A5947-B中文資料Allegro數(shù)據(jù)手冊(cè)PDF規(guī)格書

FEATURES AND BENEFITS

? AEC-Q100 qualified

? Speed curve configuration via EEPROM

? I2C serial port

? Sinusoidal modulation for reduced audible noise and

low vibration

? Sensorless (no Hall sensors required)

? Low RDS(ON) power MOSFETs

? 3.3 V / 20 mA linear regulator

? PWM or analog speed input

? FG speed output

? Slew rate control

? Lock detection

? Soft start

? Low power standby mode

? Overcurrent protection

? Overvoltage protection

DESCRIPTION

The A5947-B three phase motor driver IC incorporates

sensorless sinusoidal drive to minimize vibration for a wide

variety of fan applications. Sensorless control eliminates the

requirement for Hall sensors.

A flexible closed-loop speed control system is integrated into

the IC. EEPROM is used to tailor the common functions of the

fan speed curve to a specific application. This eliminates the

requirement for a microprocessor-based system and minimizes

programming requirements.

The A5947-B is available in a 20-lead TSSOP with exposed

thermal pad (suffix LP).