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MCF8315A

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40-V max, 4-A peak, sensorless FOC control three-phase BLDC motor driver

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Data sheet

MCF8315A

ACTIVE
Data sheet Order now

Product details

Rating Catalog Architecture Integrated FET Control topology Field-oriented control (FOC), Sensorless Control interface 1xPWM, Analog, Serial Vs (min) (V) 4.5 Vs ABS (max) (V) 40 Features 5-point configurable speed profile support, Anti-voltage surge protections prevents overvoltage, Code-free Field Oriented Control (FOC), Configurable motor startup and stop options, Improved acoustic performance with automatic dead time compensation, Offline motor parameters measurement with Motor Parameter Extraction Tool (MPET), 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 Field-oriented control (FOC), Sensorless Control interface 1xPWM, Analog, Serial Vs (min) (V) 4.5 Vs ABS (max) (V) 40 Features 5-point configurable speed profile support, Anti-voltage surge protections prevents overvoltage, Code-free Field Oriented Control (FOC), Configurable motor startup and stop options, Improved acoustic performance with automatic dead time compensation, Offline motor parameters measurement with Motor Parameter Extraction Tool (MPET), Variable monitoring through DACOUT, Windmilling support through forward resynchronization and reverse drive Operating temperature range (??C) -40 to 125
VQFN (RGF) 40 35 mm² 7 x 5
  • Three-phase BLDC motor driver with integrated sensorless motor control algorithm
    • Code-free Field Oriented Control (FOC)
    • Analog, PWM and freq. based speed input modes: available only when MCF8315A is configured as a standby device (DEV_MODE = 0b)
    • I2C based speed input mode: available in both sleep (DEV_MODE = 1b) and standby devices (DEV_MODE = 0b).
    • Offline motor parameters measurement with Motor Parameter Extraction Tool (MPET)
    • 5-point configurable speed profile support
    • Windmilling support through forward resynchronization and reverse drive
    • Anti-voltage surge (AVS) protection
    • Improved acoustic performance with automatic dead time compensation
  • 4.5- to 35-V operating voltage (40-V abs max)
  • High output current capability: 4-A peak
  • Low MOSFET on-state resistance
    • RDS(ON) (HS + LS) at TA = 25°C : 240-mΩ (typ.)
  • Low power sleep mode : Refer
    • 5-µA (maximum) at VVM = 24-V, TA = 25°C
  • Speed loop accuracy: 3% with internal clock and 1% with external clock reference
  • Supports up to 75-kHz PWM frequency for low inductance motor support
  • Does not require external current sense resistors; uses built-in current sensing
  • Built-in 3.3-V, 20-mA LDO regulator
  • Built-in 3.3-V/5-V, 170-mA buck regulator
  • Dedicated DRVOFF pin to disable (Hi-Z) outputs
  • Spread spectrum and slew rate for EMI mitigation
  • Suite of integrated protection features
    • Supply under voltage lockout (UVLO)
    • Supply over voltage protection (OVP)
    • Motor lock detection (5 different types)
    • Over current protection (OCP)
    • Thermal warning and shutdown (OTW/TSD)
    • Fault condition indication pin (nFAULT)
    • Optional fault diagnostics over I2C interface
  • Three-phase BLDC motor driver with integrated sensorless motor control algorithm
    • Code-free Field Oriented Control (FOC)
    • Analog, PWM and freq. based speed input modes: available only when MCF8315A is configured as a standby device (DEV_MODE = 0b)
    • I2C based speed input mode: available in both sleep (DEV_MODE = 1b) and standby devices (DEV_MODE = 0b).
    • Offline motor parameters measurement with Motor Parameter Extraction Tool (MPET)
    • 5-point configurable speed profile support
    • Windmilling support through forward resynchronization and reverse drive
    • Anti-voltage surge (AVS) protection
    • Improved acoustic performance with automatic dead time compensation
  • 4.5- to 35-V operating voltage (40-V abs max)
  • High output current capability: 4-A peak
  • Low MOSFET on-state resistance
    • RDS(ON) (HS + LS) at TA = 25°C : 240-mΩ (typ.)
  • Low power sleep mode : Refer
    • 5-µA (maximum) at VVM = 24-V, TA = 25°C
  • Speed loop accuracy: 3% with internal clock and 1% with external clock reference
  • Supports up to 75-kHz PWM frequency for low inductance motor support
  • Does not require external current sense resistors; uses built-in current sensing
  • Built-in 3.3-V, 20-mA LDO regulator
  • Built-in 3.3-V/5-V, 170-mA buck regulator
  • Dedicated DRVOFF pin to disable (Hi-Z) outputs
  • Spread spectrum and slew rate for EMI mitigation
  • Suite of integrated protection features
    • Supply under voltage lockout (UVLO)
    • Supply over voltage protection (OVP)
    • Motor lock detection (5 different types)
    • Over current protection (OCP)
    • Thermal warning and shutdown (OTW/TSD)
    • Fault condition indication pin (nFAULT)
    • Optional fault diagnostics over I2C interface

The MCF8315A provides a single-chip, code-free sensorless FOC solution for customers driving speed-controlled 12- to 24-V brushless-DC motors (BLDC) or Permanent Magnet Synchronous motor (PMSM) up to 4-A peak current. The MCF8315A integrates three ½-bridges with 40-V absolute maximum capability and a low RDS(ON) of 240 mΩ (high-side + low-side FETs). MCF8315A integrates power management circuits including an voltage-adjustable buck regulator (3.3 V / 5 V, 170-mA) and LDO (3.3 V / 20 mA) that can be used to power external circuits.

The FOC algorithm configuration can be stored 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 MCF8315A, intended to protect the device, motor, and system against fault events.

Documentation for reference:

The MCF8315A provides a single-chip, code-free sensorless FOC solution for customers driving speed-controlled 12- to 24-V brushless-DC motors (BLDC) or Permanent Magnet Synchronous motor (PMSM) up to 4-A peak current. The MCF8315A integrates three ½-bridges with 40-V absolute maximum capability and a low RDS(ON) of 240 mΩ (high-side + low-side FETs). MCF8315A integrates power management circuits including an voltage-adjustable buck regulator (3.3 V / 5 V, 170-mA) and LDO (3.3 V / 20 mA) that can be used to power external circuits.

The FOC algorithm configuration can be stored 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 MCF8315A, 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 MCF8315A Sensorless Field Oriented Control (FOC) Integrated FET BLDC Driver datasheet PDF | HTML 25 Jan 2022
Certificate MCF8315EVM EU RoHS Declaration of Conformity (DoC) 21 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

MCF8315EVM — MCF8315 evaluation module for three-phase sensorless FOC integrated MOSFET BLDC motor driver

The MCF8315 has three half-H-bridge integrated MOSFET drivers for sensorless FOC control of a three-phase brushless DC (BLDC) motor for 4.5-V to 35-V,  5-A peak current drive. The MCx8315 integrates a buck regulator that can support 200-mA with programmable regulated supply.

EVM includes an (...)

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

MCF8315A-GUI — GUI for MCF8315EVM

GUI used to evaluate MCF8315A on the MCF8315EVM
Supported products & hardware

Supported products & hardware

Products
Integrated control BLDC drivers
MCF8315A — 40-V max, 4-A peak, sensorless FOC control three-phase BLDC motor driver
Hardware development
Evaluation board
MCF8315EVM — MCF8315 evaluation module for three-phase sensorless FOC integrated MOSFET BLDC motor driver
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Calculation tool

BLDC Integrated MOSFET Thermal Calculator (Rev. D)

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VQFN (RGF) 40 View options

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