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