ROHM's extensive range of high-performance, energy-efficient LED drivers is used in numerous automotive applications for interior and exterior lighting, contributing to reliable, advanced, and cost-effective designs. Within this range, ROHM offers the latest developments in exterior lighting, including LED high and low beam headlights, LED matrix/pixel headlights, and sequential turn signals. For example, the BD18312MUF LED driver is suitable for LED high and low beam headlights, Daytime Running Lights (DRL), and fog lights. This device incorporates one boost converter and two buck converters and is controlled by a microcontroller via a Serial Peripheral Interface (SPI). The SPI provides control capabilities and indicates system status, ensuring high system reliability.
The company's SPI-controlled LED matrix headlight controller enables adaptive front lighting. It consists of individual switches that control up to six LEDs, each with its own brightness control and diagnostics. In the event of a system failure, the device will automatically switch to a predefined autonomous mode.
ROHM's matrix drivers, models BD18360 and BD18361, can be used for dynamic turn signals. To serve different markets, there is a product designed for standalone functionality (BD18360) and one that uses a microcontroller for advanced communication control (BD18361). The constant current required by the matrix drivers can be obtained from the step-down LED driver (BD18391EFV-M).
