Trends in the Development and Application of Electronic Driver for Automotive Headlamp

Abstract—The electronic drive of automotive headlamp includes ballast drive, motor drive, LED drive and so on.

In recent years, the number of LED drivers has gradually increased with the popularization of LED applications.

Typical schemes of LED driver include resistive, linear constant current, DC-DC switching power supply. DC-DC

switch is widely used to meet the power requirement of automotive headlamp. It can support any type of output

state, and efficiency is up to 90%. However , EMI is a difficult problem.

Keywords- led; driver;DC-DC;switch;efficiency