92706 / 21306 MS OT 20051228-S00001 No.A0287-1/24

http://onsemi.com

Semiconductor Components Industries, LLC, 2013

May, 2013

LB11693H

Overview

The LB11693H reduces motor noise by imparting a slope to the output current when switching the phase to which

power

is applied. This motor driver includes an automatic recovery constraint protection circuit and is optimal for driving 24V

fan motors.

Functions

• Soft phase switching + direct PWM drive

• PWM control based on both a DC voltage input (the CTL voltage) and a pulse input

• Provides a 5 V regulator output

• One Hall-effect sensor FG output

• Integrating amplifier

• Automatic recovery constraint protection circuit (on/off = 1/14), RD output

• Current limiter circuit

• LVSD circuit

• Thermal protection circuit

Specifications

Absolute Maximum Ratings at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Supply voltage range

VCC max

30

V

Output current

IO max

T

≤ 500mS

1.8

A

Allowable power dissipation 1

Pd max1

Independent IC

0.9

W

Allowable power dissipation 2

Pd max2

When mounted on a circuit board *

2.1

W

Operating temperature

Topr

-30 to +100

°C

Storage temperature

Tstg

-55 to +150

°C

*: On the specified circuit board (114.3mm

×76.1mm×1.6mm, glass epoxy)

Allowable Operating Ranges at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Supply voltage rang

VCC

9.5 to 28

V

Constant voltage output current

IREG

0 to -30

mA

RD output current

IRD

0 to 10

mA

FG output current

IFG

0 to 10

mA

Ordering number : ENA0287

Monolithic Digital IC

3-Phase Brushless Motor Driver

for 24V Fan Motors

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.