Overview

The LB1997 is a three-phase brushless motor driver especially suited for CD-ROM spindle motor drives.

Functions

• Current linear drive

• Control V type amplifier

• Separate power supply for output upper side bias circuit allows low output saturation by boosting this power supply only (useful for 5V power supply types).

• Upper side current detection technique reduces loss voltage of current detection resistor. Voltage effect of this resistor reduces internal current drain of IC.

• Built-in short braking circuit

• Built-in reverse blocking circuit

• Hall FG output

• Built-in S/S function

• Built-in current limiter circuit

• Built-in Hall power supply

• Built-in thermal shutdown circuit

• V type control/single-side control switching pin allows CLV and CAV operation.