LED Driver for Automotive Headlamps
- Created: Tuesday, 05 October 2010
ROHM Semiconductor (San Diego, CA) introduces the Model BD8381EFV-M high-brightness LED driver for automotive forward illumination applications. With this flexible IC, designers can specify the same driver for use in high-beam, low-beam, and daytime running light (DRL) circuits.
The BD8381EFV-M current-mode buck/boost controller provides stable operation over a wide input voltage (5-30V) and removes constraints on the number of LEDs in series connection. Integrated protection monitors voltage, current, and temperature. LED open and short circuit detection is also provided. The BD8381EFV-M has an internal PWM controller so dimming functions can be implemented with a simple external CR circuit. This same circuit can be implemented to limit output current in case of LED overtemperature detection.