Description Suitable for a 3-phase BLDC (Brush-Less Direct Current) spindle motor driver with PWM, the monolithic FAN8741/FAN8742 IC also includes 2-ch motor drivers with PWM for sled motors and 4-ch linear drivers which drive the focus actuator, tracking actuator, tilt actuator, and loading motor in optical media applications. Designed specifically for high-speed/high-density optical media applications, the FAN8741/FAN8742’s power stage is created by D-MOS transistors which have extremely low RDSON. This enables less heat generation and guarantees improved reliability. Features Common • Built-in thermal shutdown circuit (TSD) • 8 Independent voltage sources • Corresponds to 3.3V or 5V DSP • 4 selectable mute inputs Spindle • Output PWM mode control • FG output: open collector type • Selectable brake(short & reverse brake) • Built-in hall bias • 180° commutation(compatible with conventional BLDC spindle motor) • Built in short-through protection function BTL(Sled 2-channels) • Output PWM mode control • Built in short-through protection function BTL(Other 4-channels) • Output linear mode control Typical Applications • CD-ROM • CD-RW • DVD-ROM • DVD-RAM • DVD Player (DVDP) • Other compact disk media • Game consoles
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