D1708 MS / 21003AS (OT) / 52199RM (KI) No.6087-1/10

http://onsemi.com

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating

Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.

Semiconductor Components Industries, LLC, 2013

May, 2013

LB1975

Overview

The LB1975 is a 3-phase brushless motor driver IC suited for use in direct PWM driving of DC fan motors for air

conditioners, water heaters, and other similar equipment. Since a shunt regulator circuit is built in, single power supply

operation sharing the same power supply for the motor is supported.

Features

• Withstand voltage 46V, output current 2.5A

• Direct PWM drive output

• 3 built-in output top-side diodes

• Built-in current limiter

• Built-in FG output circuit

Specifications

Absolute Maximum Ratings at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

VCC max

7V

Supply voltage

VM max

46

V

Output current

IO max

2.5

A

Maximum input current

IREG max

VREG pin

10

mA

Pd max1

Independent IC

3

W

Allowable power dissipation

Pd max2

With infinite hear sink

20

W

Operating temperature

Topr

-20 to +100

°C

Storage temperature

Tstg

-55 to +150

°C

Monolithic Digital IC

For Fan Motor

3-phase Brushless Motor Driver

Ordering number : EN6087B