As demand for automotive personalization and comfort rises year after year, the car is no longer merely a means of transport but a space that offers people comfort and ease. High-quality interior trim plays an important role in this and has become a design element that can no longer be overlooked in automotive interiors. In recent years, ambient lighting has seen increasing use in cars as a new type of interior lamp, drawing wide consumer attention and steadily becoming a favorite in the market. Our ambient lighting solution uses the Elmos E521.31 and E521.36 as the main controller, which offers the following key features:
Key Points
- Built-in 16-bit microcontroller
- Supports LIN automatic addressing
- Supports LIN UART automatic baud rate detection
- The E521.31 integrates an LDO delivering 5V/100mA
- The E521.36 integrates a constant-current source, allowing the LED drive current to be adjusted
- Built-in temperature sensor
Solution Overview
The device uses BSM technology to automatically address multiple nodes on the LIN bus. For node connection, auto-addressed LIN nodes can be mixed with standard LIN nodes, so nodes that do not support BSM auto-addressing can also be integrated into the system. This makes node address assignment far more flexible.
Core Components
- IC: E521.36 (Elmos)
- IC: E521.31 (Elmos)
Applications
In-cabin ambient lighting
Reference Design E521.36_2RGB_demo V0.90 / E521.31_4RGB_demo V0.90
- The E521.31 and E521.36 integrate a constant-current source, allowing the LED drive current to be adjusted
- Unique dimming algorithm
Functional Block Diagram
