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lm3481开机无法启动的问题

Other Parts Discussed in Thread: CSD19533Q5A, CSD19502Q5B, LM3481

论坛的大虾,在测试时出现,在空载和加载的情况下,24V输入时,输出无电压输出。将输入电压逐步减小到12V左右时,电源就输出正常。工作一段时间后,断掉输入,再次上电,输出正常。长时间断电后,第一次加电,没有输出。此时LM3481  DR输出为间断的控制信号。不知道是哪方面影响到的。5125.snvu528评估板.pdf