AMT49406: Code-Free FOC Sensorless BLDC Motor Controller

Description

The AMT49406 is a 3-phase, sensorless, brushless DC (BLDC) motor driver (gate driver) which can operate from 5.5 to 50 V—Allegro’s first QuietMotion solution. The AMT49406 is ideal for ceiling fans, pedestal fans, bathroom exhaust fans and home appliance fans and pumps.

A field-oriented control (FOC) algorithm is fully integrated to achieve the best efficiency and acoustic noise performance. The device optimizes the motor startup performance in a stationary condition, a windmill condition, and even in a reverse windmill condition.

Motor speed is controlled through analog, PWM, or CLOCK input. Closed-loop speed control is optional, and RPM-to-clock frequency ratio is programmable.

A simple I2C interface is provided for setting motor-rated voltage, rated current, rated speed, resistance, and startup profiles. 

The AMT49406 is available in a 24-contact 4 mm × 4 mm QFN with exposed thermal pad (suffix ES) and a 24-lead TSSOP with exposed thermal pad (suffix LP). These packages are lead (Pb) free, with 100% matte-tin leadframe plating.

 

Top Features

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

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
AMT49406GESSR 24-lead QFN -40°C to 105°C Yes View Data New Contact your
local sales rep
Check
Distributor Stock
AMT49406GLPTR 24-lead TSSOP -40°C to 105°C Yes View Data New Contact your
local sales rep
Check
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

24 contact QFN ES and 24 lead TSSOP LP packages

Packaging

24-contact QFN with exposed thermal pad 4mm x 4mm x 0.75mm (ES package)

24-lead TSSOP with exposed thermal pad (LP package)