The rapid growth expected in the electric vehicle (EV) market — expected to be as much as 25% CAGR over the next decade — is driven by environmental concerns and government support and enabled by Silicon Carbide (SiC) device technology that addresses the requirements of high efficiency and power density.
The on-board charger (OBC) is one of the key power electronics systems in modern EVs and comprises AC-DC and DC-DC power stages. In today’s mainstream models, 6.6 kW unidirectional OBCs are popular in EVs with 400 V battery systems. However, there is a growing trend toward bidirectional OBCs to support emerging vehicle-to-grid (V2G) services.
Wolfspeed’s new automotive qualified E-Series (E3M) 650 V, 60 mΩ MOSFET family helps designers meet the demands of the EV OBC application space.
The direct impact of new efficiency standards is the undisputed need for Silicon Carbide (SiC).
This paper will focus on bidirectional OBCs and discuss the advantages of Silicon Carbide (SiC) in both medium-power (6.6 kW) and high-power (11-22 kW) OBCs.