| Abstract |
This paper presents design of two-stage scheme using BCM boost+LLC resonant converter for high power density
AC/DC notebook adaptors. This scheme is generally used for several hundreds watt applications but has not been tried
in small size power supplies such as adaptors. In order that this scheme becomes useful topology for adaptor applications, it should meet no load power consumption regulations as well as high efficiency. To do so, switching loss should be minimized and it can be accomplished by deriving device loss equations. Using the loss analysis, some design guidelines are suggested and verified with 85 W(18.5 V/4.6 A) design with 0.89 W/cm3. Test results shows that the measured efficiency is 90.6 % at 90 Vrms and no load power consumption can be reduced to about 0.5 W. |
