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应用lm5022设计输入9-36V, 输出12v 1a的隔离电源 遇到很多问题

Other Parts Discussed in Thread: TL431

电路图是你们提供的,上电空载输出正常,电压稳得住,不能带负载,一带负载变压器就叫,输出电压跳变

想知道这是什么原因,电路有什么问题吗?

FB接地是不是有问题?

反馈电路有没有问题?