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Allegro MicroSystems AMT49406 Code-Free FOC BLDC Motor Controller ICs

Allegro MicroSystems AMT49406 Code-Free FOC BLDC Motor Controller ICs are three-phase, sensorless, brushless DC (BLDC) motor drivers (gate drivers) operating from 5.5V to 50V. An integrated field-oriented control (FOC) algorithm assures the best efficiency and acoustic noise performance. AMT49406 devices optimize the motor startup performance in a stationary condition, a windmill condition, and a reverse windmill condition. Analog, PWM, or CLOCK inputs control the motor speed. Closed-loop speed control is optional, and the RPM-to-clock frequency ratio is programmable. An I2C interface designates the motor-rated voltage, rated current, rated speed, resistance, and startup profiles. The packages with an exposed thermal pad include a 24-contact 4mm x 4mm QFN (suffix ES) and a 24-lead TSSOP (suffix LP).

Features

  • Code-free sensorless field-oriented control (FOC)
  • Proprietary non-reverse fast startup
  • Soft-On/Soft-Off (SOSO) for quiet operation
  • Analog, PWM, and Clock mode speed control
  • Closed-loop speed control
  • Configurable current limit
  • Windmill startup operation
  • Lock detection
  • Short-circuit protection (OCP)
  • Brake and direction inputs
  • I2C interface
  • Lead-free and RoHS compliant

Applications

  • Ceiling fans
  • Pedestal fans
  • Bathroom exhaust fans
  • Home appliance fans and pumps

Specifications

  • Package options
    • 24-contact QFN with exposed thermal pad
    • 24-lead TSSOP with exposed thermal pad
  • 5.5V to 50V operating supply voltage range
  • 2.7V to 2.95V reference voltage range
  • ±0.5% PWM duty on/off threshold
  • Gate drive output
    • 6.5V minimum high-side, 6.8V typical
    • 6.5V minimum low-side, 7.3V typical
  • Gate drive current
    • 55mA typical source
    • 105mA typical sink
  • 1Hz to 2000Hz clock input frequency range
  • 400ns typical dead time
  • 23.3kHz to 25.4kHz motor PWM frequency range
  • -40°C to +105°C operating temperature range
  • 100% matte-tin leadframe plating

Typical Application

Application Circuit Diagram - Allegro MicroSystems AMT49406 Code-Free FOC BLDC Motor Controller ICs

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Published: 2023-08-09 | Updated: 2023-08-29