Features and Functions
• 120° voltage linear type.
• Soft switching type eliminating noises caused by current switching and making the values of external capacitors smaller (comparable to those of chip capacitors).
• On-chip FG amplifier.
• On-chip thermal shutdown circuit.
• The FG signal can be used to detect the rotational speed of a motor so that the hall amplifier gain is changed in two steps, thus reducing torque ripple and noise.
• Motor drivable at voltage down to motor supply voltage 5V.

Applications
    The LB1687 is a 3-phase brushless motor driver IC ideally suited for use in VCR capstan motor, drum motor drive applications.