Dual core motor driver boosts EV range ...
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Dual core motor driver boosts EV range ...

Aug 24, 2023

The LIN-based MLX81334 motor driver is built on a silicon on insulator (SOI) CMOS process and supports thermal valves for accurate battery temperature control and expansion valves for heat pump refrigeration loop to enable longer range for EVs.

The MLX81334 is a 1A-rated single chip motor driver to drive small DC, BLDC or stepper motors. Each IC has an embedded microcontroller with a 16-bit application processor and a separate communications processor, four FET half-bridge drivers, data conversion circuitry, plus LIN or serial interfaces.

The 64 KB on-chip memory of the MLX81334 (versus 32 KB for the MLX81332) provides ample capacity for use of sophisticated software – so more safety diagnostics can be incorporated, as well as essential calibration data. Additionally the MLX81334 supports OTA updates.

The SOI process combines industry-leading operational robustness with elevated levels of functional integration in a 5mm x 5mm 32-pin QFN packages. They are suitable for use in 12V and 24V automotive systems. Over-temperature, over-current, over-voltage and under-voltage protection functions are all included.

“The latest generation of vehicle mechatronics requires high-power driving hardware with very little PCB footprint. Through our new single-chip driver, we enable more compact thermal valve electronics for electric vehicles,” said Marc Lambrechts, Product Line Manager Embedded Motor Drivers at Melexis. “By keeping the bill-of-material down and the price/performance attractive, our automotive customers can develop competitive thermal management systems. Furthermore, technical support by our experienced engineers helps in achieving first-time right designs.”