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