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UC3525A: 目前我司使用这款芯片UC3525做一款推挽变换器,但有问题如下

Part Number: UC3525A

变换器特点如下:

1.输入:24V(两节12V7AH铅酸蓄电池)

2.输出:DC350V

3.变压器匝比 5:80

原理图,如图1

其驱动波形和VDS波形如下

上面两通道是VDS,下面是两路VGS

带载200欧姆电阻,问题如下

1.整流桥二极管损坏(二极管MUR460)

2.MOS管发烫很厉害,即效率低

请问这是什么原因造成?

此外VDS波形应该是如下链接https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/964019/tl494-tl494-unstable-question的阶梯波形,我这VDS怎么才能出现VDS波形