Smart LIN driver for DC, Stepper and BLDC motors (1 A) (extended memory)

MLX81334

The MLX81334 is a LIN driver for motors targeting automotive mechatronic applications up to 10 W.
MLX81330: LIN motor driver < 0.5 A
MLX81332: LIN motor driver < 1 A
MLX81334: LIN motor driver < 1 A extra memory

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Top features

  • Motor driver

    • Driver for DC/BLDC/Stepper motor

    • Ron=0.8Ω typ. for 1 half-bridge + shunt

    • 2x NFET for each half-bridge

    • on-chip charge-pump for top-NFETs

    • Vds protection for all NFETs

  • Microcontroller:

    • MLX16-FX, application CPU

    • MLX4, communication CPU

    • 2x watch-dog

    • +50 input interrupt controller

    • Common purpose timer

  • Memories split per CPU

    • MLX16-FX memories:

      • 64 KB Flash with ECC

      • 10 KB ROM

      • 4 KB RAM

      • 512 B EEPROM

    • MLX4 memories:

      • 6 KB ROM

      • 512 B RAM

  • Function compatible with the MLX81332 (32 KB Flash)

  • Small QFN32, 5x5 package RoHS compliant

  • Periphery

    • Configurable RC-clock 12..32 MHz

    • 8x general purpose IO’s, digital, analog, 1x high-voltage input, SPI, I2C-slave, UART

    • 5x 16-bit motor PWM timers

    • 2x 16-bit timers

    • 10-bit ADC with < 6 µs conversion time with multiple channels and different ADC references

    • Differential current sense amplifier

    • Temperature sensor, over-temperature detection

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

  • Voltage regulators

    • Internal voltage regulators, directly powered from 12V battery supply

    • Operating voltage Vs = 5.5V to 20V

    • Operation down to 3.5V with reduced analog characteristics, down to 3V without losing register content, down to 1.5V with intact RAM memory

    • Low standby current consumption of typ 25µA (max 50 µA) 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 driver for DC, Stepper and BLDC motors (1 A) (extended memory) - MLX81334

Product description

The MLX81334 is a gen-3 LIN driver for small motors targeting automotive mechatronic applications up to 10 W. This all-in-one LIN driver enables small-footprint applications to control small BLDC, stepper and DC motors, using either sensored or sensorless field-oriented control (FOC) algorithms. The 64 KB on-chip memory of the MLX81334 (versus 32 KB for the MLX81332) provides ample capacity for use of sophisticated software.

The MLX81334 is well suited for
- small Stepper / BLDC flap or valve, < 1 Apk per phase
- small DC flap / valve, or single-coil fan/pump, < 1.4 Apk

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

MLX81330 - MLX81332 - MLX81334 block diagram

Features and benefits

  • Motor driver

    • Driver for DC/BLDC/Stepper motor

    • Ron=0.8Ω typ. for 1 half-bridge + shunt

    • 2x NFET for each half-bridge

    • on-chip charge-pump for top-NFETs

    • Vds protection for all NFETs

  • Microcontroller:

    • MLX16-FX, application CPU

    • MLX4, communication CPU

    • 2x watch-dog

    • +50 input interrupt controller

    • Common purpose timer

  • Memories split per CPU

    • MLX16-FX memories:

      • 64 KB Flash with ECC

      • 10 KB ROM

      • 4 KB RAM

      • 512 B EEPROM

    • MLX4 memories:

      • 6 KB ROM

      • 512 B RAM

  • Function compatible with the MLX81332 (32 KB Flash)

  • Small QFN32, 5x5 package RoHS compliant

  • Periphery

    • Configurable RC-clock 12..32 MHz

    • 8x general purpose IO’s, digital, analog, 1x high-voltage input, SPI, I2C-slave, UART

    • 5x 16-bit motor PWM timers

    • 2x 16-bit timers

    • 10-bit ADC with < 6 µs conversion time with multiple channels and different ADC references

    • Differential current sense amplifier

    • Temperature sensor, over-temperature detection

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

  • Voltage regulators

    • Internal voltage regulators, directly powered from 12V battery supply

    • Operating voltage Vs = 5.5V to 20V

    • Operation down to 3.5V with reduced analog characteristics, down to 3V without losing register content, down to 1.5V with intact RAM memory

    • Low standby current consumption of typ 25µA (max 50 µA) 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

Videos

Embedded LIN drivers and pre-drivers for stepper, DC and BLDC motors

Product

Discover Melexis 3rd generation of embedded motor drivers for DC, BLDC and Stepper motors. It includes LIN drivers (<10 W) and LIN pre-drivers (<2000 W).