While LED lights are starting to pop up in more automotive applications, they are not a direct substitute for conventional lighting. LEDs require a constant current to produce consistent light. Voltage supply variations common in vehicles must be avoided, along with overvoltage or overcurrent that could damage the light. Rohm Semiconductor now offers its model BD8381EFV-M high-brightness LED driver for automotive forward illumination applications. It provides stable operation over a wide input voltage (5-30 V). With the new flexible IC, designers can specify the same driver for use in high-beam, low-beam, and daytime running light circuits. With a buck/boost configuration, it also handles series LED connections numbering from just one to several. It also controls dimming without PWM input along with a range of protection functions.