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MLX92241LUA-AAA-006 Datasheet(PDF) 1 Page - Melexis Microelectronic Systems

Part # MLX92241LUA-AAA-006
Description  2-Wire Hall Effect Switch
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Manufacturer  MELEXIS [Melexis Microelectronic Systems]
Direct Link  http://www.melexis.com
Logo MELEXIS - Melexis Microelectronic Systems

MLX92241LUA-AAA-006 Datasheet(HTML) 1 Page - Melexis Microelectronic Systems

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MLX92241LUA-AAA-006
2-Wire Hall Effect Switch
390109224106 Rev. 1
Page 1 of 11
March/12
Features and Benefits
 Wide operating voltage range: from 2.7V to 24V
 Very wide range for magnetic sensitivity
 Chopper-stabilized amplifier stage
 Programmable Built-in negative temperature coefficient
 Reverse Supply Voltage Protection
 Under-Voltage Lockout Protection
 Thermal Protection
 High ESD rating / Excellent EMC performance
Application Examples
 Automotive, Consumer and Industrial
 Wiper motor
 Window lifter
 Doorlock
 Seatbelt buckle
 Seat positioning
 Sunroof/Tailgate opener
 Electrical power steering
Ordering Information
Part No.
Temperature Code
Package Code
Comment
MLX92241LUA-AAA-006-BU
L (-40°C to 150°C)
UA (TO92-3L)
BU (Bulk) - AHNS
1 Functional Diagram
VDD
GND
Output
Current Sink
Control
Voltage Regulator
with Reverse Polarity
Protection
CDS
Amplifier
Switched
Hall
Plate
Trimming
Register
Under-
Voltage
Lockout
Thermal
Protection
Bop/Brp
reference
Temperature
Compensation
TEST
2 General Description
The Melexis MLX92241 is the new generation Hall-
effect switch designed in mixed signal submicron
CMOS technology.
The device integrates a voltage regulator, Hall sensor
with advanced offset cancellation system and a current
sink-configured output driver, all in a single package.
Based on a brand new platform, the magnetic core is
using an improved offset cancellation system allowing
faster and more accurate processing while being
temperature insensitive and stress independent. In
addition a temperature coefficient is implemented to
compensate the natural behaviour of certain types of
magnets becoming weaker with rise in temperature.
The included voltage regulator operates from 2.7 to
24V, hence covering a wide range of applications. With
the built-in reverse voltage protection, a serial resistor
or diode on the supply line is not required so that even
remote sensors can be specified for low voltage
operation down to 2.7V while being reverse voltage
tolerant.
In an event of a drop below the minimum supply voltage
during operation, the under-voltage lock-out protection
will automatically freeze the device, preventing the
electrical
perturbation
to
affect
the
magnetic
measurement circuitry. The output current state is
therefore only updated based on a proper and accurate
magnetic measurement result.
The two-wire interface not only saves one wire, but also
allows
implementation
of
diagnostic
functions
as
reverse polarity connection and malfunction detection.
The on-chip thermal protection also switches off the
output if the junction temperature increases above an
abnormally high threshold. It will automatically recover
once the temperature decreases below a safe value.
With switching magnetic characteristics the supply
current state is turned high by a sufficiently strong
South Pole facing the package branded side. Toggling
the state of the supply current from high to low is
possible by applying low or no magnetic field.
The MLX92241 is delivered in a Green and RoHS
compliant Plastic Single-in-Line (TO-92 flat) for through-
hole mount or PCB-less design or in 3-pin Thin Small
Outline Transistor (TSOT) for surfacemount process


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