-volatile EEPROM (MCT8329A1I) ranging from motor start-up behavior to closed loop operation, which allows the device to operate stand-alone once it has been configured. Motor current is sensed using an integrated current sensing amplifier supporting single external shunt resistor. The device receives a speed command through a PWM input or analog voltage or variable frequency square wave or I2C command. There are a large number of protection features integrated into the MCT8329A, intended to protect the device, motor, and system against fault events.

The MCT8329A provides a single-chip, code-free sensorless trapezoidal solution for applications requiring high speed operation or very fast startup time for three phase brushless-DC motors. The device provide three half-bridge gate drivers, each capable of driving high-side and low-side N-channel power MOSFETs. The device generates 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 100% duty cycle. The gate drive architecture supports peak gate drive currents up to 1-A source and 2-A sink. The MCT8329A can operate from a single power supply and supports a wide input supply range of 4.5 to 60 V.

Sensorless trapezoidal control is highly configurable through register settings in a non-volatile EEPROM (MCT8329A1I) ranging from motor start-up behavior to closed loop operation, which allows the device to operate stand-alone once it has been configured. Motor current is sensed using an integrated current sensing amplifier supporting single external shunt resistor. The device receives a speed command through a PWM input or analog voltage or variable frequency square wave or I2C command. There are a large number of protection features integrated into the MCT8329A, intended to protect the device, motor, and system against fault events.
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Technical documentation

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Type Title Date
* Data sheet MCT8329A High Speed Sensorless Trapezoidal Control Three-phase BLDC Gate Driver datasheet PDF | HTML 05 Jan 2023
Application note How to Program I2C for MCx83xx Device Family PDF | HTML 24 Mar 2025
Application note Motor Pre-Startup Tuning for MCx83xx PDF | HTML 24 Mar 2025
Application note MCF83xx and MCT83xx EEPROM Read and Write Procedure PDF | HTML 13 Mar 2025
Technical article Selecting the right level of integration to meet motor design requirements PDF | HTML 04 Jan 2024
Technical article Top 3 ways to reduce audible noise in motion control applications PDF | HTML 21 Dec 2023
Application brief High-Efficiency Sensorless, Code-Free BLDC Motor Drives for Scalable Systems 03 May 2023
Certificate MCT8329EVM EU RoHS Declaration of Conformity (DoC) 16 Dec 2022

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

MCT8329EVM — MCT8329 evaluation module for three-phase sensorless trapezoidal BLDC gate driver

The MCT8329 is a 4.5-V to 60-V, three-phase BLDC gate driver IC with code-free sensorless trapezoidal control for motor drive applications. It provide three half-bridge gate drivers, each capable of driving highside and low-side N-channel power MOSFETs.

The device generates the correct gate drive (...)

User guide: PDF | HTML
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GUI for evaluation module (EVM)

MCT8329A-GUI — GUI for the MCT8329EVM

GUI used to evaluate MCT8329A on the MCT8329EVM
Supported products & hardware

Supported products & hardware

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Integrated control BLDC drivers
  • MCT8329A — 60-V sensorless trapezoidal control three-phase BLDC gate driver
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Evaluation board
  • MCT8329EVM — MCT8329 evaluation module for three-phase sensorless trapezoidal BLDC gate driver
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WQFN (REE) 36 Ultra Librarian
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