Allegro has developed a new series of three phase BLDC fan drivers that result in low audible noise and vibration in addition to improved efficiency. These new sinusoidal driven ICs include both sensor-based and sensorless commutated ICs. Typical IC features include: PWM duty or analog voltage for speed control; adaptive phase advance for improved efficiency; rotor lock detection with auto restart; FG speed output; overcurrent protection; under voltage lockout; thermal shutdown and few external components for small PCB footprints and reduce system cost.
Target applications include desktop and notebook PCs, refrigerator and other white good products, ceiling and consumer fans and industrial fans and blowers. For automotive applications Allegro has a series of AEC-Q100 qualified fan driver ICs targeted at seat cooling fans, LED headlamp fans, and battery cooling fan applications.
|Motor Position Sensing||Commutation Type|
|A4945*||Appliance, Seat, LED, Battery Cooling||•||•|
|A4949*||Appliance, Seat, LED, Battery Cooling||•||•|
|A4946*||Seat, LED, Battery Cooling||•||•|
|A5940*||Appliance, Personal Computers, Seat, LED, Battery Cooling||•||•|
|A5941||Appliances, Personal Computers||•||•|
|A5944||Notebook Personal Computers||•||•|
Note: * indicates high temperature or automotive option available