Automakers have been gradually switching to LEDs for headlamps and DRLs (Daytime Running Lights), primarily due to the many advantages that LEDs provide, such as high efficiency and long service life. The adoption of LED DRLs in particular is quickly spreading, especially in Europe, as manufacturers focus on safety.
ROHM's new dedicated LED driver IC (BD8381EFV-M) includes all functions required for LED headlamp switching (high/low) and DRL operation. A step-down DC/DC converter is built in that supports a variety of LED configurations, along with a PWM dimming function required for DRLs, enabling control without a microcontroller. In addition, multiple protection circuits are incorporated, including open/short detection, ensuring a high degree of reliability while reducing the number of external parts.
Source: http://www.rohm.com/ad/led_headlight/index.html
