Document
MLX92231-AAA-xxx
3-Wire Hall Effect Switch Datasheet
1 Features and Benefits
Wide operating voltage range: from 2.7V to 24V Accurate switching thresholds Reverse Supply Voltage Protection Output Current Limit with Auto-Shutoff Under-Voltage Lockout Protection Thermal Protection Traceability with integrated unique ID High ESD rating / Excellent EMC performance
2 Application Examples
Automotive, Consumer and Industrial Solid-state switch Brake sensor Clutch sensor Sunroof/Tailgate opener Steering Column Lock Open/Close detection
3 Ordering Information
Product Code MLX92231 MLX92231 MLX92231
Temperature Code L L L
Package Code SE UA SE
Option Code AAA-0xx AAA-0xx AAA-2xx
Legend:
Temperature Code: Package Code: Option Code:
Packing Form: Ordering Example:
L (-40°C to 150°C) SE = TSOT-3L / UA = TO92-3L 0xx => 3 wire Hall Effect Switch 2xx => IMC version RE = Reel | BU=Bulk MLX92231LSE-AAA-001-RE
Packing from Code RE BU RE
Rev.007 – November 6, 2018 390109223101
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MLX92231-AAA-xxx
3-Wire Hall Effect Switch Datasheet
4 Functional Diagram
VDD
Voltage Regulator with Reverse Polarity
Protection
Temperature Compensation
Bop/Brp reference
UnderVoltage Lockout
Thermal Protection
Switched Hall Plate
CDS Amplifier
Open-Drain Output
OUT
Control
Current Limit & Auto-Shutoff
GND
5 General Description
The Melexis MLX92231 is a Hall-effect unipolar switch designed in mixed signal CMOS technology.
The device integrates a voltage regulator, Hall sensor with advanced offset cancellation system, automotive qualified EEPROM and an open-drain output driver, all in a single package.
Based on the existing robust 922xx platform, the magnetic core has been equipped with a non-volatile memory that is used to accurately trim the switching thresholds and define the needed output magnetic characteristics (TC, BOP, BRP, Output pole functionality).
In addition to that an ID has been integrated on the IC to have a complete traceability throughout the process flow.
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 the 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 state is therefore only updated based on a proper and accurate magnetic measurement result.
The chopper-stabilized amplifier uses switched capacitor techniques to suppress the offset generally observed with Hall sensors and amplifiers. The CMOS technology makes this advanced technique possible and contributes to smaller chip size and lower current consumption than bipolar technology. The sma.