... .The functions include PFC (passive), control input 0-10 VDC / PWM, output 10 VDC max 1.1 mA, fault signal relay, Over ... as Supply voltage range, No noise, hall-free, power,etc.Applications: External rotor motor, centrifugal fan, centrifugal blower, axial fan in HVAC,Tele ... rotor brushless dc motor, EC motor, energy saving motor,etc. Low noise 48V BLDC Fan motor driver or controller with tach output