Melexis has announced new ultra-compact LED driver chips for cost-effective and flexible ambient lighting applications in vehicles. The new configurable LIN (Local Interconnect Network) slave LED driver ICs deliver the precise control of RGB lighting needed to personalize cabin interiors, improve driver attention and enhance the overall driving experience.
The single-channel MLX81112 and dual-channel MLX81115 are fully LIN 2.x and SAE J2602 compliant, and need less than half the passive components compared to competing solutions, offering a low-BOM solution to drive LEDs via constant current sources.
“Whether for style, security or the ability to personalize the driving environment, ambient lighting is an increasingly important feature for today’s car drivers,” states Michael Bender, Product Line Manager for In-Vehicle Networking at Melexis. “Melexis continues to lead the field in mixed-signal solutions for automotive applications offering integrated, single-chip LIN slave solutions for ambient lighting designs. With this latest generation, we can help designers to further reduce board space, component count and cost and open up greater opportunities for vehicle manufacturers to benefit from LIN-based ambient lighting solutions.”
Both of the new ICs are built around a 16-bit microcontroller featuring 32kB of Flash memory with error correcting code. Additional memory resource is provided by a 16kByte ROM (which contains the necessary RGB mix algorithms and LIN driver), a 2kByte RAM and a 380Byte EEPROM.
Also included are a 10-bit analog-to-digital converter (with integrated pre-divider), a LIN protocol controller, a LIN transceiver, four configurable constant current outputs and four 16-bit PWM outputs. A 24MHz RC-based clock oscillator ensures accurate timing while a voltage regulator is provided for power management.
The new RGB slave controllers, according to the firm, ensure consistent ambient lighting performance across variations in voltage, temperature and LED characteristics. Each device exhibits robust EMC/ESD characteristics, can accommodate a wide voltage input range (from 6V to 18V) and draws very little standby current (20µA typically).
Operational temperature range is from -40°C to 125°C with over-temperature shutdown and load dump protection mechanisms enhancing ongoing reliability. Temperature and battery monitoring capabilities are also provided.
The MLX81112 is supplied in 8-pin SOIC package, while the MLX81115 comes in a 12-pin DFN package.
For further details, view the full Press release.