Melexis Motor Driver MLX81334 Boosts New Functions for EVs Premiumization

时间： 2023-07-04 来源：MELEXIS News

技术问答

Tessenderlo, Belgium, 29 June 2023 – MELEXIS introduces the MLX81334, a motor driver designed to optimize electric vehicles' thermal valves (accurate battery temperature control) and expansion valves (heat pump refrigeration loop). This enables a longer range for EVs. The MLX81334 complements Melexis embedded motor drivers portfolio with extended memories and OTA (over-the-air) support for premium software features.

The LIN-based MLX81334 is a 1A-rated motor driver intended for deployment in mechatronic thermal management systems. This single-chip device efficiently drives 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 64KB on-chip memory of the MLX81334 (versus 32KB for the MLX81332) provides ample capacity for the use of sophisticated software - so more safety diagnostics can be incorporated, as well as essential calibration data. Additionally, the MLX81334 supports OTA updates.

The driver benefits from Melexis’ engineering expertise in high-voltage silicon-on-isolator (SOI) technology. As a result, it combines industry-leading operational robustness with elevated levels of functional integration. Attaining high-power operation in a streamlined form factor, the device takes up only minimal board area. This allows implementation into even the most space-constrained of mechatronic deployments.

Melexis’ MLX81334 drivers are supplied in 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,” Marc Lambrechts, Product Line Manager of Embedded Motor Drivers at Melexis, explains. “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.”

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