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MCT8316Z

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40-V max, 8-A peak, sensored trapezoidal control 3-phase BLDC motor driver

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Product details

Parameters

Rating Automotive, Catalog Control method Trapezoidal Control Architecture Integrated FET Control interface 1xPWM RDS(ON) (HS + LS) (mOhms) 95 Peak output current (A) 8 Vs (Min) (V) 4.5 Vs ABS (Max) (V) 40 Features Integrated Motor Control, Integrated FETs, Buck Step Down Converter, LDO, Hardware management I/F, SPI/I2C, Teach/FG Feedback, Slew Rate Adjustment Operating temperature range (C) -40 to 125 open-in-new Find other Brushless DC (BLDC) motor drivers

Package | Pins | Size

VQFN (RGF) 40 35 mm² 7 x 5 open-in-new Find other Brushless DC (BLDC) motor drivers

Features

  • Three-phase BLDC motor driver with Sensored Trapezoidal control
  • 4.5-V to 35-V operating voltage (40-V abs max)
  • High output current capability: 8-A Peak
  • Low MOSFET on-state resistance
    • 100-mΩ RDS(ON) (HS + LS) at TA = 25°C
  • Low power sleep mode
    • 1.5-µA at VVM = 24-V, TA = 25°C
  • Configurable PWM modulation: Synchronous/Asynchronous
  • Supports Analog or Digital Hall inputs
  • Supports 200-kHz PWM frequency
  • Cycle-by-cycle current limit
  • Integrated built-in current sense
    • Doesn’t require external current sense resistors
  • Hardware or 5-MHz 16-bit SPI interface
  • Supports 1.8-V, 3.3-V, and 5-V logic inputs
  • Built-in 3.3-V (5%), 30-mA LDO regulator
  • Built-in 3.3-V/5-V, 200-mA buck regulator
  • Delay compensation reduces duty cycle distortion
  • Suite of integrated protection features
    • Supply undervoltage lockout (UVLO)
    • Charge pump undervoltage (CPUV)
    • Overcurrent protection (OCP)
    • Motor lock protection
    • Thermal warning and shutdown (OTW/OTSD)
    • Fault condition indication pin (nFAULT)
    • Optional fault diagnostics over SPI interface
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Description

The MCT8316Z provides a single-chip code-free sensored trapezoidal solution for customers driving 12- to 24-V brushless-DC motors.

The MCT8316Z integrates three 1/2-H bridges with 40-V absolute maximum capability and a very low RDS(ON) of100 mOhms (high-side and low-side combined) to enable high power drive capability. Current is sensed using an integrated current sensing feature which eliminates the need for external sense resistors. Power management features of an adjustable buck regulator and LDO generate the necessary voltage rails for the device and can be used to power external circuits.

MCT8316Z implements sensored trapezoidal control, and so an external microcontroller is not required to spin the brushless-DC motor. The algorithm is implemented in a fixed-function state machine, so no coding is needed. The device integrates three analog hall comparators for position sensing to achieve sensored trapezoidal BLDC motor control. The control scheme is highly configurable through hardware pins or register settings ranging from motor current limiting behavior to fault response. The speed can be controlled through a PWM input.

There are a large number of protection features integrated into the MCT8316Z, 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 MCT8316Z Sensored Trapezoidal Integrated FET BLDC Motor Driver datasheet Feb. 19, 2019
User guide MCT8316ZTEVM Evaluation Module (Rev. A) Jun. 14, 2021
Application note Brushless-DC Made Simple – Sensored Motor Control (Rev. B) Apr. 13, 2021
Technical article A basic brushless gate driver design – part 3: integrated vs. discrete half bridges Dec. 16, 2020
Technical article Connectivity helps integrate intelligent motor control on a single MCU Jun. 06, 2018
Technical article Cut the power and complexity of your appliance designs Feb. 06, 2018
Technical article Six weird ways to design with a brushless-DC driver Aug. 28, 2017
Application note How to Design a Thermally-Efficient Integrated BLDC Motor Drive PCB (Rev. A) Feb. 05, 2017

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
Description

The MCT8316Z is a three half-H-bridge integrated MOSFET drivers for sensored trapezoidal control of a three-phase brushless DC (BLDC) motor for 12-V/24-V DC,  8-A Peak current drive. It integrates three analog hall comparators for rotor position sensing to achieve sensored trapezoidal BLDC (...)

Features
  • 4.5-V to 35-V operation with 8-A Peak Current Drive
  • 95-mΩ on-state resistance of integrated MOSFETs
  • Integrates three analog hall comparators for rotor position sensing to achieve sensored trapezoidal BLDC motor control
  • Analog or digital hall sensor compatibility
  • On board MSP430 that handles connectivity (...)

CAD/CAE symbols

Package Pins Download
VQFN (RGF) 40 View options

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

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