The MLX81346 is a gen-3 LIN pre-driver for 12 V, 24 V and 48 V DC & BLDC motors targeting automotive mechatronic applications up to 1000 W (12 V) or up to 2000 W (48 V). It benefits from an extended memory of 90 KB.

Read more

Top features

  • LIN Motor driver

    • 3x PreDriver for DC or BLDC motor

    • Up to 200nC NFETs (12 - 48 V supply)

      • 0.7 Apk typ. charge current

      • 1.5 Apk typ. discharge current

    • charge-pump for top-NFETs

    • VDS protection for all NFETs

  • Microcontroller

    • MLX16-FX, application CPU

    • MLX4, communication CPU

    • Programmable digital watch-dog

    • Interrupt controller

    • Common purpose timer

  • Memories split per CPU

    • MLX16-FX memories:

      • 64 KB Flash with ECC

      • 20 KB ROM

      • 4 KB RAM

      • 576 B EEPROM

    • MLX4 memories:

      • 6 KB ROM

      • 512B RAM

  • Fast end-of-line programming via LIN pin (64 KB Flash in < 4sec)

  • Pin-compatible Pre-driver family QFN32

    • MLX81346: 90KB Flash+ROM

  • Periphery

    • Configurable RC-clock 12...32MHz

    • 12x general purpose IO's, digital, analog, 3x high-voltage IO's, 2x UART, SPI, I2C-slave

    • 2x high-side supply <50mA

    • 5x 16-bit motor PWM timers

    • 2x 16-bit timers

    • 12-bit ADC with < 1.2μs conversion time with 64 channels

    • Differential current sense amplifier with 8-bit programmable overcurrent

    • Temperature sensor, over-temperature detection

    • Over-current detection, over-voltage and under-voltage protection

  • Voltage regulators

    • IC operating motor voltage VSM = 5.5V to 60V

    • Operating voltage VS = 5.5V to 32V* (*operating voltage up to 36V limited to 24h over lifetime)

    • Internal voltage regulators, directly powered from VS supply

    • Operation down to 3.5V with reduced analog characteristics, down to 3.0V without losing register content, down to 1.6V with intact RAM memory

    • Low standby current consumption of typ. 25μA in sleep mode

    • Wake-up possible via LIN, external pins or internal wake-up timer

  • Bus interface

    • LIN 2.x/SAE J2602 and ISO17987-4 compliant LIN slave

  • Automotive AEC-Q100 qualified

  • Designed for safety applications according to ASIL B (ISO 26262)

  • Maximum IC temperature (with validated mission profile) Tj = 175°C

Discover all features
Smart LIN pre-driver for DC and BLDC motors <2000W - MLX81346

Product description

The MLX81346 is a gen-3 LIN pre-driver for 12 V, 24 V and 48 V motors targeting automotive mechatronic applications up to 1000 W (12 V) or up to 2000 W (48 V). It benefits from an extended memory of 90 KB.

This all-in-one LIN pre-driver enables small-footprint applications to control DC and BLDC motors, and support sensored or sensorless field-oriented control (FOC) algorithms.

The MLX81346 pre-driver addresses multiple mechatronic applications:

  • 12V-48V DC/BLDC Engine Cooling Fans, Pumps, Compressors
  • 12V-48V DC/BLDC Positioning Actuators, including Robotics
  • 36V-48V BLDC e-bikes, e-scooters

For engineering development, the MLX universal master (MUM) can be used to program and interface the IC. For production, third-party equipment & SW must be used.

Contact your local representative for more information

MLX81346 IC Block diagram with external power bridge (BLDC)

Features and benefits

  • LIN Motor driver

    • 3x PreDriver for DC or BLDC motor

    • Up to 200nC NFETs (12 - 48 V supply)

      • 0.7 Apk typ. charge current

      • 1.5 Apk typ. discharge current

    • charge-pump for top-NFETs

    • VDS protection for all NFETs

  • Microcontroller

    • MLX16-FX, application CPU

    • MLX4, communication CPU

    • Programmable digital watch-dog

    • Interrupt controller

    • Common purpose timer

  • Memories split per CPU

    • MLX16-FX memories:

      • 64 KB Flash with ECC

      • 20 KB ROM

      • 4 KB RAM

      • 576 B EEPROM

    • MLX4 memories:

      • 6 KB ROM

      • 512B RAM

  • Fast end-of-line programming via LIN pin (64 KB Flash in < 4sec)

