功率MOSFET又称功率场效应晶体管,是国际上七十年代后期开发的新型功率器件。它的独到之处是兼有MOS器件和双极型器件的优点,即大电流、高开关速度、高电压、高输入阻抗、无二次击穿,并且驱动方便,有完美的线性区和良好的热稳定性。所以,它一面世,就受到线路设计人员的极大重视和欢迎。目前,国外已在军用、民用工业中广泛应用该器件。特别在开关电源、电机控制、大电流接口、音频和射频 Power MOSFET, also known as power field effect transistor, is a new type of power device developed in the late 1970s. It is unique in that it combines the advantages of MOS devices and bipolar devices with high current, high switching speed, high voltage, high input impedance, no secondary breakdown, easy driving, perfect linearity and good Thermal stability. Therefore, it was published by the circuit designers great attention and welcome. At present, foreign countries have been widely used in military and civilian industries. Especially in the switching power supply, motor control, high current interface, audio and radio frequency