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LM5067 输出电压过压保护问题

Other Parts Discussed in Thread: LM5067

Hi Guys

基于LM5067的模块在终端客户端遇到一个问题, 系统板子的缓启动电路比LM5067模块的欠压点高,缓启动欠压后,在模块欠压保护之前输入电压再次上升,会触发模块过压保护。绿色是缓启动MOS的驱动,粉色是输入电压,蓝色是模块输入端电压。当输入达到LM5067欠压点后(约30V),MOS关断,模块入口端电压在输出负载的作用下继续下跌,然后输入迅速恢复,缓启动电路MOS开始充电,然后在恒流段电压迅速上升,速率达到输入电压的3-4倍,模块无法调整过来,导致输出过压保护。缓启动应该是限制电压迅速爬升的,为何造成这种情况?有什么办法改善么?

谢谢

-Vincent