Fan motors simplify appliance device and reduce noise

Three devices designed to drive three-phase BLDC motors have been announced by ON Semiconductor. The LV8811, LV8813, and LV8814 reduce acoustic noise in cooling fans in appliances such as refrigerators, as well as games consoles and computing equipment.
Voltage ranges are 3.6 to 16V ( LV8811), 6.0 to 16V (LV8813) and 3.6 to 16V (LV8814). Acoustic noise is reduced through the use of 180 degree sinusoidal driving to drive the motors, says the company. The integrated, software-less motor drivers simplify motor control circuit design by eliminating software development time, in addition to reducing acoustic noise and vibration. They also enable deployment of energy efficient motor controls, claims the company. They can be controlled by a single Hall sensor, reducing system costs. Motor speed can be set by either a PWM signal or a DC voltage. The lead angle can also be adjusted.
All three incorporate over-current, over-voltage, under-voltage, and over-temperature protection functions. There is locked rotor protection and auto-recovery mechanisms, together with soft start-up and shutdown functionality to ensure operational stability is maintained.
The devices are supplied in RoHS-compliant TSSOP-20J/SSOP-20 packages.
http://www.onsemi.com

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