Datasheet Summary
Ordering number : ENN6109A
Monolithic Digital IC
LB1987, 1987D, 1987M, 1987H
Three-Phase Brushless Motor Driver for VCR Capstan Motors
Overview
The LB1987, LB1987D, LB1987M, and LB1987H are optimal capstan motor drivers for use in VCR sets.
3147B-DIP28H
[LB1987D]
28 15
Functions
- Three-phase full-wave current-linear drive
- Torque ripple correction circuit (fixed correction ratio)
- Current limiter circuit with control characteristics gain switching
- Oversaturation prevention circuits for both the upper and lower sides of the output stage (No external capacitors are required.)
- FG amplifier
- Thermal shutdown circuit
R1.7
12.7 11.2
20.0...