MLX81119 integrates on-chip DC/DC, LIN RGB automotive lighting

The latter generates an optimised local LED supply voltage that is programmable between 2.5 V and 6 V.

Example applications include in dashboards and door trim parts, dynamic light animations and exterior charge port lighting, pictured.

Controller

The part is powered by a 16-bit MCU with 32 KB Flash, 13.5 KB ROM and 4 KB RAM, the controller includes built-in temperature sensing for active colour compensation.

In terms of the LED control, the MLX81119 supports Red/Green and Blue LED temperature compensation without additional external components. The LEDs are fully diagnosable, in terms of short circuit, broken line or threshold monitoring). And there is storage of LED calibration data directly within the LED driver.

Building on the MLX81118 architecture, the MLX81119 integrates a LIN (Local Interconnect Network) system, including transceiver and protocol handler. This is fully compliant with LIN 2.x and SAE J2602, highlights Melexis.

MLX81119 Features

The full list of features is as follows.

• 18 LED drivers with configurable current sources (up to 60 mA each)
• Integrated DCDC converter (dynamic) (programmable between 2.5 V and 6 V for LED supply, up to 1 A output current, with diagnostics)
• Single LIN Slave Node system
• LIN protocol controller according to ISO17987-4 and SAE J2602
• Support for auto-addressing according to bus shunt method
• 16-bit MCU for extended LED control algorithm, color mixing and full diagnosis
• Red/Green and Blue LED temperature compensation without additional external components
• LEDs fully diagnosable (Short circuit, broken line, threshold monitor)
• Storage of LED calibration data directly within LED driver
• Direct LED drive without additional external components
• 3 – 18 V supply voltage (40 V proof)
• Low standby current consumption of typ. 25 µA (max 50 µA) in sleep mode
• Automotive temperature range of -40 °C to 125 °C
• ASIL B classification
• AECQ-100 qualified
• QFN 5×5 RoHS package with wettable flanks, 32 pins

“With the MLX81119, we have created a solution that directly addresses the constraints facing modern automotive lighting designs,” said the Product Line Director at Melexis, Michael Bender.

“By integrating the DC/DC converter and dynamically adapting the LED supply voltage, engineers can simplify their designs, improve system efficiency, and scale lighting architectures without adding complexity.”

You can read more about the MLX81119 on the Melexis website.

The part is available now.

Melexis headquarters are in Tessenderlo-Ham, Belgium.

See also: Melexis hooks up with OYMotion on robotic hands