Melexis all-in-one LIN driver propels relay window lifters

Melexis has unveiled a new LIN pre-driver IC for relay DC motors that offers a combination of high power and greater compactness.

The MLX81160 is the latest addition to the company’s Gen3 family of compatible embedded motor drivers. Its 48 KB of memory (16 KB ROM for the included LIN protocol and 32 KB Flash for the application software) is suitable for applications like window regulators.

By leveraging high-voltage silicon-on-isolator (SOI) technology, this LIN-based pre-driver exhibits operational robustness for 12 and 24 V applications.

This device is the successor to the company’s widely implemented MLX81150 LIN slave device for relay and DC motor control. The key uses are window lifters and sunroof regulators with relay DC motors, as well as small DC motor applications with external PN-MOSFET power regulation.

AEC-Q100 qualified, the MLX81160 incorporates all the functional elements for motor driving within a single chip. These include a LIN interface, an embedded microcontroller unit, 6x PWM drivers, and 3x high-voltage I/Os. Extra I/Os allow connecting a dedicated 4-wire latch for motor indexing.

The MLX81160 is embedded into a compact 4 mm x 4 mm QFN24 package which can be fitted on to the smallest PCB when used for state-of-the-art mechatronics.

Other important advantages include faster programmability (with 32 KB Flash completed in <2.5sec) and ASIL B functional safety capabilities. In addition, the dual current sensing feature permits ripple counting and the driving of multiple DC motors.