Melexis MLX81334 Smart LIN Motor Driver

Melexis MLX81334 Smart LIN Motor Driver is a gen-3, 1A-rated LIN driver that optimizes electric vehicle (EV) thermal valves (accurate battery temperature control) and expansion valves (heat pump refrigeration loop). This results in a longer range for EVs. This all-in-one module enables small-footprint applications up to 10W to control small BLDC, stepper, and DC motors, utilizing sensor or sensorless field-oriented control (FOC) algorithms. The 64KB on-chip memory offers ample capacity for the use of sophisticated software. Melexis MLX81334 Smart LIN Motor Driver comes in a 5mm x 5mm 32-pin QFN package. Protections include overtemperature, overcurrent, overvoltage, and undervoltage. The MLX81334 is AEC-Q100 qualified and RoHS compliant.

Features

Motor driver
- Driver for DC / BLDC / stepper motor
- R_on=0.8Ω typical for 1 half-bridge + shunt
- 2x NFET for each half-bridge
- On-chip charge-pump for top-NFETs
- V_ds protection for all NFETs
Microcontroller
- MLX16-FX, application CPU
- MLX4, communication CPU
- 2x watchdog
- +50 input interrupt controller
- Common purpose timer
Memories split per CPU
- MLX16-FX memories
  - 64KB flash with ECC
  - 10KB ROM
  - 4KB RAM
  - 512B EEPROM
- MLX4 memories
  - 6KB ROM
  - 512B RAM
Function-compatible with MLX81332 (32KB flash)
Small QFN32 5mm x 5mm package
Automotive AEC-Q100 qualified
Designed for safety applications according to ASIL-B (ISO 26262)
Maximum IC temperature (with validated mission profile) Tj = +175°C

Periphery
- Configurable RC-clock
- 8x general purpose IOs, digital, analog, 1x high-voltage input, SPI, I²C-slave, UART
- 5x 16-bit motor PWM timers
- 2x 16-bit timers
- 10-bit ADC with <6µs conversion time with multiple channels and different ADC references
- Differential current sense amplifier
- Temperature sensor, overtemperature detection
- Overcurrent detection, overvoltage, and undervoltage protection
Voltage regulators
- Internal voltage regulators, directly powered from 12V battery supply
- 5.5V to 20V operating voltage
- 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 typical 25µA (max 50µA) 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 secondary
RoHS compliant