LED driver aids smart automotive lighting

With its MeLiBu high-speed communication interface, the MLX81116 multichannel RGB LED driver from Melexis enables animated automotive interior lighting. The design concept of smart animated lighting is to enhance driver-assistance prompts and vehicle-status notification by means of an RGB LED light bar to communicate with the driver through color coding, color changing, and blinking sequences.

Melexis PR photo of MLX81116 LED drivers

Engineering challenges of the animated lighting include maintaining consistent color across all the LEDs in the light bar and ensuring they all change at the same time. Through its MeLiBu communication interface, the MLX81116 controls all individual LEDs in the light bar separately to produce the lighting effects commanded by the vehicle. It also provides real-time compensation of any LED color drift caused by environmental changes.

Melexis PR photo showing automotive interior lighting

MeLiBu employs a CAN-FD physical layer to ensure robustness, reliability, and high speed, while also easing compliance with applicable EMC regulations. Packing an integrated MCU, the MLX81116 achieves color mixing accuracy of <1% delta UV so there are no distinguishable differences between individual LEDs in the light bar. The driver IC has a very wide dimming range that allows optimal brightness adjustment for daytime and night driving.

The MLX81116 operates with a supply voltage of 5.5 to 18V (40-V proof) and comes in a 24-pin, 4×4-mm QFN package. It meets automotive ISO 26262 functional safety requirements up to safety integrity level B (ASIL B).

MLX81116 product page

Melexis, www.melexis.com

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