MLX92241-BAA-xxx 2-Wire Hall Effect Switch Datasheet 1. Features and Benefits 2. Application Examples Wide operating voltage range: from 2.7V to Automotive, Consumer and Industrial 24V Brake light switch Integrated self-diagnostic functions activating Window lifter dedicated Safe Mode Door lock Reverse supply voltage protection Seatbelt buckle Under-Voltage Lockout protection Seat positioning Integrated capacitor for PCB less designs Transmission applications HW component Qualified according to Electrical power steering ISO26262-8:13 for use in safety critical systems. 3. Ordering Information Product Code Temperature Code Package Code Option Code Packing Form Code MLX92241 L UA BAA-0xx BU MLX92241 L SE BAA-0xx RE MLX92241 L UA BAA-1xx BU MLX92241 L SE BAA-2xx RE MLX92241 L UA BAA-3xx BU Legend: Temperature Code: L(-40C to 150C) Package Code: UA = TO92-3L SE = TSOT-3L Option Code: 0xx => Perpendicular sensitive 1xx => Integrated capacitor (UA package only) 2xx => IMC (SE package only) 3xx => Integrated capacitor and IMC (UA package only) Packing Form: BU = Bulk RE = Reel CA=Papertape in Ammopack CR=Papertape on Reel Ordering example: MLX92241LUA-BAA-1xx-BU Rev.013 September 2021 390109224108 Page 1 of 22 MLX92241-BAA-xxx 2-Wire Hall Effect Switch Datasheet 4. Functional Diagram VDD Voltage Regulator Under- with Reverse Polarity Voltage Protection Lockout TEST Temperature Bop/Brp Thermal Compensation reference Protection Switched Hall Output Plate CDS Current Sink Amplifier Control EEPROM GND 5. General Description The Melexis MLX92241 is based on the Melexis Hall-effect latest platform, 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 and integrated capacitor all in a single package. Based on the proven in use 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 pre-programmable temperature coefficient is implemented to compensate the natural behavior 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. The MLX92241 is delivered in a Green and RoHS compliant Plastic Single-in-Line (TO-92) for through-hole mount, or PCB-less design with integrated capacitor or in 3-pin Thin Small Outline Transistor (TSOT) for surface mount process. Rev.013 September 2021 390109224108 Page 2 of 22