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tps65217启动方式

Other Parts Discussed in Thread: TPS65217

设计了一块am335x的板子,由tps65217c供电,焊接时,先将arm和内存焊好,再将tps65217c焊好,上电各路输出正常,再将arm最小系统焊接好后上电,电源指示灯一闪而过各路电压均无输出,检查没出现焊接短路的情况,请问是啥问题?