AMC8520

www.DataSheet4U.com Preliminary Specification aMC8520 SINGLE PHASE VARIABLE SPEED ADVANCED FAN CONTROLLER Product Description The aMC8520 is a full featured single phase brushless DC motor controller that contains all the required functions for an economical closed loop motor control solution that fulfills the balanced technology extended (BTX) requirements allowing a significant reduction of acoustic noise generation. Unique features of this device are a pulse width modulation (PWM) speed control input that is compatible with industry standard digital temperature monitors, thermistor input with adjustable gain and minimum temperature response threshold for temperature monitoring, programmable high and low temperature maximum RPM, programmable minimum RPM, current output error amplifier for easy control loop compensation. Additional features include a latching PWM for enhanced noise immunity, integrated fault timer with auto start retry, adaptive motor start timer to insure start up, combined frequency generator / rotor lock output, Hall amplifier with propriety noise immunity circuitry for proper drive sequencing, compatibility with differential non-buffered and buffered sensors, pinned out reference for Hall and circuit bias, fixed non-overlapping commutation delay for reduced power supply current spiking, two 40 V open drain top drivers, two 100 mA complementary MOSFET bottom drivers, programmable cycle-by-cycle current limiting, under voltage lockout and thermal shutdo...