Ordering number : EN5978A
LB1997
Monolithic Digital IC
LB1997
Three-Phase Brushless Motor Driver for CD-ROM Spindle Drive
Overview
The LB1997 is a three-phase brushless motor driver especially suited for CD-ROM spindle motor drives.
Package Dimensions
unit: mm 3222-HSOP28
[LB1997]
28 15
Functions
5.
6
1.
0
0.
2
Allowable power dissipation, Pd max – W
• 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 i...