Melexis has released its fourth-generation automotive LIN motor driver, the MLX81350, designed to support up to 5 W (0.5 A) per motor. The device is developed for applications such as air conditioning flaps and automated air vents used in electric vehicles, where precise control of airflow and thermal systems contributes to comfort and energy efficiency.
The IC is a 0.5 A smart LIN motor driver built on high-voltage silicon-on-insulator (SOI) technology. It integrates both analog and digital circuitry to deliver a compact single-chip solution that supports LIN 2.x/SAE J2602 and ISO 17987-4 standards for LIN slave nodes. This integration helps reduce bill-of-materials complexity while maintaining performance consistency and system reliability.
A key enhancement of this generation is the updated software architecture, which includes sensorless, closed-loop Field-Oriented Control (FOC) and improved stall detection. These features enable smoother motor operation, lower current consumption, and reduced acoustic noise, addressing the needs of vehicle HVAC systems and thermal management modules.
The MLX81350 maintains pin compatibility with previous generations, allowing for straightforward migration of existing designs. It includes a configurable RC clock operating between 24 MHz and 40 MHz, four general-purpose I/Os, a high-voltage input, UART, SPI and I²C master/slave interfaces, multiple PWM and general timers, and a 13-bit ADC with microsecond-level conversion speed. These peripherals provide engineers with flexible options for control and system integration.
Protection and diagnostic capabilities include safeguards against over-current, over-voltage, and over-temperature conditions, ensuring reliable operation under automotive requirements. The device supports operation from a 12 V supply with an input voltage range of 5.5 V to 28 V, and features low standby current consumption for energy efficiency. Wake-up options are available via LIN, external pins, or an internal timer.
Developed in alignment with ASIL B (ISO 26262) functional safety standards, the MLX81350 provides an adaptable and robust platform for motor control in EV air management systems. It combines power efficiency, reliability, and flexibility within a design optimized for compact, distributed automotive applications.
The device is now available through Melexis’ distribution network.
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