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LM43603异常,重启后无输出

Other Parts Discussed in Thread: LM43603

我做了一LM43603样板,输入DC18~30V,输出12V-3A。按你们的手册中的原理图,板子焊接后上电DC28V(直流源),第一次正常启动。关闭后再次就无法启动了。试了三块芯片都是这样的。原理图如附件截图。