Description
HA13565F is a 3-phase brushless DC motor driver IC with digital speed control. It is developed for direct drive of the spindle motor of 5V floppy disk drives. It has the following functions and features.

FEATUREs
• Low saturation voltage 0.5V Typ (at 0.7A)
• Soft switching drive circuit
• Small surface mount package

Functions
• 3 sensor 1.0A/phase, 3-phase drive circuit
• Digital speed control circuit
• Sensorless index circuit
• Current limiter circuit
• Over-temperature shutdown circuit (OTSD)
• Circuit for switching between 300 and 360rpm speeds