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US90/91

24VHall IC Fan Driver

Features and Benefits

Power efficient CMOS and Power MOSFET technology

Built-in Zener diodes protection for the power outputs

One chip solution

SOIC-8 package

High sensitivity

Locked Rotor shutdown and auto-restart

Applications

Current Range up to 500mA Peak

For 12V/24V Fans

Ordering Information

Part No.

US90

US91

Temperature Suffix

E (-40擄C to 85擄C)

E (-40擄C to 85擄C)

Package Code

SO (8-Pin Narrow SOIC)

SO (8-Pin Narrow SOIC)

Functional Diagram

Description

US90: The Tachometer/Frequency Generator (FG)

version produces a logic signal, which is aligned with

the Hall plate signal.

US91: The Rotation Detector (RD) / Alarm Signal

version has a low output in the normal condition.

When a locked rotor condition occurs the RD output

changes to a high state.

MLX902xx Name of Sensor

3901090263

Rev Y.X

1

Page

22/Aug/98

Page 1

Oct/02

Rev. 003

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