Overview

The LB1821M is a pre-driver IC that supports direct

PWM drive and is appropriate for the power brushless

motors used in office automation equipment. A motor

drive circuit with the desired output capability (voltage

and current characteristics) can be constructed by

attaching a driver array at the IC output. The LB1821M

includes on chip a speed control circuit that allows the

motor speed to be varied using an external clock.

Features

• Direct PWM drive output

• Speed discriminator + PLL speed control circuit

• FG and integrating amplifiers

• Forward/reverse switching circuit

• Braking circuit (short braking)

• Speed lock detection output

• Full complement of on-chip protection circuits,

including lock protection, current limiter, and

thermal shutdown protection circuits.

Package Dimensions

unit: mm

3148-QFP44MA

Monolithic Digital IC

Ordering number : EN5686

63097HA(OT) No. 5686-1/16

SANYO: QIP44MA

[LB1821M]

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

Power Brushless Motor Pre-Driver IC

for OA Equipment

LB1821M

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

9V

Maximum input current

10

mA

Output current

UL, UV, and WL outputs

30

mA

Allowable power dissipation

Pd max

0.9

W

Operating temperature

Topr

–20 to +80

°C

Storage temperature

Tstg

–55 to +150

°C

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Supply voltage

4.4 to 7.0

V

Input current range

1 to 5

mA

FG Schmitt output applied voltage

0 to 8

V

FG Schmitt output current

0 to 5

mA

Lock detection output current

0 to 20

mA

Allowable Operating Ranges at Ta = 25°C