MLX92231-AAA-xxx
3-Wire Hall Effect Switch
Features and Benefits Application Examples
Wide operating voltage range: from 2.7V to 24V Automotive, Consumer and Industrial
Accurate switching thresholds Solid-state switch
Reverse Supply Voltage Protection Brake sensor
Output Current Limit with Auto-Shutoff Clutch sensor
Under-Voltage Lockout Protection Sunroof/Tailgate opener
Thermal Protection Steering Column Lock
Traceability with integrated unique ID Open / Close detection
High ESD rating / Excellent EMC performance
Thin SOT23 3L Green Compliant package
Ordering Information
Part No. Temperature Code Package Code Comment
MLX92231LSE-AAA-xxx-RE L (-40C to 150C) SE (TSOT-3L) RE (Reel)
MLX92231LUA-AAA-xxx-BU L (-40C to 150C) UA (TO-92) BU (Bulk)
1 Functional Diagram
In addition to that an ID has been integrated on the IC
to have a complete traceability throughout the
VDD
process flow.
Voltage Regulator Under-
with Reverse Polarity Voltage
The included voltage regulator operates from 2.7 to
Protection Lockout
24V, hence covering a wide range of applications.
Temperature Bop/Brp Thermal
With the built-in reverse voltage protection, a serial
Compensation reference Protection
resistor or diode on the supply line is not required so
that even remote sensors can be specified for low
Switched OUT
Open-Drain voltage operation down to 2.7V while being reverse
Hall
Output
Plate
CDS
voltage tolerant.
Amplifier
In the event of a drop below the minimum supply
Current
Control Limit &
voltage during operation, the under-voltage lock-out
Auto-Shutoff
protection will automatically freeze the device,
preventing the electrical perturbation to affect the
GND
magnetic measurement circuitry. The output state is
therefore only updated based on a proper and
accurate magnetic measurement result.
2 General Description
The open drain output is fully protected against short-
The Melexis MLX92231 is a Hall-effect unipolar
circuit with a built-in current limit. An additional
switch designed in mixed signal CMOS technology.
automatic output shut-off is activated in case of a
prolonged short-circuit condition. A self-check is then
The device integrates a voltage regulator, Hall sensor
periodically performed to switch back to normal
with advanced offset cancellation system, automotive
operation if the short-circuit condition is released.
qualified EEPROM and an open-drain output driver,
The on-chip thermal protection also switches off the
all in a single package.
output if the junction temperature increases above an
abnormally high threshold. It will automatically
Based on the existing robust 922xx platform, the
recover once the temperature decreases below a
magnetic core has been equipped with a non-volatile
safe value.
memory that is used to accurately trim the switching
thresholds and define the needed output magnetic
characteristics (TC, Bop, Brp, Output pole
functionality).
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3-Wire Hall Effect Switch
Table of Contents
1 Functional Diagram ..................................................................................................................... 1
2 General Description .................................................................................................................... 1
3 Absolute Maximum Ratings ....................................................................................................... 3
4 General Electrical Specifications ............................................................................................... 4
5 Magnetic Specifications ............................................................................................................. 5
5.1 MLX92231LSE-AAA-004 ..................................................................................................................................... 5
5.2 MLX92231LSE-AAA-007 ..................................................................................................................................... 5
5.3 MLX92231LSE-AAA-009 ..................................................................................................................................... 5
5.4 MLX92231LSE-AAA-010 ..................................................................................................................................... 5
6 Magnetic Behaviour .................................................................................................................... 6
6.1 Latch sensor ....................................................................................................................................................... 6
7 Detailed General Description ..................................................................................................... 7
8 Latching Characteristic .............................................................................................................. 7
9 Application Information .............................................................................................................. 8
9.1 Typical Three-Wire Application Circuit .................................................................................................................. 8
9.2 Automotive and Harsh, Noisy Environments Three-Wire Circuit ............................................................................ 8
10 Standard information regarding manufacturability of Melexis products with different soldering
processes ....................................................................................................................................... 9
11 ESD Precautions ....................................................................................................................... 9
12 Package Information ............................................................................................................... 10
12.1 SE (TSOT-3L) Package Information ................................................................................................................. 10
12.2 UA (TO92-3L) Package Information ................................................................................................................ 11
13 Disclaimer ................................................................................................................................ 12
390109223101 REV 2 Page 2 of 12 Sept/14