Smart LIN RGB ambient light controller with 4 drivers (Gen5)
MLX81124 Melexis
The MLX81124 is a LIN RGB LED driver for automotive ambient lighting. It is intended for single commander multiple responder systems. The MLX81124 is pin-to-pin and function-compatible with the MLX81123
Top features
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Application controller
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16-bit pipelined RISC microcontroller
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32 KB Flash
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System ROM with bootloader and LIN driver
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2 KB RAM
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512 B EEPROM
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Math co-processor for 32-bit MUL/DIV operations
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Two Watchdog timers with independent clocks
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Internal RC oscillator (max 32 MHz)
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LIN Physical layer transceiver
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LIN physical Layer compliant to ISO 17987-4 and SAE J2602
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LIN protocol controller compliant to ISO 17987-4 and SAE J2602
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Support for auto-addressing according to bus shunt method
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Voltage regulator
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Low standby current consumption of typ. 25 µA (max 50 µA) in sleep mode
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Integrated battery monitor including over- and under-voltage detection
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Low Side Current Source
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4x high voltage I/Os with free configurable current sources (up to 60 mA) for RGB+W
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4x 16-bit PWM outputs with configurable resolution
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12 bit ADC with DMA
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Multiple channels (outputs, VS, temperature sensor, IOs)
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Different reference voltages
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Differential as well as single-ended measurement capability
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DMA access
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Automotive standard
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Automotive temperature range of -40 °C to 125 °C
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28 V jump start
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Integrated temperature sensor
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ASIL compliant (ISO 26262), supporting safety system integration up to ASIL B
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Diagnostic capability for connected LED (short, open, threshold)
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AECQ-100 qualified
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Packages RoHS compliant:
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SOIC8 (DC) package with exposed pad
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Smart LIN RGB ambient light controller with 4 drivers (Gen5) - MLX81124
Product description
The MLX81124 IC is a fully integrated low-end LIN responder for ambient light applications in automotive environments to drive RGB LEDs via LIN bus .
The MLX81124 is pin-to-pin and function-compatible with the MLX81123.
It is suitable for bus systems according to LIN 2.x as well as SAE J2602. For safety applications, it supports system integration up to ASIL B in accordance with ISO 26262. The MLX81124's integrated physical layer LIN transceiver, LIN protocol controller, and current-controlled outputs enable rapid development of straightforward yet effective and economical ambient light modules for LIN bus systems.
The advanced 16-bit microcontroller unit (MCU) is equipped with 2 KB RAM, 32 KB of application-usable flash, and a system ROM with a bootloader and LIN driver. A built-in 512 B EEPROM allows for effective configuration, such as LED calibration coefficients, which are needed to ensure uniform cabin brightness and color representation.
The MLX81124 can support RGB and white LEDs from a wide range of suppliers, allowing for greater procurement flexibility. The IC’s independent 16-bit PWM output provides precise color and brightness control of any connected LEDs, meeting the demands of a variety of vehicle ambient applications such as door trim, accent, and interior cabin lights.
Features and benefits
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Application controller
-
16-bit pipelined RISC microcontroller
-
32 KB Flash
-
System ROM with bootloader and LIN driver
-
2 KB RAM
-
512 B EEPROM
-
-
Math co-processor for 32-bit MUL/DIV operations
-
Two Watchdog timers with independent clocks
-
Internal RC oscillator (max 32 MHz)
-
-
LIN Physical layer transceiver
-
LIN physical Layer compliant to ISO 17987-4 and SAE J2602
-
LIN protocol controller compliant to ISO 17987-4 and SAE J2602
-
Support for auto-addressing according to bus shunt method
-
-
Voltage regulator
-
Low standby current consumption of typ. 25 µA (max 50 µA) in sleep mode
-
Integrated battery monitor including over- and under-voltage detection
-
-
Low Side Current Source
-
4x high voltage I/Os with free configurable current sources (up to 60 mA) for RGB+W
-
4x 16-bit PWM outputs with configurable resolution
-
-
12 bit ADC with DMA
-
Multiple channels (outputs, VS, temperature sensor, IOs)
-
Different reference voltages
-
Differential as well as single-ended measurement capability
-
DMA access
-
-
Automotive standard
-
Automotive temperature range of -40 °C to 125 °C
-
28 V jump start
-
Integrated temperature sensor
-
ASIL compliant (ISO 26262), supporting safety system integration up to ASIL B
-
Diagnostic capability for connected LED (short, open, threshold)
-
AECQ-100 qualified
-
-
Packages RoHS compliant:
-
SOIC8 (DC) package with exposed pad
-
Documents and tools
Application flyer(s)
Datasheet(s)
Selection guide(s)
IC handling and assembly
Videos
LIN RGB drivers for automotive ambient lighting
Melexis offers a range of smart LED drivers for automotive lighting in various packages, including DFN-8, SOIC-8, and multichannel QFN-32 options. The DFN variant is particularly noteworthy for its miniaturized size, making it ideal for applications where space is limited. These drivers provide intelligent control and advanced features for automotive lighting systems, enhancing functionality and customization.
