Trade Shows

26.02. - 28.02.2019, Nuremberg


Melexis launches the MLX91230, the first product of its third generation of current sensors. This digital solution brings 0.5% accuracy at an affordable price in a compact design. It integrates IVT measurement capability, embeds a microcontroller (MCU) to offload processing from the ECU and benefits from pre-installed safety features.


With a measurement of three physical quantities (current, voltage and temperature) and a dedicated 32 KB Flash memory on a single IC, this ASIL compliant product is ideal for safety applications. With its diagnostics the MLX91230 is removing an important part of the burden from the integrator in developing all the safety mechanisms. Boosting accuracy of Hall-effect DC current sensing, the MLX91230 comes with 0.5% accuracy over temperature (-40°C to 125°C) for a 1% lifetime drift all-in.

The MCU enables automatic gain control to cover higher dynamic ranges, and the on-board flash memory supports custom software and extensive compensation of system imperfections. Supplied with a regulated 5V or directly connected to the 12V battery, the MLX91230 in SOIC8 outputs measurements and diagnostics either on LIN bus or via UART.

Application examples:

Battery Terminal Sensor 12V/24V

Smart Battery Disconnect Unit, Junction Box or Power Relay Assembly

HV DC FastCharge current sensing

Battery Management System 48V/HV

Smart Pyrofuses

Zone controller

Enabling Battery State of Charge (SoC), State of Health (SoH) and State of Function (SoF)

Smart HV relays or contactors


Key features of the MLX91230:

IVT battery measurements:

- Hall and/or shunt based current sensor

- Internal (PTAT) temperature sensor

- Voltage measurement

     ▪ Internal dividers for 12V or 24V/48V battery

     ▪ External divider required for high voltage batteries

▪ Possible Automatic Gain Control (AGC) for higher dynamic range

16-bit MCU Memories: 

- 32 KB Flash 

- 128 B Flash Configuration Sector

- 20 KB ROM

- 2 KB RAM

- 512 B EEPROM 

Ambient temperature from -40°C to 125°C

ISO 26262 ASIL compliant SEooC (Safety Element out of Context)

LIN/UART communication 

- LIN Physical Layer compliant to ISO17987-4 and SAE J2602

- UART as CAN MCU bridge

- Wake-up on LIN and UART or on internal timer

▪ Supply voltage: 4.5 to 18V (12V battery supply capability)

▪ Low level SW libraries provided by Melexis

AEC-Q100 Grade 1 automotive qualified

Overcurrent detection functionality (<500μs)

Low current consumption (<21mA), programmable duty cycled sleep mode (RAM content maintained at <100µA)

▪ Magnetic sensing range of 512mT

▪ RoHS compliant package SOIC8 (DC)

▪ User programmable transfer characteristic

Martin Wesseling
Martin WesselingLine Management SenseThis email address is being protected from spambots. You need JavaScript enabled to view it.

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