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.

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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

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