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LM5030的推挽电源,输出侧电压尖峰的原因

Other Parts Discussed in Thread: LM5030

用LM5030做了一个推挽结构的电源,出现输出侧整流桥前后出现电压尖峰,在LM5030的手册中(AN-1305 LM5030 Evaluation Board)也有发现,如图:

也就是图中的V9和V5

下图是我测量到的:

就是上图中的黄色波形的尖峰

请问这个尖峰形成的原因是什么?怎么减小,谢谢!