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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fmcf8316a”>View Datasheet

Texas Instruments MCF8361A Sensorless FOC 3-Phase BLDC Driver

Texas Instruments MCF8361A Sensorless Field Oriented Control (FOC) 3-Phase Brushless DC Motor (BLDC) Driver provides a single-chip, code-free, sensorless FOC solution for driving speed-controlled 12V to 24V BLDC or Permanent Magnet Synchronous Motors (PMSM) with 8A peak current capability. The MCF8316A integrates three 1/2H bridges with 40V absolute maximum capability and a very low RDS(ON) of 95mΩ (high-side plus low-side). Power management features of an adjustable buck regulator and LDO generate the 3.3V or 5.0V voltage rails and can be used to power external circuits.

The algorithm configuration can be stored in non-volatile EEPROM, allowing the device to operate stand-alone once configured. The device receives a speed command through a PWM input, analog voltage, variable frequency square wave, or I2C command. Many protection features are integrated into the Texas Instruments MCF8316A, intended to protect the device, motor, and system against fault events.

Features

  • Three-phase BLDC motor driver with an integrated motor control algorithm
    • Code-free Field Oriented Control (FOC)
    • Offline motor parameters measurement with Motor Parameter Extraction Tool (MPET)
    • 5-point configurable speed profile support
    • Windmilling support through forward resynchronization and reverse drive
    • Configurable motor startup and stop options
    • Anti-voltage surge protections prevent overvoltage
    • Improved acoustic performance with automatic dead time compensation
    • Variable monitoring through DACOUT
  • 4.5V to 35V operating voltage (40V absolute maximum)
  • High 8A peak output current capability
  • Low MOSFET on-state resistance, 95mΩ RDS(ON) (HS + LS) at TA = +25°C
  • Speed loop accuracy
    • 3% with internal clock
    • 1% with external clock reference
  • Low power sleep mode, 3µA (maximum) at VVM = 24V, TA = +25°C
  • Customer-configurable non-volatile memory (EEPROM) to store device configuration
  • Supports up to 75kHz PWM frequency for low inductance motor support
  • Built-in current sensing, does not require external current sense resistors
  • Built-in 3.3V ±5%, 20mA LDO regulator
  • Built-in 3.3V/5V, 170mA buck regulator
  • DRVOFF independent pin to disable output
  • Spread spectrum and slew rate for EMI mitigation
  • Suite of integrated protection features
    • Supply undervoltage lockout (UVLO)
    • Motor lock detection (5 different types)
    • Charge pump undervoltage (CPUV)
    • Overcurrent protection (OCP)
    • Thermal warning and shutdown (OTW/OTSD)
    • Fault condition indication pin (nFAULT)
    • Optional fault diagnostics over I2C interface

Applications

  • Brushless-DC (BLDC) motor modules
  • Residential and living fans
  • Air purifiers and humidifier fans
  • Washer and dishwasher pumps
  • Automotive fan and blowers
  • Medical CPAP blowers

Videos

Simplified Schematic

Schematic - Texas Instruments MCF8361A Sensorless FOC 3-Phase BLDC Driver

Block Diagram

Block Diagram - Texas Instruments MCF8361A Sensorless FOC 3-Phase BLDC Driver

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Texas Instruments MCF8361A Sensorless FOC 3-Phase BLDC Driver