The Design of High Power LED Headlamp

With the continuous development of LED(Light-Emitting Diode) manufacturing technology, the high power white LED is gradually applied in the field of all kinds of lighting.But with working time increasing of LED chips, their junctions' temperature continue increasing, which lead to decrease light-emitting efficiency and reliability of LED chip, and even be failure. According to the serious heatingof LED chip, this paper has been designed a fin-type aluminum radiator panels using Pro/E software.A LED constant current drive circuit is designed by using LTC3783 chip. With the ANSYS software, thermal analysis was carried out on the fin-type aluminum radiator panels, and eventually the mode of high power LED headlampsis determined. The stability of the LED constant current drive circuit is verified through experiments. The LED headlamps of 90Wworked for ten hours, and the results of the experiments showed that the LED chip junctions' temperature measured are less than 75 degrees Cso we can solve heat dissipation of high power LEDheadlampseffectively.