The Investigation of Switching Losses in a High Power Factor Buck Converter Using The State of The-Art CooiMos Device

Switching losses is one of the phenomena that occur in power electronic fields,
which cause the imperfection of the output waveform. There are lots of ways defined it
encounter this problem such as snubber usage, tapped-inductor, MOSFETS and etc. In
this century, semiconductor field came out with the revolution of the MOSFET, which is
called Coo!MOS in order to reduce the switching losses and give high efficiency. The
CoolMOS become famous as it can reduce 80% reduction of switching losses and low
cost. Coo!MOS technology - developed for the production of charge-compensated
devices - is presented. Due to its novel internal structure, the device offers a dramatic
reduction in on-state resistance with a completely altered voltage dependence of the
device capacitance. If the power factor is small which is below than 0.85, it causes large
amount of power loss (Losses = I2R) and power that should apply not achieved as target.
In worst cases it causes equipment damaged and power supply trip. This will affect whole
process especially for manufacturing company. Basically, this project needs to evaluate
the performance of CoolMOS in improving the switching losses especially in Buck
Converter. The main focus is on the parameters that contributing in developing high
power factor. Its mean that selection of components used is very important such as
inductor value. As conclusion, Buck converter is one of the best methods to investigate
power factor correction. Moreover, Coo!MOS device is a good device which should be
varies its application in the future.