当今,PFC级和DC/DC级对电源效率的要求越来越高,尤其是在轻负载运行中。为满足这些要求,逻辑上工程师应选择使用栅极电荷较低的MOSFET来减少驱动损耗。在整个负载范围内,低栅极电荷可以在开通和关断时实现快速的开关切换。但是,该选择也存在一些缺点。由于栅极存在振荡,因此工程师必须选择一个更高的R_(G,ext)以降低开关速度或使用铁氧体磁珠进行减振。上述任意一种方法都会花费大量的工程设计时间,并且增加设计成本。因此,工程师必须寻找一种既可以提 Today, PFC-class and DC / DC-class power supply efficiency requirements are higher and higher, especially in light-load operation. To meet these requirements, engineers should logically choose to use lower gate charge MOSFETs to reduce drive losses. Low gate charge enables fast switching on and off over the entire load range. However, there are some disadvantages to this choice. Because of the oscillation at the gate, engineers must choose a higher R_ (G, ext) to reduce switching speed or use ferrite beads for damping. Any of these methods can cost a significant amount of engineering time and increase design costs. Therefore, engineers must find a way to mention both