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TPS65217C 电源路径选择切换问题

Other Parts Discussed in Thread: AM3358

手持式设备,平台用的是AM3358+TPS65217C;目前遇到了一个AC adpater与电池切换的问题,也就是TPS65217C的Power Path Select问题。现象如下:
1、当电池电压大于3.65V时,AC adapter与电池之间切换OK,没发现有任何问题;
2、当电池电压低于3.65V时,AC adapter插入在给电池充电时,如果这时220V市电停了导致AC adapter断电,TPS65217C无法及时切换回电池供电,导致机器关           机;
3、我们也怀疑过出现此问题时,是不是因为电池在低于3.65V时承担负载能力不足(电池为单电池3.7V,1200mAH),改用DC Power,输出电压调到3.5V,模拟电          池插到机器内,再做步骤2试验,TPS65217C还是无法及时切换回电池供电,导致机器关机;

烦请TI电源专家百忙之中能给予解答,谢谢!