The A4945 and A4949 three phase motor drivers incorporate sinusoidal drive to minimize audible noise and vibration for medium power fans.
A Speed input is provided to control motor speed.
This allows system cost savings by eliminating an external variable power supply.
Alternatively, power supply mo
A4949 Features
* 180° sinusoidal drive for low audible noise
* High efficiency control algorithm
* Sensorless operation
* Analog Speed input (A4945)
* PWM Speed input (A4949)
* Wide supply voltage range
* FG speed output
* Lock detection
* Ove
Datasheet Details
A4949, A4945
Allegro
932.32 KB
Three phase sensorless sinusoidal fan driver.
This datasheet PDF includes multiple part numbers: A4949, A4945.
Please refer to the document for exact specifications by model.
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