Elmos, a leading German semiconductor company, has introduced the E522.46 driver chip specifically designed for automotive interior LED lighting applications. This advanced IC offers an 8-channel high-side driver with the ability to store individual LED classification data and configuration parameters in on-chip EEPROM. Using this stored information, the brightness of each LED can be controlled via PWM input, allowing for precise dimming adjustments. Additionally, the chip supports analog dimming through an external voltage input, providing flexibility in lighting control.
The E522.46 features an I2C interface that enables seamless communication with a host microcontroller, making it ideal for implementing custom animations and user-friendly interfaces in vehicle lighting systems. It is suitable for a wide range of applications, including ambient interior lighting, infotainment button backlighting, taillights, and turn signals. The chip operates within an input voltage range of 3.3V to 32V (with a maximum of 42V) and delivers a maximum output current of 26.5mA per channel.
Each LED channel provides 8-bit current resolution, allowing for fine-tuned control from 1mA to 26.5mA. The chip’s temperature management system can operate at temperatures as high as +165°C, ensuring reliable performance under various conditions. In terms of diagnostics, the E522.46 includes features such as overvoltage/undervoltage monitoring, on-chip temperature sensing, and detection of open or short circuits in LED loads.
This device is AEC-Q100 qualified, meeting the stringent requirements for automotive electronics, and is available in a compact DFN18L5040 package. Its versatile design makes it well-suited for multi-channel backlighting, small current interior lighting, and even industrial LED or RGB lighting applications. With its robust feature set and wide operating range, the E522.46 is a powerful solution for modern automotive lighting systems.
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