  • Pin-compatible Pre-driver family QFN32

    • MLX81346: 90KB Flash+ROM

  • Periphery

    • Configurable RC-clock 12...32MHz

    • 12x general purpose IO's, digital, analog, 3x high-voltage IO's, 2x UART, SPI, I2C-slave

    • 2x high-side supply <50mA

    • 5x 16-bit motor PWM timers

    • 2x 16-bit timers

    • 12-bit ADC with < 1.2μs conversion time with 64 channels

    • Differential current sense amplifier with 8-bit programmable overcurrent

    • Temperature sensor, over-temperature detection

    • Over-current detection, over-voltage and under-voltage protection

  • Voltage regulators

    • IC operating motor voltage VSM = 5.5V to 60V

    • Operating voltage VS = 5.5V to 32V* (*operating voltage up to 36V limited to 24h over lifetime)

    • Internal voltage regulators, directly powered from VS supply

    • Operation down to 3.5V with reduced analog characteristics, down to 3.0V without losing register content, down to 1.6V with intact RAM memory

    • Low standby current consumption of typ. 25μA in sleep mode

    • Wake-up possible via LIN, external pins or internal wake-up timer

  • Bus interface

    • LIN 2.x/SAE J2602 and ISO17987-4 compliant LIN slave

  • Automotive AEC-Q100 qualified

  • Designed for safety applications according to ASIL B (ISO 26262)

  • Maximum IC temperature (with validated mission profile) Tj = 175°C

Documents and tools

Product abstracts(s)
Product flyer(s)

Related tech talks

Automotive functional safety ISO 26262

Automotive functional safety ISO 26262

Within the increasing complexity of technologies in vehicles, the assurance of their proper functionality is becoming a major concern. Melexis follows the ISO 26262 to reduce the risks caused by systematic and random failures. Discover more about ASIL.
Read more
Position sensors for motor control feedback loop

Position sensors for motor control feedback loop

Electrical motors are complex systems. In this area there are motor drivers that can perfectly operate without a position sensor (sensorless). So why add extra component(s)?
Read more

Practical applications

thumbnail BEV thermal management

BEV thermal management

In order to optimize energy while increasing the All-Electric Range (AER), a perfect thermal management system is key. Ideal performance of the battery requires a temperature between 20-40℃, no matter the external conditions. Without the heat source of a classical ICE, new sources for heating & cooling need to be optimized. Discover the different modes.

Read more
thumbnail BEV thermal management

BEV thermal management - heat cabin

In order to optimize energy while increasing the All-Electric Range (AER), a perfect thermal management system is key. Ideal performance of the battery requires a temperature between 20-40℃, no matter the external conditions. Without the heat source of a classical ICE, new sources for heating & cooling need to be optimized. Discover the different modes.

Read more
thumbnail BEV thermal management

BEV thermal management - heat battery

In order to optimize energy while increasing the All-Electric Range (AER), a perfect thermal management system is key. Ideal performance of the battery requires a temperature between 20-40℃, no matter the external conditions. Without the heat source of a classical ICE, new sources for heating & cooling need to be optimized. Discover the different modes.

Read more
thumbnail BEV thermal management

BEV thermal management - cool cabin

In order to optimize energy while increasing the All-Electric Range (AER), a perfect thermal management system is key. Ideal performance of the battery requires a temperature between 20-40℃, no matter the external conditions. Without the heat source of a classical ICE, new sources for heating & cooling need to be optimized. Discover the different modes.

Read more
thumbnail BEV thermal management

BEV thermal management - cool battery

In order to optimize energy while increasing the All-Electric Range (AER), a perfect thermal management system is key. Ideal performance of the battery requires a temperature between 20-40℃, no matter the external conditions. Without the heat source of a classical ICE, new sources for heating & cooling need to be optimized. Discover the different modes.

Read more
Application - ICE gasoline thumbnail

ICE gasoline after treatment

We always need to save energy by all means, so ICE after treatment optimization is of no question. Efficiency and emission reduction are essential results of ICE after treatment.

Read more
Application - ICE gasoline thumbnail

ICE gasoline fuel management

Fuel management is under pressure. Fuel economy and performance are crucial to the ICE efficiency. Discover the products which support the optimization of fuel management.

Read more
Application - ICE gasoline thumbnail

ICE gasoline air management

Air is to an ICE what air is to the human body. Therefore it is essential to manage it efficiently, especially because it leads to better performances and less emissions.

Read more
application thermal management PHEV thumbnail

PHEV thermal management

In order to optimize energy while increasing the All-Electric Range (AER), a perfect thermal management system is key. Melexis products enable higher system integration towards a safer and cost-effective thermal management, maximizing the AER and improving the driver experience.

 

Read more