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TPS65217C使用电池供电无法启动的问题

Other Parts Discussed in Thread: AM3352

系统为TPS65217C+AM3352,电池是3.7V.10400mAh的电池,接到65217c的BAT管脚上,65217的7,8脚(SYS电压)输出3.7V,RTC没有1.8V;用直流源给电池管脚供5V电仍然无法工作

但是65217的10脚AC管脚接5V的电源,系统就可正常工作.

怀疑是上电使用的电源需要配置的问题,但是65217都没有电,应该无法配置才对,请高手解答