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Car BLDC motor drivers boast LIN-ready single chip sol'n

08 May 2012

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Melexis Microelectronic Integrated Systems N.V. has revealed its next generation IC portfolio for sensorless and sensor based BLDC motor control for automotive applications. According to the company, the driver ICs combine voltage regulator, LIN-transceiver, MCU, EEPROM, flash, RAM, power FET pre-driver and several dedicated circuit blocks for highly efficient BLDC motor control from a single IC.

The IC family consists of four base family members—MLX81205, MLX81207, MLX81210 and MLX81215. Each is available in different memory configurations and in different package options. The IC family is 45V load dump protected and will be qualified according AEC-Q100 Grade 0 for high temperature automotive application support.

The MLX81205/07/10/15 are single die per package solutions (SoC). This brings customers a minimal BOM by reducing IC and system costs, noted Melexis.

The company indicated that the IC family supports the Melexis patented TruSense sensorless driving algorithms in HW and SW for starting and driving BLDC motors in different constructions in a reliable way under unknown load conditions for a high dynamic range in speed. Different current wave form profiles (block, trapezoidal, sinusoidal) can be applied for optimal and energy efficient motor performance.

Melexis also revealed on this IC family a solution for slope control on power transistor switching, allowing customers to optimize in software the EMC behavior, as well as thermal dissipation of the power transistors during the switching process.

The IC family targets permanent running BLDC motors typically found in various automotive applications. Examples include fuel pumps, water pumps, oil pumps, engine cooling fans, HVAC blowers and battery cooling fans where high energy efficiency and low system cost are in focus.

The first family member, the MLX81215 in QFN48 7x7 with software development setups, is available for alpha customers. Next family members and a general availability for developments at customers are planned to be ready in the next months.




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