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

MLX81332

The MLX81332 is a gen-3 LIN driver for small motors targeting automotive mechatronic applications at up to 10 W
MLX81330: LIN motor driver IC < 0.5 A
MLX81332: LIN motor driver IC < 1 A

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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:

      • 32 KB Flash with ECC

      • 10 KB ROM

      • 2 KB RAM

      • 512 B EEPROM

    • MLX4 memories:

      • 6 KB ROM

      • 512 B RAM

  • Pin-compatible drivers in SO8 and QFN24

    • MLX81330 < 0.5A

    • MLX81332 < 1A

  • 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 IC for DC, Stepper and BLDC motors (1A) - MLX81332

Product description

The MLX81332 is a gen-3 LIN driver for small motors targeting automotive mechatronic applications at 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 MLX81332 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

 

 

 

 

 

 

 

MLX81332 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:

      • 32 KB Flash with ECC

      • 10 KB ROM

      • 2 KB RAM

      • 512 B EEPROM

    • MLX4 memories:

      • 6 KB ROM

      • 512 B RAM

  • Pin-compatible drivers in SO8 and QFN24

    • MLX81330 < 0.5A

    • MLX81332 < 1A

  • 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

Practical applications

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.

 

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application Main DCDC thumbnail

main DCDC

The DC/DC converter produces low voltage DC electricity (e.g. 12 V, 14 V, 24 V) from the high voltage battery (e.g. 48 V up to 800 V) to supply the boardnet and charge the low voltage battery.

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