输出随MOS开关断还抖动.困惑/求解

自已给自已顶一下,希望达人指点

各位兄弟出出主意,看有没有办法解决.
我的办法已用尽,在线等候了

I think that it`s main caused by pcb layout
  and the coupling CAP of mosfet of GS and DG
for pcb layout : first we may check ic of ground which is away from mosfet `s S and there is a coupling inductance
1:solve this issue : the choice of small couling cap which is between G TO S of cap and  D TO G of cap
2: IC `ground is closed to mosfet`s what I said is only distance but not across pcb layout  make it together  
  do you know

G,是哪个端口?你是说在TOP249Y上的D,S两端加电容?
我附上电路图请看一下,而且现在有另外一个现象:
变压器有吱吱的叫声.估计产生涡流了还是什么原因,这不是主要问题.重要的还是主题提出的问题.知道不知道原因的工程师请都热心的参与一下,谢谢了. 1537181179458288.rar

便于各位分析问题,再附上PCB 1537181179458642.rar