Smart LIN pre-driver for DC and BLDC motors <500W (extended memory)

MLX81344

The MLX81344 is a gen-3 LIN pre-driver for DC & BLDC motors targeting automotive mechatronic applications up to 500 W.
MLX81340: standard memory (58 KB)
MLX81344: extended memory (90 KB)

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Top features

  • LIN Motor driver

    • 3x PreDriver for DC or BLDC motor

    • Up to 60nC NFETs (500W motors)

      • 300 mApk typ. charge current

      • 500 mApk 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:

      • MLX81340: 32 KB Flash with ECC

      • MLX81344: 64 KB Flash with ECC

      • 20 KB ROM

      • MLX81340: 2 KB RAM

      • MLX81344: 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 family in QFN24 or QFN32

    • MLX81340: 58KB Flash+ROM

    • MLX81344: 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 (MLX81344 only)

    • 5x 16-bit motor PWM timers

    • 2x 16-bit timers

    • 12-bit ADC with < 1.2μs conversion time with 29 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 32V* (*operating voltage up to 36V limited to 24h over lifetime)

    • 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 <500W (extended memory) - MLX81344

Product description

The MLX81344 is a gen-3 LIN pre-driver for motors targeting automotive mechatronic applications up to 500 W.

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 MLX81340 and MLX81344 (extended memory) pre-driver are well suited for

  • DC/BLDC HVAC Blowers, Fans, Pumps
  • DC/BLDC Valves, WindowLift, Seat, Sunroof...

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.

MLX81340 - MLX81344 - MLX81346 block diagram

Features and benefits

  • LIN Motor driver

    • 3x PreDriver for DC or BLDC motor

    • Up to 60nC NFETs (500W motors)

      • 300 mApk typ. charge current

      • 500 mApk 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:

      • MLX81340: 32 KB Flash with ECC

      • MLX81344: 64 KB Flash with ECC

      • 20 KB ROM

      • MLX81340: 2 KB RAM

      • MLX81344: 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 family in QFN24 or QFN32

    • MLX81340: 58KB Flash+ROM

    • MLX81344: 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 (MLX81344 only)

    • 5x 16-bit motor PWM timers

    • 2x 16-bit timers

    • 12-bit ADC with < 1.2μs conversion time with 29 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 32V* (*operating voltage up to 36V limited to 24h over lifetime)

    • 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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