A rectangular wave generating circuit has been designed with MOSFETs, half bridge driver chip LM27222 and gate drive transformer. 利用MOS管、半桥驱动芯片LM27222、栅极驱动变压器等器件,设计了变极性矩形波发生电路。
When the electro-magnetic transformer is used in the cold cathode fluorescent lamp ( CCFL) driver, the transformer is very easy to be broken, the EMI and the power lose is very serious, and the weight and volume is hard to be minimized. 电磁式变压器用于冷阴极管驱动器时易被击穿,电磁干扰严重,功率损耗较大,难以使驱动器实现平面化和轻量化。