All-in-one LIN motor driver cuts material costs

December 01, 2020 //By Christoph Hammerschmidt
All-in-one LIN motor driver cuts material costs
Chipmaker Melexis has developed the third generation of LIN drivers for small motors, targeting automotive mechatronic applications at up to 10 W. The device reduces BoM and simplifies design of motor-controlled flaps, valves, small fans and pumps – and according to the vendor it is “the smartest-ever fully integrated LIN driver.”

Melexis’ Gen 3 MLX81330 (0.5 A motor drive) and MLX81332 (1.0 A motor drive) LIN drivers are based on high-voltage SOI (Silicon On Insulator) technology to deliver the required high levels of robustness and function density, combining analog and digital circuitry to create true single-chip solutions that are compliant with the industry standard LIN 2.x/SAE J2602 and ISO 17987-4 specifications for LIN slave nodes.

Along with an integrated motor driver, they feature extensive I/O capability and a dual-core microcontroller architecture. One core is dedicated to communications while the second microcontroller runs the application software.

With their ‘all-in-one’ approach to LIN slave design, the MLX81330 and MLX81332 enable a reduced Bill of Materials (BoM), smaller PCB, simpler product design and faster assembly, promises Melexis. For example, the MLX81332 interfaces directly with an ECU and can drive up to four phases of a motor, with a maximum current of 1 A per phase, or two phases with a maximum current of 1.4 A. This means it can drive a 2-wire DC motor, 3-wire BLDC motor or 4-wire bipolar stepper motor, using either sensored or sensorless field-oriented control (FOC) algorithms.

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