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TPS65217B 无输出！

user1026316
Intellectual 322 points
Other Parts Discussed in Thread: AM3352

电源管理芯片TPS65217B和AM3352相连，电路图参考beaglebone，（原PCB都没改过！）AC电压输入端正常，但不知是为何，SYS，dc-dc，pwr-en,ldo1,ldo2正常后80-90ms后就掉了，dc2,dc3启动后只输出200mv,也是80-90ms，后就掉了！断掉也3352的供电的串联电阻后，一样问题，5个板子，现象都一致！