Overview

The LB1825 is a three-phase brushless motor driver IC

optimal for LBP polygon mirror and magneto-optical disk

spindle motor drive.

Functions and Features

• Three-phase full-wave current control drive

• PLL speed control

• Internal 24-mode clock divisor switching

• Phase lock detector output

• FG/Hall FG selection

• Current limiter circuit

• 7 V stabilized power supply output pin

• Reverse torque braking

• Crystal oscillator circuit

• Internal/external reference frequency selection

• Built-in FG amplifier and FG pulse output

• Forward/reverse rotation switching

• Low power supply voltage protection circuit

• Thermal protection circuit

Package Dimensions

unit: mm

3147A-DIP28H

Monolithic Digital IC

Ordering number : EN4845B

83097HA (OT)/N3095HA (OT)/91494TH (OT) No. 4845-1/9

SANYO: DIP28H

[LB1825]

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

Three-Phase Brushless Motor Driver

LB1825

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

30

V

Maximum output current

t < 0.1 s

2.0

A

Allowable power dissipation

Pd max1

Independent IC

3

W

Pd max2

With an arbitrarily large heat sink

20

W

Operating temperature

Topr

–20 to +80

°C

Storage temperature

Tstg

–55 to +150

°C