3-Phase Brushless Motor Driver for

CD-ROM Spindle Motors

Overview

The LB1895 and LB1895D are 3-phase brushless motor drivers

for use in CD-ROM spindle motors.

Functions and Features

.

Current linear drive

.

V-type control amplifier built in

.

Because the power supply for the bias circuit on the upper

output side is separate, output with low saturation can be

attained by boosting only that power supply. (Effective when

.

Because current is detected on the upper side, there is no

voltage loss due to the RF resistance. In addition, the RF

voltage reduces the power dissipation within the IC.

.

Start/Stop function built in

.

Thermal shutdown circuit built in

.

Overcurrent protection circuit built in

.

Two-channel Hall signal comparator built in.

(For detecting rotation direction and Hall FG output)

.

Hall device bias built in

Package Dimensions

unit : mm

3222-HSOP28

[LB1895]

114

0.3

0.8

15

28

2.7

15.2

0.8

0.2

SANYO : HSOP28

unit : mm

3196-DIP30SD

[LB1895D]

SANYO : DIP30SD

Ordering number: EN5634

Monolithic Digital IC

LB1895, 1895D

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

4097HA(II) No.5634-1/12