71812 SY/61610 SY 20100604-S00002 No.A1773-1/7

http://onsemi.com

Semiconductor Components Industries, LLC, 2013

May, 2013

LB11685VH

Overview

The LB11685VH is a three-phase full-wave current-linear-drive motor driver IC. It adopts a sensor less control system

without the use of a Hall Effect device. For quieter operation, the LB11685VH features a current soft switching circuit

and be optimal for driving the cooling fan motors used in refrigerators, etc.

Functions

• Three-phase full-wave linear drive (Hall sensor-less method)

• Built-in current limiter circuit

• Built-in three-phase output voltage control circuit

• Built-in motor lock protection circuit

• Motor lock protection detection output

• FG output made by back EMF

• Built-in thermal shut down circuit

• Beat lock prevention circuit

Specifications

Maximum Ratings at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

VCC max

19

V

Input applied voltage

VIN max

-0.3 to VCC +0.3

V

Maximum output current

IO max *1

1.2

A

Allowable power dissipation

Pd max

Mounted on a board *2

1.4

W

Operating temperature

Topr

-40 to 85

°C

Storage temperature

Tstg

-55 to 150

°C

Junction temperature

Tj max

150

°C

*1: The IO is a peak value of motor-current.

*2: Specified board: 76.1mm

× 114.3mm × 1.6mm, glass epoxy board.

Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time.

Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current,

high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.

Monolithic Digital IC

3-phase sensor less

Motor driver

Ordering number : ENA1773A

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.