Design and development of driver protection circuit of self turn off devices of electric vehicle DC charger

摘要

In this paper, we design and develop a driver protection circuit of self turn off devices of electric vehicle DC charger based on the chip UAA4002. Take power transistor, for example, we study and design the topological structures of the Optocoupler isolation circuit, control circuit, anti-saturation circuit, composite buffer circuit. Then we integrate these circuits and obtain the formation of self turn off device drivers, isolation and protection circuit. The circuit has a simple circuit structure, perfect function, high reliability, low switching losses and fast response.