Melexis MLX91230 Smart IVT Sensor ICs

Melexis MLX91230 Smart IVT Sensor ICs are smart Hall-based current sensors of a Gen 3 portfolio. The MLX91230 measures three physical quantities (current, voltage, and temperature) and a dedicated 32KB Flash memory. The devices are ASIL-compliant products, ideal for safety applications.

The Melexis MLX91230 Smart IVT Sensor ICs utilize diagnostics, removing an essential part of the burden from the integrator in developing all the safety mechanisms. The MLX91230 increases the precision of Hall-effect DC sensing, with a 0.5% accuracy over temperature (-40°C to +125°C) for a 1% lifetime drift all-in.

The MCU allows automatic gain control to cover higher dynamic ranges, while the onboard 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 the LIN bus or through UART.

Features

IVT battery measurements
- Hall-based current sensor
- Internal (PTAT) temperature sensor
- Voltage measurement
16-bit MCU memories
- 32KB Flash
- 128B Flash Configuration Sector
- 20KB ROM
- 2KB RAM
- 512B EEPROM
LIN/UART communication
- LIN Physical Layer compliant with ISO17987-4 and SAE J2602
- UART as CAN MCU bridge
- Wake up on LIN and UART or on an internal timer

Overcurrent detection functionality (<500μs)
Ambient temperature from -40°C to +125°C
Possible Automatic Gain Control (AGC) for higher dynamic range
Supply voltage from 4.5V to 18V (12V battery)
Low current consumption (<21mA), programmable duty cycled sleep mode (RAM content maintained at <100µA)
Magnetic range of 512mT
ISO 26262 ASIL compliant SEooC (Safety Element out of Context)
AEC-Q100 Grade 1 automotive qualified
Low-level SW libraries provided by Melexis
User programmable transfer characteristic
RoHS-compliant package SOIC8 (DC)

Applications

Battery terminal sensor 12V/24V
Battery management system 48V/HV
Enabling Battery State of Charge (SoC), State of Health (SoH) and State of Function (SoF)
Smart battery disconnect unit, junction box, or power relay assembly

Smart pyro fuses
Smart HV relays or contactors
HV DC Fast Charge current sensing
Zone controller

Melexis MLX91230 Smart IVT Sensor ICs

Features

Applications

Block Diagram

Functional Diagram

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