The converter in xEV is a device that converts the DC power of a battery into a DC power having the voltage or current required by the electric equipment in the vehicle. In this paper, LDC (Low Voltage DC-DC Converter) and OBC (ON Board Charger) power conversion devices are proposed. The ultimate goal is to reduce the size and efficiency of CCM (LDC + OBC). The high efficiency, high capacity, and compact size of LDC and OBC require reliability for DC-DC converters and battery chargers. When applying a new concept of a new material Ga-N HEMT (High Electron Mobilty Transistor), efficiency of 95% or more is guaranteed, and all of the above requirements are satisfied. Accordingly, excellent performance can be exhibited in securing temperature characteristics and reliability. The device proposed in this paper can reduce the size of the conventional LDC and OBC to about 30-40%, which can contribute to reducing the weight of an electric motorcycle. In addition, since it is composed of products specialized in temperature characteristics, it is judged that it is possible to make products suitable for climate variable conditions such as severe bad weather. Therefore, it is possible to develop by maximizing the requirements of xEV companies. This paper, an integrated CCM of LDC+OBC using Ga-N HEMT was developed, and the initial system developed an LDC rated at 30W and an integrated CCM at 30W.

xEV, DC-DC, OBC, LDC, CCMM.