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).