A89301: Ultra-Quiet, Code-Free, FOC Sensorless BLDC Motor Controller

A89301 Product Image


Top Features

The A89301 is a 3-phase, sensorless, brushless DC (BLDC) motor driver (gate driver) which can operate from 5.5 to 50 V—one of Allegro’s first QuietMotion solutions. The A89301 is ideal for ceiling fans, pedestal fans, bathroom exhaust fans and premium 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 I2C interface is also used for on/off control, speed control, and speed readback.

The A89301 is available in a 24-contact 4 mm × 4 mm QFN with exposed thermal pad (suffix ES). The package is lead (Pb) free, with 100% matte tin leadframe plating.


QuietMotion logo

  • Coding-free sensorless field-oriented control (FOC)
  • I2C interface for speed control and status readback
  • Ultra-quiet low speed operation
  • 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
  • Adjustable gate drive

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Part Composition /
RoHS Data
Comments Samples Check Stock
APEK89301GES-01-T DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep
Distributor Stock
A89301GESSR 24-lead QFN -40°C to 105°C -- View Data Contact your
local sales rep
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 with exposed thermal pad 4mm x 4mm x0.75 mm (ES Package)

ES 24 Package

Download ES Package Documentation

Design Support Tools

Allegro Customer Portal: Gain access to Allegro product software and design tools.

Technical Articles

Sensorless and Always Without Reverse Rotation: Rapid and Accurate Startup for Blower Fan Motors »