Overview
The LB1998 is a three-phase brushless motor driver especially suited for CD-ROM spindle motor drives.
   
Functions
• Current linear drive
• Control V type amplifier
• Top side current detection technique reduces loss
    voltage of current detection resistor. Voltage effect of
    this resistor reduces internal current drain of IC.
• Built-in current limiter circuit
• Built-in reverse blocking circuit
• Hall FG output
• Built-in 1 Hall FG/3 Hall FG switching circuit
• Built-in short braking circuit
• Built-in Hall bias cicuit
• Built-in thermal shutdown circuit
• Built-in S/S function
• Built-in 3 mode gain switching function ensures
    compatibility with 8/12 cm CAV and CLV discs