Smart IVT current sensor IC with +/-0.5% accuracy over temperature
MLX91230 Melexis
The MLX91230 senses DC current. It integrates IVT measurement capability, embeds a microcontroller and supports safety applications. It is ideal for EV battery management and power distribution systems.
Top features
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IVT battery measurements
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Hall and/or shunt based current sensor
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Internal (PTAT) temperature sensor
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Voltage measurement
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Internal dividers for 12V or 24V/48V battery
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External divider required for high voltage batteries
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16-bit MCU Memories
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32 KB Flash
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128 B Flash configuration sector
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20 KB ROM
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2 KB RAM
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512 B EEPROM
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LIN/UART communication
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LIN Physical Layer compliant to ISO17987-4 and SAE J2602
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UART as CAN MCU bridge
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Wake-up on LIN and UART or on internal timer
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Overcurrent detection functionality (<500μs)
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Possible Automatic Gain Control (AGC) for higher dynamic range
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Ambient temperature from -40°C to 125°C
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Supply voltage: 4.5 to 18V (12V battery supply capability)
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Low current consumption (<21mA), programmable duty cycled sleep mode (RAM content maintained at <100µA)
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Magnetic range of 512mT
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ISO 26262 ASIL compliant SEooC (Safety Element out of Context)
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AEC-Q100 Grade 1 automotive qualified
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Low level SW libraries provided by Melexis
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User programmable transfer characteristic
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RoHS compliant package SOIC8 (DC)
Smart IVT current sensor IC with +/-0.5% accuracy over temperature - MLX91230
Product description
The MLX91230 is the first smart Hall-based current sensor and is part of Melexis Gen 3 portfolio. 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. That includes an on-chip overcurrent detection.
As battery metrics such as State of Charge (SoC), State of Health (SoH) and State of Function (SoF) are directly linked to EV range, high current sensing accuracy is a key factor in these calculations. The MLX91230 comes with +/-0.5% accuracy over temperature (-40℃ to 125℃) 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 deployment and extensive compensation of system imperfections. Supplied with a regulated 5V or directly connected to the 12V battery, the MLX91230 in SOCI8 provides measurements and diagnostics either on a LIN bus or via UART.
For engineering development the following tools are available:
- DVK91230: development kit to get started
- Melexis Universal Master (MUM): to program and interface the IC.
Contact your local representative for more information.
Applications:
Hall based primary and redundant current measurement (homogenous or heterogenous sensing technology):
- 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 Pyrofuses
- Smart HV relays or contactors
- HV DC FastCharge current sensing
- Zone controller
Features and benefits
-
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
-
-
-
16-bit MCU Memories
-
32 KB Flash
-
128 B Flash configuration sector
-
20 KB ROM
-
2 KB RAM
-
512 B EEPROM
-
-
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
-
-
Overcurrent detection functionality (<500μs)
-
Possible Automatic Gain Control (AGC) for higher dynamic range
-
Ambient temperature from -40°C to 125°C
-
Supply voltage: 4.5 to 18V (12V battery supply capability)
-
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)
Documents and tools
Datasheet(s)
Product flyer(s)
Selection guide(s)
IC handling and assembly
Videos
IC platform for DC current sensing (Shunt & Hall)
Discover the MLX91230 (Hall) and MLX91231 (Shunt), DC current solution with high accuracy. They integrate IVT measurement capability, embed a microcontroller (MCU) and benefit from pre-installed safety features. The MLX91230 & MLX91231 are perfect for EV battery management and power distribution systems.
