Really quiet. Easy to implement. Extremely efficient. Allegro’s QuietMotion family offers the first-to-market Field Oriented Control (FOC) brushless DC (BLDC) electric motor controllers that are customer code-free. The devices are designed to provide reliable and efficient low audible noise performance while reducing design cycle time with simple parameter settings through easy to use GUI.     

QuietMotion Logo

Allegro’s QuietMotion family is code-free single shunt FOC solution that:

  • Offers leading ultra-low audible noise performance 
  • Minimizes external components, resulting in cost efficient solutions and smaller PCB designs
  • Reduces research and design expenditure by eliminating software
  • Enables for fast tuning of motors and prototyping 


Pole and ceiling fans
Air purifiers
Exhaust fans
GPU/CPU cooling fans


Coding-free, sensorless field-oriented control (FOC)
Proprietary non-reverse fast startup
Soft-On Soft-Off (SOSO) for quiet operation
Closed-loop speed control
Configurable current limit
Windmill startup operation
Lock detection
Short-circuit protection (OCP)

QuietMotion Motor Drivers Selection Guide