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MCT8317A

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24-V max, 5-A peak, sensorless trapezoidal control three-phase BLDC motor driver

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Data sheet

MCT8317A

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Data sheet Order now

Product details

Rating Catalog Architecture Integrated FET Control topology Sensorless, Trapezoidal Control interface 1xPWM, Analog, Serial Vs (min) (V) 4.5 Vs ABS (max) (V) 24 Features 120 or 150 degree modulation for improved acoustic performance, Active Demag to reduce power losses, Code-free high speed sensorless trapezoidal control, Configurable motor startup and stop options, Fast Deceleration (<100 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 Integrated FET Control topology Sensorless, Trapezoidal Control interface 1xPWM, Analog, Serial Vs (min) (V) 4.5 Vs ABS (max) (V) 24 Features 120 or 150 degree modulation for improved acoustic performance, Active Demag to reduce power losses, Code-free high speed sensorless trapezoidal control, Configurable motor startup and stop options, Fast Deceleration (<100 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 2E+1 mm² 4 x 5
  • Three-phase BLDC motor driver with integrated sensorless motor control algorithm
    • Code-free high speed Trapezoidal Control
    • Supports up to 3 kHz (electrical frequency)
    • Very fast start-up time (< 50 ms)
    • Fast Deceleration (< 150 ms)
    • Supports 120° or 150° modulation to improve acoustic performance
    • Closed loop speed or power control
    • Configurable profiles for speed or power input reference
    • Windmilling support through forward resynchronization and reverse drive
    • Analog, PWM, freq. or I2C based speed input
    • Configurable motor start-up and stop options
    • Anti-voltage surge (AVS) protection prevents DC bus voltage spike during motor deceleration
    • Variable monitoring through DACOUT
  • 4.5- to 20-V operating voltage (24-V abs max)
  • High output current capability: 5-A peak
  • Low MOSFET on-state resistance
    • RDS(ON) (HS + LS) at TA = 25°C : 130-mΩ
  • Low power sleep mode
    • 7-µA (maximum) at VVM = 12-V, TA = 25°C
  • Speed loop accuracy: 3% with internal clock and 1% with external clock reference
  • Supports up to 100-kHz PWM frequency for low inductance motor support
  • Does not require external current sense resistor
  • Built-in 3.3-V ±5%, 20-mA LDO regulator
  • Spread spectrum and slew rate for EMI mitigation
  • Suite of Integrated protection features
    • Supply under voltage lockout (UVLO)
    • Motor lock detection (5 different types)
    • Over current protection (OCP)
    • Over temperature warning and shutdown (OTW/OTS)
    • Fault condition indication pin (nFAULT)
    • Optional fault diagnostics over I2C interface
  • Three-phase BLDC motor driver with integrated sensorless motor control algorithm
    • Code-free high speed Trapezoidal Control
    • Supports up to 3 kHz (electrical frequency)
    • Very fast start-up time (< 50 ms)
    • Fast Deceleration (< 150 ms)
    • Supports 120° or 150° modulation to improve acoustic performance
    • Closed loop speed or power control
    • Configurable profiles for speed or power input reference
    • Windmilling support through forward resynchronization and reverse drive
    • Analog, PWM, freq. or I2C based speed input
    • Configurable motor start-up and stop options
    • Anti-voltage surge (AVS) protection prevents DC bus voltage spike during motor deceleration
    • Variable monitoring through DACOUT
  • 4.5- to 20-V operating voltage (24-V abs max)
  • High output current capability: 5-A peak
  • Low MOSFET on-state resistance
    • RDS(ON) (HS + LS) at TA = 25°C : 130-mΩ
  • Low power sleep mode
    • 7-µA (maximum) at VVM = 12-V, TA = 25°C
  • Speed loop accuracy: 3% with internal clock and 1% with external clock reference
  • Supports up to 100-kHz PWM frequency for low inductance motor support
  • Does not require external current sense resistor
  • Built-in 3.3-V ±5%, 20-mA LDO regulator
  • Spread spectrum and slew rate for EMI mitigation
  • Suite of Integrated protection features
    • Supply under voltage lockout (UVLO)
    • Motor lock detection (5 different types)
    • Over current protection (OCP)
    • Over temperature warning and shutdown (OTW/OTS)
    • Fault condition indication pin (nFAULT)
    • Optional fault diagnostics over I2C interface

