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MLX91230
The MLX91230 is the first smart Hall-based current sensor of a 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. 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.
HALL-BASED DC CURRENT SENSING WITH
UNPRECEDENTED ACCURACY
KEY FEATURES
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IVT baery measurements:
• Hall-based current sensor
• Internal (PTAT) temperature sensor
• Voltage measurement
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16-bit MCU Memories:
• 32 KB Flash
• 128 B Flash Conguraon Sector
• 20 KB ROM
• 2 KB RAM
• 512 B EEPROM
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LIN/UART communicaon
• LIN Physical Layer compliant to ISO17987-4
and SAE J2602
• UART as CAN MCU bridge
• Wake-up on LIN and UART or on internal mer
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Overcurrent detecon funconality (<500μs)
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Ambient temperature from -40°C to 125°C
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Possible Automac Gain Control (AGC) for higher
dynamic range
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Supply voltage: 4.5 to 18V (12V baery)
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Low current consumpon (<21mA),
programmable duty cycled sleep mode (RAM
content maintained at <100µA)
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Magnec 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 automove qualied
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Low level SW libraries provided by Melexis
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User programmable transfer characterisc
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RoHS compliant package SOIC8 (DC)
MLX91230
The snout of the platypus is a sensory
organ with electroreceptors in the skin
of the bill, which allow him to detect the
electrical eld that gets generated when
his prey contracts its muscles. With his
40,000 sensive electronic sensors, this
unique semi aquac egg-laying mammal
represents our current sensors.
SMART IVT
BATTERY SENSOR
BLOCK DIAGRAM
Hall based primary and redundant current measurement (homogenous or heterogenous sensing technology):
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Baery Terminal Sensor 12V/24V
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Baery Management System 48V/HV
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Enabling Baery State of Charge (SoC), State of
Health (SoH) and State of Funcon (SoF)
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Smart Baery Disconnect Unit, Juncon Box or
Power Relay Assembly
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Smart Pyrofuses
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Smart HV relays or contactors
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HV DC FastCharge current sensing
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Zone controller
APPLICATIONS
IC PLATFORM FOR
EV BATTERY
CURRENT SENSING
Output
LIN
UART
OCD
16-bit ADC
Safety mechanism
Voltage
Temperature
Diagnoscs
Over Current
Detecon
Current
Voltage regulator
V
SENSE
Flash | ROM
Automac Gain
Control (AGC)
MLX16
16-bit MCU
5V
12V
12V/24V/48V
400V/800V
External divider & insulaon
required for high voltage baeries
Internal dividers included for
12V or 24V/48V baeries
The above informaon is “as is” and believed to be correct and accurate. Melexis disclaims any and all liability in connecon with or arising out of the furnishing, applicaon or use of the informaon or products; any and all liability, including without limitaon, special, consequenal or incidental
damages; and any and all warranes, express, statutory, implied, or by descripon, including warranes of tness for parcular purpose, non-infringement and merchantability. Melexis reserves the right to change it at any me and without noce. Users should obtain the latest version of the
informaon to verify it is current. Users must further determine the suitability of a product for its applicaon, including the level of reliability required and determine whether it is t for a parcular purpose. Export control regulaons may apply and export might require a prior authorizaon from
competent authories. Melexis’ products are intended for use in normal commercial applicaons. Unless otherwise agreed upon in wring, the products are not designed, authorized or warranted to be suitable in applicaons requiring extended temperature range and/or unusual environmental
requirements. High reliability applicaons, such as medical life-support or life-sustaining equipment are specically not recommended by Melexis. Melexis’ products are sold under the Melexis’ Terms of Sale, which can be found at hps://www.melexis.com/en/legal/terms-and-condions.
V1/09.2023