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The A5940 three phase motor driver incorporates sinusoidal drive to minimize audible noise and vibration for medium power fans.
A sinusoidal voltage profile is applied to the windings of the motor at startup to quietly startup and gradually ramp up the motor to desired speed.
This device is available in both automotive and commercial grade.
10-contact 3 mm x 3 mm DFN package with exposed thermal pad (suffix EJ)
EJ Package Documentation
10-lead SOIC (suffix LN)
LN Package Documentation
10-lead SOIC with exposed thermal pad (suffix LK)
LK Package Documentation