The MCT8317A provides a single-chip, code-free sensorless trapezoidal solution for customers requiring high speed operation (up to 3 kHz electrical) or very fast start-up time (< 50 ms) for 12-V brushless-DC motors up to 5-A peak current. The MCT8317A integrates three ½-bridges with 24-V absolute maximum capability and a very low RDS(ON) of 130 mΩ (high-side + low-side FETs). MCT8317A also features an LDO that generates a 3.3-V voltage rail and can source up to 20 mA to power external circuits.

Sensorless trapezoidal control is highly configurable through register settings ranging from motor start-up behavior to closed loop operation. Register settings for MCT8317A can be set in non-volatile EEPROM, which allows the device to operate stand-alone once it has been configured. The device receives a speed command through a PWM input, analog voltage, variable frequency square wave or I2C command. There are a large number of protection features integrated into the MCT8317A, intended to protect the device, motor, and system against fault events.

Documentation for reference:

The MCT8317A provides a single-chip, code-free sensorless trapezoidal solution for customers requiring high speed operation (up to 3 kHz electrical) or very fast start-up time (< 50 ms) for 12-V brushless-DC motors up to 5-A peak current. The MCT8317A integrates three ½-bridges with 24-V absolute maximum capability and a very low RDS(ON) of 130 mΩ (high-side + low-side FETs). MCT8317A also features an LDO that generates a 3.3-V voltage rail and can source up to 20 mA to power external circuits.

Sensorless trapezoidal control is highly configurable through register settings ranging from motor start-up behavior to closed loop operation. Register settings for MCT8317A can be set in non-volatile EEPROM, which allows the device to operate stand-alone once it has been configured. The device receives a speed command through a PWM input, analog voltage, variable frequency square wave or I2C command. There are a large number of protection features integrated into the MCT8317A, intended to protect the device, motor, and system against fault events.

Documentation for reference:

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Technical documentation

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Type Title Date
* Data sheet MCT8317A High Speed Sensorless Trapezoidal Control Integrated FET BLDC Driver datasheet PDF | HTML 22 Feb 2022
Certificate MCT8317EVM EU RoHS Declaration of Conformity (DoC) 16 Dec 2022
Technical article How to achieve efficient, reliable and accurate actuation in real-time motor control systems 25 Oct 2022
Technical article Understanding brushless-DC motor systems, part 2 20 Oct 2021
Technical article Understanding brushless-DC motor systems, part 1 18 Oct 2021
Technical article A basic brushless gate driver design – part 3: integrated vs. discrete half bridges 16 Dec 2020

Design & development

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

Evaluation board

MCT8317EVM — MCT8317 evaluation module for three-phase sensorless trapezoidal BLDC motor driver

The MCT8317 is a 4.5-V to 20-V, 5-A peak integrated three-phase gate driver IC with sensorless trapezoidal for motor drive applications. It provides three accurately-trimmed and temperature-compensated half-bridge MOSFETS, gate drivers, charge pump, current sense amplifier, linear regulator for the (...)

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

MCT8317A-GUI — GUI for the MCT8317EVM

GUI used to evaluate MCT8317A on the MCT8317EVM
Supported products & hardware

Supported products & hardware

Products
Integrated control BLDC drivers
MCT8317A — 24-V max, 5-A peak, sensorless trapezoidal control three-phase BLDC motor driver
Hardware development
Evaluation board
MCT8317EVM — MCT8317 evaluation module for three-phase sensorless trapezoidal BLDC motor driver
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WQFN (REE) 36 View options

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